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How can I transform a polygon into a point?

Hi!

I have a shapefile with polygons, but I want to transform these objects into points (example: I have the polygons with are the physical borders of a subset of school, I want to have point rather than the polygon of the building).

What can I use?

- feature to points doesn't suit me because it creates a new output, while I would like to keep the information I have in my original shapefile.

-I tried add geometry attributes, it runs successfully, but it doesn't not add the geometry attributes!!! Do you know why it happens?

Do you have other solutions?

Thank you!!

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DanPatterson_Retired

You will need to produce a new output of some kind. One of the easiest would be to calculate the X, Y (aka centroid) value for the center, then add it back in to the dataframe as an event layer saving to a point featureclass if you want

Thank you. Do you know why the add geometry attributesi is not woking? the tool runs successfully, but then in the table it doesn't add the geometry attributes!!!

DanPatterson_Retired

show a screen grab of the table's first few rows. There is a Shape field isn't there?. There should be two new fields if you specified the centroid/center X and Y values

JayantaPoddar

Feature to Point (Data Management) should work for you (Requires ArcGIS Desktop Advanced license). The attributes of the input features will be maintained in the output feature class. In case of multipart polygon, the centroid might lie outside the polygon.

I will say "Give it a try".

XanderBakker

In case you do not have access to an Advance license you could create a tool that does this for you with a Basic license.(sorry for the Spanish interface)

first parameter is the polygon featureclass
second parameter is the output point featureclass
third parameter is the method

The code beneath looks like this:

<SPAN class="comment token">#-------------------------------------------------------------------------------</SPAN>
<SPAN class="comment token"># Name:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; FeatureToPoint.py</SPAN>
<SPAN class="comment token"># Purpose:&nbsp;&nbsp;&nbsp;&nbsp; Convertir feature a punto</SPAN>
<SPAN class="comment token">#</SPAN>
<SPAN class="comment token"># Author:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; xbakker</SPAN>
<SPAN class="comment token">#</SPAN>
<SPAN class="comment token"># Created:&nbsp;&nbsp;&nbsp;&nbsp; 02/03/2015</SPAN>
<SPAN class="comment token">#-------------------------------------------------------------------------------</SPAN>
<SPAN class="keyword token">import</SPAN> arcpy
<SPAN class="keyword token">import</SPAN> os
<SPAN class="keyword token">import</SPAN> math

<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="comment token"># parameters</SPAN>
&nbsp;&nbsp;&nbsp; fc_in <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterAsText<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; fc_out <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterAsText<SPAN class="punctuation token">(</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; method <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterAsText<SPAN class="punctuation token">(</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="comment token"># CENTROID, INSIDE</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># fld para poder hacer el join con la entrada</SPAN>
&nbsp;&nbsp;&nbsp; fld_oid_in <SPAN class="operator token">=</SPAN> <SPAN class="string token">"ORIG_FID"</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># geometria de salida</SPAN>
&nbsp;&nbsp;&nbsp; geomtype <SPAN class="operator token">=</SPAN> <SPAN class="string token">"POINT"</SPAN>
&nbsp;&nbsp;&nbsp; sr <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>fc_in<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>spatialReference

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># recreate fc_out based on fc_lines (in)</SPAN>
&nbsp;&nbsp;&nbsp; ws_name<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; createFeatureClass<SPAN class="punctuation token">(</SPAN>fc_out<SPAN class="punctuation token">,</SPAN> fc_in<SPAN class="punctuation token">,</SPAN> geomtype<SPAN class="punctuation token">,</SPAN> sr<SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># add OID field</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_oid_in<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"LONG"</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># cursors:</SPAN>
&nbsp;&nbsp;&nbsp; cnt <SPAN class="operator token">=</SPAN> <SPAN class="number token">0</SPAN>
&nbsp;&nbsp;&nbsp; flds_out <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="string token">"SHAPE@"</SPAN><SPAN class="punctuation token">,</SPAN> fld_oid_in<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>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; flds_in <SPAN class="operator token">=</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"SHAPE@"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"OID@"</SPAN><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_in<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; feat <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;&nbsp;&nbsp;&nbsp;&nbsp; oid <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;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># get point based on method</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> getPoint<SPAN class="punctuation token">(</SPAN>feat<SPAN class="punctuation token">,</SPAN> method<SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># store point</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; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Procesando feature: {0}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>cnt<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; curs_out<SPAN class="punctuation token">.</SPAN>insertRow<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>pnt<SPAN class="punctuation token">,</SPAN> oid<SPAN class="punctuation token">,</SPAN> <SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"{0} features procesados..."</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>cnt<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>


<SPAN class="keyword token">def</SPAN> <SPAN class="token function">getPoint</SPAN><SPAN class="punctuation token">(</SPAN>feat<SPAN class="punctuation token">,</SPAN> method<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""Convertir feature a punto dependiendo del metodo y tipo de geometria"""</SPAN>

&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> None
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> method <SPAN class="operator token">==</SPAN> <SPAN class="string token">"CENTROID"</SPAN> <SPAN class="operator token">and</SPAN> feat<SPAN class="punctuation token">.</SPAN>type <SPAN class="operator token">==</SPAN> <SPAN class="string token">'polygon'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> feat<SPAN class="punctuation token">.</SPAN>centroid

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> method <SPAN class="operator token">==</SPAN> <SPAN class="string token">"CENTROID"</SPAN> <SPAN class="operator token">and</SPAN> feat<SPAN class="punctuation token">.</SPAN>type <SPAN class="operator token">==</SPAN> <SPAN class="string token">'polyline'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> CentroidPolyline<SPAN class="punctuation token">(</SPAN>feat<SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> method <SPAN class="operator token">==</SPAN> <SPAN class="string token">"CENTROID"</SPAN> <SPAN class="operator token">and</SPAN> feat<SPAN class="punctuation token">.</SPAN>type <SPAN class="operator token">==</SPAN> <SPAN class="string token">'multipoint'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># average x and y coordinates of all the points in the multipoint feature</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> CentriodMultