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How to check if every segments of a road have the same directions?

ZenekS_

Hi,

I’m attempting to make a linear referencing. It’s a polyline M layer (with lengths along every line) of forest roads . Every road (unique road number) consists of 1, 2 or more segments. In the attribute table I have a field with segment_id (unique in the layer) and a field with the road_number (many segments can have the same road_number). The layer is sorted ascending by segment_id and road_number.

The problem is – how to check if every segments of one road_number have the same direction. Maybe the solution is to calculate distance for end point and start point of subsequent segments in every road_number (but not for first and last segments – only the middle segments). When the distance if more than 0 – it will be an error. But how to calculate it?

Thanks for any suggestions how to solve this.

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XanderBakker

You could try this. It will take the input fields to the output featureclass and add a field "FlipCase" that will hold "Flipped" when the polyline was flipped. However, the M values are not reversed for each point. Are the M values length values?

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">main</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">import</SPAN> arcpy
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">import</SPAN> os

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># input fc and name of field containing route name</SPAN>
&nbsp;&nbsp;&nbsp; fc <SPAN class="operator token">=</SPAN> r<SPAN class="string token">'C:\GeoNet\RoadDirection2\test.gdb\roads_m'</SPAN>
&nbsp;&nbsp;&nbsp; fc_out <SPAN class="operator token">=</SPAN> r<SPAN class="string token">'C:\GeoNet\RoadDirection2\test.gdb\roads_m_corr7'</SPAN> <SPAN class="comment token"># output fc</SPAN>
&nbsp;&nbsp;&nbsp; fld_name <SPAN class="operator token">=</SPAN> <SPAN class="string token">'RouteName'</SPAN>
&nbsp;&nbsp;&nbsp; fld_id <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Segment_ID'</SPAN>
&nbsp;&nbsp;&nbsp; fld_case <SPAN class="operator token">=</SPAN> <SPAN class="string token">'FlipCase'</SPAN>&nbsp; <SPAN class="comment token"># stores info on correction feature</SPAN>
&nbsp;&nbsp;&nbsp; tolerance <SPAN class="operator token">=</SPAN> <SPAN class="number token">10</SPAN> <SPAN class="comment token"># tolerance for searching connecting segments for same route</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># sr</SPAN>
&nbsp;&nbsp;&nbsp; sr <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>spatialReference
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>env<SPAN class="punctuation token">.</SPAN>OverwriteOutput <SPAN class="operator token">=</SPAN> <SPAN class="token boolean">True</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># create dictionary of data</SPAN>
&nbsp;&nbsp;&nbsp; dct_routes <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; dct_seg_id_oid <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; dct_oid_seg_id <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; flds <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="string token">'OID@'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'SHAPE@'</SPAN><SPAN class="punctuation token">,</SPAN> fld_name<SPAN class="punctuation token">,</SPAN> fld_id<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">with</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>SearchCursor<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">,</SPAN> flds<SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> curs<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> row <SPAN class="keyword token">in</SPAN> curs<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_data <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid <SPAN class="operator token">=</SPAN> row<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; polyline <SPAN class="operator token">=</SPAN> row<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; route_name <SPAN class="operator token">=</SPAN> row<SPAN class="punctuation token">[</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; seg_id <SPAN class="operator token">=</SPAN> row<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_seg_id_oid<SPAN class="punctuation token">[</SPAN>seg_id<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> oid
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_oid_seg_id<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> seg_id
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> route_name <SPAN class="keyword token">in</SPAN> dct_routes<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_data <SPAN class="operator token">=</SPAN> dct_routes<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_data<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>polyline<SPAN class="punctuation token">,</SPAN> seg_id<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_data<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>polyline<SPAN class="punctuation token">,</SPAN> seg_id<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_routes<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> dct_data

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># supporting dct with oid and geometry</SPAN>
&nbsp;&nbsp;&nbsp; dct_oid_geom <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN>r<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN> r<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="keyword token">for</SPAN> r <SPAN class="keyword token">in</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>SearchCursor<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">,</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="string token">'OID@'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'SHAPE@'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">}</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># determnine first segment of route based on segment id</SPAN>
&nbsp;&nbsp;&nbsp; dct_start_seg_id <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> route_name<SPAN class="punctuation token">,</SPAN> dct_data <SPAN class="keyword token">in</SPAN> sorted<SPAN class="punctuation token">(</SPAN>dct_routes<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; seg_ids <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>s<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="keyword token">for</SPAN> p<SPAN class="punctuation token">,</SPAN>s <SPAN class="keyword token">in</SPAN> dct_data<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_start_seg_id<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> min<SPAN class="punctuation token">(</SPAN>seg_ids<SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># trace route from staring seg_id to end</SPAN>
&nbsp;&nbsp;&nbsp; lst_flip_oid <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; lst_candidates_todo <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; lst_multi_candidates <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; dct_route_order <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> route_name<SPAN class="punctuation token">,</SPAN> seg_id <SPAN class="keyword token">in</SPAN> sorted<SPAN class="punctuation token">(</SPAN>dct_start_seg_id<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; route_order <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>seg_id<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"trace:"</SPAN><SPAN class="punctuation token">,</SPAN> route_name<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">" starting @"</SPAN><SPAN class="punctuation token">,</SPAN> seg_id
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_data <SPAN class="operator token">=</SPAN> dct_routes<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_start_pnts <SPAN class="operator token">=</SPAN> CreateDictionaryStartOrEndPoints<SPAN class="punctuation token">(</SPAN>dct_data<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_end_pnts <SPAN class="operator token">=</SPAN> CreateDictionaryStartOrEndPoints<SPAN class="punctuation token">(</SPAN>dct_data<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"end"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid <SPAN class="operator token">=</SPAN> dct_seg_id_oid<SPAN class="punctuation token">[</SPAN>seg_id<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; start_pnt <SPAN class="operator token">=</SPAN> dct_start_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end_pnt <SPAN class="operator token">=</SPAN> dct_end_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_processed <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_todo <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>o <SPAN class="keyword token">for</SPAN> o<SPAN class="punctuation token">,</SPAN> lst <SPAN class="keyword token">in</SPAN> dct_data<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">if</SPAN> o <SPAN class="operator token">!=</SPAN> oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">while</SPAN> len<SPAN class="punctuation token">(</SPAN>lst_todo<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">></SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"lst_processed:"</SPAN><SPAN class="punctuation token">,</SPAN> lst_processed
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># get candidates for end point of line</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_cand_end<SPAN class="punctuation token">,</SPAN> start_end_end<SPAN class="punctuation token">,</SPAN> dist_from_end <SPAN class="operator token">=</SPAN> GetCandidate<SPAN class="punctuation token">(</SPAN>end_pnt<SPAN class="punctuation token">,</SPAN> dct_start_pnts<SPAN class="punctuation token">,</SPAN> dct_end_pnts<SPAN class="punctuation token">,</SPAN> lst_todo<SPAN class="punctuation token">,</SPAN> tolerance<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - GetCandidate 1:"</SPAN><SPAN class="punctuation token">,</SPAN> oid_cand_end<SPAN class="punctuation token">,</SPAN> start_end_end<SPAN class="punctuation token">,</SPAN> dist_from_end
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># get candidates for start point of line</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_cand_start<SPAN class="punctuation token">,</SPAN> start_end_start<SPAN class="punctuation token">,</SPAN> dist_from_start <SPAN class="operator token">=</SPAN> GetCandidate<SPAN class="punctuation token">(</SPAN>start_pnt<SPAN class="punctuation token">,</SPAN> dct_start_pnts<SPAN class="punctuation token">,</SPAN> dct_end_pnts<SPAN class="punctuation token">,</SPAN> lst_todo<SPAN class="punctuation token">,</SPAN> tolerance<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - GetCandidate 2:"</SPAN><SPAN class="punctuation token">,</SPAN> oid_cand_start<SPAN class="punctuation token">,</SPAN> start_end_start<SPAN class="punctuation token">,</SPAN> dist_from_start

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># check is there are candidates</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist_from_start <SPAN class="operator token">==</SPAN> <SPAN class="number token">9999</SPAN> <SPAN class="operator token">and</SPAN> dist_from_end <SPAN class="operator token">==</SPAN> <SPAN class="number token">9999</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># no candidates</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN><SPAN class="string token">" - no candidates!"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_candidates_todo<SPAN class="punctuation token">.</SPAN>extend<SPAN class="punctuation token">(</SPAN>lst_todo<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_todo <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_found <SPAN class="operator token">=</SPAN> None

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> dist_from_start <SPAN class="operator token">==</SPAN> dist_from_end<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># two candidates with same score, error!</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - two candidates with same score, error!"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_multi_candidates<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN>oid_cand_end<SPAN class="punctuation token">,</SPAN> oid_cand_start<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_candidates_todo<SPAN class="punctuation token">.</SPAN>extend<SPAN class="punctuation token">(</SPAN>lst_todo<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_todo <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_found <SPAN class="operator token">=</SPAN> None

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> dist_from_start <SPAN class="operator token"><</SPAN> dist_from_end<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># candidate is at start of line, requires flip of current oid</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - candidate is at start of line, requires flip of current oid"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> start_end_start <SPAN class="operator token">==</SPAN> <SPAN class="string token">"end"</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># also candidate need to be flipped</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - current start connects to candidate end, also candidate need to be flipped"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - adding candidate oid "</SPAN><SPAN class="punctuation token">,</SPAN> oid_cand_start<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">" to flip list"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_flip_oid<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>oid_cand_start<SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> <SPAN class="operator token">not</SPAN> oid <SPAN class="keyword token">in</SPAN> lst_flip_oid<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_flip_oid<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>oid<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - adding current oid "</SPAN><SPAN class="punctuation token">,</SPAN> oid<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">" to flip list"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_found <SPAN class="operator token">=</SPAN> oid_cand_start

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># candidate is at end of line, OK</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> start_end_end<SPAN class="operator token">==</SPAN> <SPAN class="string token">"end"</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># current end connects to candidate end, candidate need to be flipped</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - current end connects to candidate end, candidate need to be flipped"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_flip_oid<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>oid_cand_end<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"&nbsp;&nbsp; - adding candidate oid "</SPAN><SPAN class="punctuation token">,</SPAN> oid_cand_end<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">" to flip list"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_found <SPAN class="operator token">=</SPAN> oid_cand_end

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> oid_found <SPAN class="operator token">!=</SPAN> None<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; start_pnt <SPAN class="operator token">=</SPAN> dct_start_pnts<SPAN class="punctuation token">[</SPAN>oid_found<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end_pnt <SPAN class="operator token">=</SPAN> dct_end_pnts<SPAN class="punctuation token">[</SPAN>oid_found<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_processed<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>oid_found<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; route_order<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>dct_oid_seg_id<SPAN class="punctuation token">[</SPAN>oid_found<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_todo<SPAN class="punctuation token">.</SPAN>remove<SPAN class="punctuation token">(</SPAN>oid_found<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid <SPAN class="operator token">=</SPAN> oid_found


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"lst_todo"</SPAN><SPAN class="punctuation token">,</SPAN> lst_todo
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"lst_flip_oid"</SPAN><SPAN class="punctuation token">,</SPAN> lst_flip_oid
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_route_order<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> route_order
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN>


&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"lst_flip_oid&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; :"</SPAN><SPAN class="punctuation token">,</SPAN> sorted<SPAN class="punctuation token">(</SPAN>lst_flip_oid<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"lst_candidates_todo :"</SPAN><SPAN class="punctuation token">,</SPAN> sorted<SPAN class="punctuation token">(</SPAN>lst_candidates_todo<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"lst_multi_candidates:"</SPAN><SPAN class="punctuation token">,</SPAN> lst_multi_candidates

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> route_name<SPAN class="punctuation token">,</SPAN> route_order <SPAN class="keyword token">in</SPAN> sorted<SPAN class="punctuation token">(</SPAN>dct_route_order<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - Route:"</SPAN><SPAN class="punctuation token">,</SPAN> route_name<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"&nbsp; seg id order:"</SPAN><SPAN class="punctuation token">,</SPAN> route_order


&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># create output featureclass</SPAN>
&nbsp;&nbsp;&nbsp; ws<SPAN class="punctuation token">,</SPAN> fc_name <SPAN class="operator token">=</SPAN> os<SPAN class="punctuation token">.</SPAN>path<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN>fc_out<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>CreateFeatureclass_management<SPAN class="punctuation token">(</SPAN>ws<SPAN class="punctuation token">,</SPAN> fc_name<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"POLYLINE"</SPAN><SPAN class="punctuation token">,</SPAN> fc<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"ENABLED"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"DISABLED"</SPAN><SPAN class="punctuation token">,</SPAN> sr<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddField_management<SPAN class="punctuation token">(</SPAN>fc_out<SPAN class="punctuation token">,</SPAN> fld_case<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"TEXT"</SPAN><SPAN class="punctuation token">,</SPAN> None<SPAN class="punctuation token">,</SPAN> None<SPAN class="punctuation token">,</SPAN> <SPAN class="number token">50</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; flds_in <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>fld<SPAN class="punctuation token">.</SPAN>name <SPAN class="keyword token">for</SPAN> fld <SPAN class="keyword token">in</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>ListFields<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; flds_out <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>fld<SPAN class="punctuation token">.</SPAN>name <SPAN class="keyword token">for</SPAN> fld <SPAN class="keyword token">in</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>ListFields<SPAN class="punctuation token">(</SPAN>fc_out<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; flds_in<SPAN class="punctuation token">.</SPAN>remove<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'Shape_Length'</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; flds_out<SPAN class="punctuation token">.</SPAN>remove<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'Shape_Length'</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; fld_geom <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>ShapeFieldName
&nbsp;&nbsp;&nbsp; fld_oid <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>OIDFieldName

&nbsp;&nbsp;&nbsp; flds_in<SPAN class="punctuation token">[</SPAN>flds_in<SPAN class="punctuation token">.</SPAN>index<SPAN class="punctuation token">(</SPAN>fld_geom<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> <SPAN class="string token">'SHAPE@'</SPAN>
&nbsp;&nbsp;&nbsp; i_oid <SPAN class="operator token">=</SPAN> flds_in<SPAN class="punctuation token">.</SPAN>index<SPAN class="punctuation token">(</SPAN>fld_oid<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; flds_in<SPAN class="punctuation token">[</SPAN>flds_in<SPAN class="punctuation token">.</SPAN>index<SPAN class="punctuation token">(</SPAN>fld_oid<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> <SPAN class="string token">'OID@'</SPAN>
&nbsp;&nbsp;&nbsp; flds_out<SPAN class="punctuation token">[</SPAN>flds_out<SPAN class="punctuation token">.</SPAN>index<SPAN class="punctuation token">(</SPAN>fld_geom<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> <SPAN class="string token">'SHAPE@'</SPAN>
&nbsp;&nbsp;&nbsp; flds_out<SPAN class="punctuation token">[</SPAN>flds_out<SPAN class="punctuation token">.</SPAN>index<SPAN class="punctuation token">(</SPAN>fld_oid<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> <SPAN class="string token">'OID@'</SPAN>

&nbsp;&nbsp;&nbsp; fld_geom <SPAN class="operator token">=</SPAN> <SPAN class="string token">'SHAPE@'</SPAN>
&nbsp;&nbsp;&nbsp; fld_oid <SPAN class="operator token">=</SPAN> <SPAN class="string token">'OID@'</SPAN>

&nbsp;&nbsp;&nbsp; cnt <SPAN class="operator token">=</SPAN> <SPAN class="number token">0</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">with</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>InsertCursor<SPAN class="punctuation token">(</SPAN>fc_out<SPAN class="punctuation token">,</SPAN> flds_out<SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> curs_out<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">with</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>SearchCursor<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">,</SPAN> flds_in<SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> curs<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> row <SPAN class="keyword token">in</SPAN> curs<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; cnt <SPAN class="operator token">+=</SPAN> <SPAN class="number token">1</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> cnt <SPAN class="operator token">%</SPAN> <SPAN class="number token">100</SPAN> <SPAN class="operator token">==</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"Processing feature:"</SPAN><SPAN class="punctuation token">,</SPAN> cnt
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid <SPAN class="operator token">=</SPAN> row<SPAN class="punctuation token">[</SPAN>i_oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; polyline <SPAN class="operator token">=</SPAN> dct_oid_geom<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="comment token"># row[i_shp]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> oid <SPAN class="keyword token">in</SPAN> lst_flip_oid<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; case <SPAN class="operator token">=</SPAN> <SPAN class="string token">"Flipped"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; polyline_out <SPAN class="operator token">=</SPAN> FlipPolyline<SPAN class="punctuation token">(</SPAN>polyline<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; case <SPAN class="operator token">=</SPAN> <SPAN class="string token">"OK"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; polyline_out <SPAN class="operator token">=</SPAN> polyline

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row_out <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> fld_name <SPAN class="keyword token">in</SPAN> flds_out<SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">:</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row_out<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>row<SPAN class="punctuation token">[</SPAN>flds_in<SPAN class="punctuation token">.</SPAN>index<SPAN class="punctuation token">(</SPAN>fld_name<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row_out<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>case<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row_out<SPAN class="punctuation token">[</SPAN>flds_out<SPAN class="punctuation token">.</SPAN>index<SPAN class="punctuation token">(</SPAN>fld_geom<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> polyline_out
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> row_out
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tpl_row <SPAN class="operator token">=</SPAN> tuple<SPAN class="punctuation token">(</SPAN>row_out<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; curs_out<SPAN class="punctuation token">.</SPAN>insertRow<SPAN class="punctuation token">(</SPAN>tpl_row<SPAN class="punctuation token">)</SPAN>



<SPAN class="keyword token">def</SPAN> <SPAN class="token function">FlipPolyline</SPAN><SPAN class="punctuation token">(</SPAN>polyline<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"before:"</SPAN><SPAN class="punctuation token">,</SPAN> polyline<SPAN class="punctuation token">.</SPAN>length
&nbsp;&nbsp;&nbsp; vertices <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> part <SPAN class="keyword token">in</SPAN> polyline<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> pnt <SPAN class="keyword token">in</SPAN> part<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; vertices<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>pnt<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; polyline_out <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Polyline<SPAN class="punctuation token">(</SPAN>arcpy<SPAN class="punctuation token">.</SPAN>Array<SPAN class="punctuation token">(</SPAN>vertices<SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">:</SPAN><SPAN class="punctuation token">:</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; polyline<SPAN class="punctuation token">.</SPAN>spatialReference<SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">False</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">True</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"after :"</SPAN><SPAN class="punctuation token">,</SPAN> polyline_out<SPAN class="punctuation token">.</SPAN>length
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> polyline_out

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">GetCandidate</SPAN><SPAN class="punctuation token">(</SPAN>end_pnt<SPAN class="punctuation token">,</SPAN> dct_start_pnts<SPAN class="punctuation token">,</SPAN> dct_end_pnts<SPAN class="punctuation token">,</SPAN> lst_todo<SPAN class="punctuation token">,</SPAN> tolerance<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># return oid_cand_start, start_end, dist_from_start</SPAN>
&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> <SPAN class="number token">9999</SPAN>
&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> None
&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> None
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> oid<SPAN class="punctuation token">,</SPAN> pnt <SPAN class="keyword token">in</SPAN> dct_start_pnts<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> oid <SPAN class="keyword token">in</SPAN> lst_todo<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist <SPAN class="operator token">=</SPAN> GetDistance<SPAN class="punctuation token">(</SPAN>end_pnt<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> end_pnt<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">,</SPAN> pnt<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist <SPAN class="operator token"><</SPAN> tolerance<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist <SPAN class="operator token"><</SPAN> dist_min<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> dist
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> oid
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> <SPAN class="string token">"start"</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> oid<SPAN class="punctuation token">,</SPAN> pnt <SPAN class="keyword token">in</SPAN> dct_end_pnts<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> oid <SPAN class="keyword token">in</SPAN> lst_todo<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist <SPAN class="operator token">=</SPAN> GetDistance<SPAN class="punctuation token">(</SPAN>end_pnt<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> end_pnt<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">,</SPAN> pnt<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist <SPAN class="operator token"><</SPAN> tolerance<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist <SPAN class="operator token"><</SPAN> dist_min<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> dist
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> oid
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> <SPAN class="string token">"end"</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> oid_min<SPAN class="punctuation token">,</SPAN> type_min<SPAN class="punctuation token">,</SPAN> dist_min

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">GetDistance</SPAN><SPAN class="punctuation token">(</SPAN>x1<SPAN class="punctuation token">,</SPAN> y1<SPAN class="punctuation token">,</SPAN> x2<SPAN class="punctuation token">,</SPAN> y2<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">import</SPAN> math
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> math<SPAN class="punctuation token">.</SPAN>hypot<SPAN class="punctuation token">(</SPAN>x2<SPAN class="operator token">-</SPAN>x1<SPAN class="punctuation token">,</SPAN> y2<SPAN class="operator token">-</SPAN>y1<SPAN class="punctuation token">)</SPAN>

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">CreateDictionaryStartOrEndPoints</SPAN><SPAN class="punctuation token">(</SPAN>dct_data<SPAN class="punctuation token">,</SPAN> start_or_end<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; dct_pnts <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> oid<SPAN class="punctuation token">,</SPAN> lst <SPAN class="keyword token">in</SPAN> dct_data<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; polyline <SPAN class="operator token">=</SPAN> lst<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> start_or_end <SPAN class="operator token">==</SPAN> <SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> polyline<SPAN class="punctuation token">.</SPAN>firstPoint
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> polyline<SPAN class="punctuation token">.</SPAN>lastPoint
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> dct_pnts

<SPAN class="keyword token">if</SPAN> __name__ <SPAN class="operator token">==</SPAN> <SPAN class="string token">'__main__'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; main<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>
<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

All comments

XanderBakker

The are many ways to validate if there are segments with the wrong direction. For instance manually, by applying a symbology that includes line decoration:

Which will show you where you have problems in your data:

You can also create end and start points in separate featureclasses form the lines using Feature Vertices to Points:

And symbolize those:

You can also apply hatching (About displaying hatches—Help | ArcGIS Desktop ) to validate the M values of the road (are they continuous):

Or you can analyze the start and end featureclasses with a Generate Near Table and validate where you have start points without end point (although you would need to exclude the start and end points of a route.

Or create routes to see if the routes makes sense when you apply the M values of the road segments.

JayantaPoddar

Symbology > Arrow at End.

ZenekS_

Thank you for your answers and screenshots. Of course these solutions are good and I can apply them to my dataset.

But how to calculate (maybe in Python) distance for end point and start point of subsequent segments in every road_number (but not for first and last segments – only the middle segments) ? When the distance is more than 0 – it will be an error.

XanderBakker

You can script this, but this can get pretty complex. I did something in the past. Let me dig into my archive and see if I can share some code.

XanderBakker

See below some sample code that could be a start:

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">main</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">import</SPAN> arcpy

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># input fc and name of field containing route name</SPAN>
&nbsp;&nbsp;&nbsp; fc <SPAN class="operator token">=</SPAN> r<SPAN class="string token">'C:\GeoNet\RoadDirection\test.gdb\roads_m'</SPAN>
&nbsp;&nbsp;&nbsp; fld_name <SPAN class="operator token">=</SPAN> <SPAN class="string token">'RouteName'</SPAN>
&nbsp;&nbsp;&nbsp; tolerance <SPAN class="operator token">=</SPAN> <SPAN class="number token">1</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># sr</SPAN>
&nbsp;&nbsp;&nbsp; sr <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>spatialReference

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># create dictionary of data</SPAN>
&nbsp;&nbsp;&nbsp; dct_routes <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; flds <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="string token">'OID@'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'SHAPE@'</SPAN><SPAN class="punctuation token">,</SPAN> fld_name<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">with</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>SearchCursor<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">,</SPAN> flds<SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> curs<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> row <SPAN class="keyword token">in</SPAN> curs<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_data <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid <SPAN class="operator token">=</SPAN> row<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; polyline <SPAN class="operator token">=</SPAN> row<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; route_name <SPAN class="operator token">=</SPAN> row<SPAN class="punctuation token">[</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> route_name <SPAN class="keyword token">in</SPAN> dct_routes<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_data <SPAN class="operator token">=</SPAN> dct_routes<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_data<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> polyline
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_data<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> polyline
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_routes<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> dct_data

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># determnine first segment of route based on minimum M value</SPAN>
&nbsp;&nbsp;&nbsp; dct_possible_errors <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> route_name<SPAN class="punctuation token">,</SPAN> dct_data <SPAN class="keyword token">in</SPAN> sorted<SPAN class="punctuation token">(</SPAN>dct_routes<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"dct_possible_errors"</SPAN><SPAN class="punctuation token">,</SPAN> dct_possible_errors
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid <SPAN class="operator token">=</SPAN> GetFirstSegmentOfRouteOnMvalue<SPAN class="punctuation token">(</SPAN>dct_data<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - GetFirstSegmentOfRouteOnMvalue:"</SPAN><SPAN class="punctuation token">,</SPAN> route_name<SPAN class="punctuation token">,</SPAN> oid
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_processed <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_start_pnts <SPAN class="operator token">=</SPAN> CreateDictionaryStartOrEndPoints<SPAN class="punctuation token">(</SPAN>dct_data<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_end_pnts <SPAN class="operator token">=</SPAN> CreateDictionaryStartOrEndPoints<SPAN class="punctuation token">(</SPAN>dct_data<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"end"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> route_name
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - len:"</SPAN><SPAN class="punctuation token">,</SPAN> len<SPAN class="punctuation token">(</SPAN>dct_data<SPAN class="punctuation token">.</SPAN>keys<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - oid:"</SPAN><SPAN class="punctuation token">,</SPAN> oid

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># start connecting segments</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_todo <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>o <SPAN class="keyword token">for</SPAN> o <SPAN class="keyword token">in</SPAN> dct_data<SPAN class="punctuation token">.</SPAN>keys<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">if</SPAN> <SPAN class="operator token">not</SPAN> o <SPAN class="keyword token">in</SPAN> lst_processed<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">while</SPAN> len<SPAN class="punctuation token">(</SPAN>lst_todo<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">!=</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; start_pnt <SPAN class="operator token">=</SPAN> dct_start_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end_pnt <SPAN class="operator token">=</SPAN> dct_end_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - lst_processed:"</SPAN><SPAN class="punctuation token">,</SPAN> lst_processed
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - lst_todo:"</SPAN><SPAN class="punctuation token">,</SPAN> lst_todo

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_near_end<SPAN class="punctuation token">,</SPAN> dist_near_end<SPAN class="punctuation token">,</SPAN> type_near_end <SPAN class="operator token">=</SPAN> FindPointsNearEnd<SPAN class="punctuation token">(</SPAN>oid<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"end"</SPAN><SPAN class="punctuation token">,</SPAN> dct_start_pnts<SPAN class="punctuation token">,</SPAN> dct_end_pnts<SPAN class="punctuation token">,</SPAN> lst_processed<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - FindPointsNearStartorEnd-end&nbsp; :"</SPAN><SPAN class="punctuation token">,</SPAN> oid_near_end<SPAN class="punctuation token">,</SPAN> dist_near_end<SPAN class="punctuation token">,</SPAN> type_near_end
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_near_start<SPAN class="punctuation token">,</SPAN> dist_near_start<SPAN class="punctuation token">,</SPAN> type_near_start <SPAN class="operator token">=</SPAN> FindPointsNearStart<SPAN class="punctuation token">(</SPAN>oid<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">,</SPAN> dct_start_pnts<SPAN class="punctuation token">,</SPAN> dct_end_pnts<SPAN class="punctuation token">,</SPAN> lst_processed<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - FindPointsNearStartorEnd-start:"</SPAN><SPAN class="punctuation token">,</SPAN> oid_near_start<SPAN class="punctuation token">,</SPAN> dist_near_start<SPAN class="punctuation token">,</SPAN> type_near_start

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; from_part <SPAN class="operator token">=</SPAN> <SPAN class="string token">"end"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; to_part <SPAN class="operator token">=</SPAN> <SPAN class="string token">"not set"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist_near_start <SPAN class="operator token"><</SPAN> tolerance<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"&nbsp;&nbsp; - connect to start is option..."</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"&nbsp;&nbsp; - oid to connect to:"</SPAN><SPAN class="punctuation token">,</SPAN> oid_near_start
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; to_part <SPAN class="operator token">=</SPAN> <SPAN class="string token">"start"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"ERROR possible flip line case"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist_near_end <SPAN class="operator token"><</SPAN> tolerance<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"&nbsp;&nbsp; - connect to end is option..."</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"&nbsp;&nbsp; - oid to connect to:"</SPAN><SPAN class="punctuation token">,</SPAN> oid_near_end
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; to_part <SPAN class="operator token">=</SPAN> <SPAN class="string token">"end"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"&nbsp;&nbsp;&nbsp; - from - to: "</SPAN><SPAN class="punctuation token">,</SPAN> from_part<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">" - "</SPAN><SPAN class="punctuation token">,</SPAN> to_part

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> to_part <SPAN class="operator token">==</SPAN> <SPAN class="string token">"end"</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"from_part is start, possible ERROR flip case!"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_todo<SPAN class="punctuation token">.</SPAN>remove<SPAN class="punctuation token">(</SPAN>oid_near_end<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_processed<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>oid_near_end<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid <SPAN class="operator token">=</SPAN> oid_near_end
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - ERROR is end, Flip!:"</SPAN><SPAN class="punctuation token">,</SPAN> oid_near_end
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> route_name <SPAN class="keyword token">in</SPAN> dct_possible_errors<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; errors <SPAN class="operator token">=</SPAN> dct_possible_errors<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; errors<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>oid<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_possible_errors<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> errors
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_possible_errors<SPAN class="punctuation token">[</SPAN>route_name<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - added:"</SPAN><SPAN class="punctuation token">,</SPAN> route_name<SPAN class="punctuation token">,</SPAN> oid
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> to_part <SPAN class="operator token">==</SPAN> <SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"to_part is end, OK"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_todo<SPAN class="punctuation token">.</SPAN>remove<SPAN class="punctuation token">(</SPAN>oid_near_start<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_processed<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>oid_near_start<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid <SPAN class="operator token">=</SPAN> oid_near_start
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - OK is start&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; :"</SPAN><SPAN class="punctuation token">,</SPAN> oid_near_start
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">"no candidates available in tolerance"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> <SPAN class="string token">" - still to do:"</SPAN><SPAN class="punctuation token">,</SPAN> lst_todo
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_todo <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>


&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> route_name<SPAN class="punctuation token">,</SPAN> errors <SPAN class="keyword token">in</SPAN> dct_possible_errors<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> len<SPAN class="punctuation token">(</SPAN>errors<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">></SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN> route_name<SPAN class="punctuation token">,</SPAN> errors

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">FindPointsNearStart</SPAN><SPAN class="punctuation token">(</SPAN>oid<SPAN class="punctuation token">,</SPAN> start_or_end<SPAN class="punctuation token">,</SPAN> dct_start_pnts<SPAN class="punctuation token">,</SPAN> dct_end_pnts<SPAN class="punctuation token">,</SPAN> lst_exclude<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> start_or_end <SPAN class="operator token">==</SPAN> <SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> dct_start_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> dct_end_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>

&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> <SPAN class="number token">9999</SPAN>
&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> <SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN>
&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> <SPAN class="string token">"not set"</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># determine distance bewteen point and start of others</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> oid_i<SPAN class="punctuation token">,</SPAN> pnt_i <SPAN class="keyword token">in</SPAN> dct_start_pnts<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> <SPAN class="operator token">not</SPAN> oid_i <SPAN class="keyword token">in</SPAN> lst_exclude<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_i <SPAN class="operator token">=</SPAN> GetDistance<SPAN class="punctuation token">(</SPAN>pnt<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">,</SPAN> pnt_i<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt_i<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist_i <SPAN class="operator token"><</SPAN> dist_min<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> dist_i
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> oid_i
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> <SPAN class="string token">"start"</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> oid_min<SPAN class="punctuation token">,</SPAN> dist_min<SPAN class="punctuation token">,</SPAN> type_min

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">FindPointsNearEnd</SPAN><SPAN class="punctuation token">(</SPAN>oid<SPAN class="punctuation token">,</SPAN> start_or_end<SPAN class="punctuation token">,</SPAN> dct_start_pnts<SPAN class="punctuation token">,</SPAN> dct_end_pnts<SPAN class="punctuation token">,</SPAN> lst_exclude<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> start_or_end <SPAN class="operator token">==</SPAN> <SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> dct_start_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> dct_end_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>

&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> <SPAN class="number token">9999</SPAN>
&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> <SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN>
&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> <SPAN class="string token">"not set"</SPAN>

&nbsp;&nbsp; <SPAN class="comment token"># determine distance bewteen point and start of others</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> oid_i<SPAN class="punctuation token">,</SPAN> pnt_i <SPAN class="keyword token">in</SPAN> dct_end_pnts<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> <SPAN class="operator token">not</SPAN> oid_i <SPAN class="keyword token">in</SPAN> lst_exclude<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_i <SPAN class="operator token">=</SPAN> GetDistance<SPAN class="punctuation token">(</SPAN>pnt<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">,</SPAN> pnt_i<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt_i<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist_i <SPAN class="operator token"><</SPAN> dist_min<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> dist_i
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> oid_i
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> <SPAN class="string token">"end"</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> oid_min<SPAN class="punctuation token">,</SPAN> dist_min<SPAN class="punctuation token">,</SPAN> type_min



<SPAN class="keyword token">def</SPAN> <SPAN class="token function">FindPointsNearStartorEnd</SPAN><SPAN class="punctuation token">(</SPAN>oid<SPAN class="punctuation token">,</SPAN> start_or_end<SPAN class="punctuation token">,</SPAN> dct_start_pnts<SPAN class="punctuation token">,</SPAN> dct_end_pnts<SPAN class="punctuation token">,</SPAN> lst_exclude<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> start_or_end <SPAN class="operator token">==</SPAN> <SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> dct_start_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> dct_end_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN>

&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> <SPAN class="number token">9999</SPAN>
&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> <SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN>
&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> <SPAN class="string token">"not set"</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># determine distance bewteen point and start of others</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> oid_i<SPAN class="punctuation token">,</SPAN> pnt_i <SPAN class="keyword token">in</SPAN> dct_start_pnts<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> <SPAN class="operator token">not</SPAN> oid_i <SPAN class="keyword token">in</SPAN> lst_exclude<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_i <SPAN class="operator token">=</SPAN> GetDistance<SPAN class="punctuation token">(</SPAN>pnt<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">,</SPAN> pnt_i<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt_i<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist_i <SPAN class="operator token"><</SPAN> dist_min<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> dist_i
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> oid_i
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> <SPAN class="string token">"start"</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># determine distance bewteen point and start of others</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> oid_i<SPAN class="punctuation token">,</SPAN> pnt_i <SPAN class="keyword token">in</SPAN> dct_end_pnts<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> <SPAN class="operator token">not</SPAN> oid_i <SPAN class="keyword token">in</SPAN> lst_exclude<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_i <SPAN class="operator token">=</SPAN> GetDistance<SPAN class="punctuation token">(</SPAN>pnt<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">,</SPAN> pnt_i<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt_i<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist_i <SPAN class="operator token"><</SPAN> dist_min<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist_min <SPAN class="operator token">=</SPAN> dist_i
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> oid_i
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type_min <SPAN class="operator token">=</SPAN> <SPAN class="string token">"end"</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> oid_min<SPAN class="punctuation token">,</SPAN> dist_min<SPAN class="punctuation token">,</SPAN> type_min

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">GetDistance</SPAN><SPAN class="punctuation token">(</SPAN>x1<SPAN class="punctuation token">,</SPAN> y1<SPAN class="punctuation token">,</SPAN> x2<SPAN class="punctuation token">,</SPAN> y2<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">import</SPAN> math
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> math<SPAN class="punctuation token">.</SPAN>hypot<SPAN class="punctuation token">(</SPAN>x2<SPAN class="operator token">-</SPAN>x1<SPAN class="punctuation token">,</SPAN> y2<SPAN class="operator token">-</SPAN>y1<SPAN class="punctuation token">)</SPAN>

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">CreateDictionaryStartOrEndPoints</SPAN><SPAN class="punctuation token">(</SPAN>dct_data<SPAN class="punctuation token">,</SPAN> start_or_end<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; dct_pnts <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> oid<SPAN class="punctuation token">,</SPAN> polyline <SPAN class="keyword token">in</SPAN> dct_data<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> start_or_end <SPAN class="operator token">==</SPAN> <SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> polyline<SPAN class="punctuation token">.</SPAN>firstPoint
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dct_pnts<SPAN class="punctuation token">[</SPAN>oid<SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">=</SPAN> polyline<SPAN class="punctuation token">.</SPAN>lastPoint
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> dct_pnts

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">GetFirstSegmentOfRouteOnMvalue</SPAN><SPAN class="punctuation token">(</SPAN>dct_data<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; m_min <SPAN class="operator token">=</SPAN> <SPAN class="number token">99999</SPAN>
&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> <SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> oid<SPAN class="punctuation token">,</SPAN> polyline <SPAN class="keyword token">in</SPAN> dct_data<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> part <SPAN class="keyword token">in</SPAN> polyline<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> pnt <SPAN class="keyword token">in</SPAN> part<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; m <SPAN class="operator token">=</SPAN> pnt<SPAN class="punctuation token">.</SPAN>M
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> m <SPAN class="operator token"><</SPAN> m_min<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; m_min <SPAN class="operator token">=</SPAN> m
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oid_min <SPAN class="operator token">=</SPAN> oid
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> oid_min

<SPAN class="keyword token">if</SPAN> __name__ <SPAN class="operator token">==</SPAN> <SPAN class="string token">'__main__'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; main<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

It threw as result that feature with OID 5, route "B" was in the wrong direction (although a lot of testing is still required):

Before you start to use this script, please keep the following in mind:

This code selects the first segment (feature) based on the minimum M value
The first feature defined the direction, if you have 10 segments in a route and the first points in a certain direction and the rest in the other, all 9 segments would be identified as "wrong"
If you would like to define the correct direction based on the majority of the segments, you should determine if this is on number of features or combined length.
There can be infinite exceptions that could yield undesired results

ZenekS_

Thank you very much for your engagement and time you have spent on this case. I will apply and test the code. I will allow myself to contact you again in case of further questions.

ZenekS_

I have done some test with your code on my example data. I have attached the data. You will find that:

in my example data every segment of a given road must start with M value =0,
the right direction is the direction of the first segment [Segment_ID] of a given road, that is the minimum value (number) in field [Segment_ID] for a given road number [RouteName]

Below screenshot of my example roads:

The right direction for whole road indicates:

Road A – segment 1
Road B – segment 4
Road C – segment 7

So script should report errors:

Road A, Segment 2 (A, 2)
Road B, Segment 6 (B, 6)
Road C, Segment 8, 9, 10 (C,8; C,9; C,10)

For now, code indicates errors only at segment (A,2).

Please for further help.

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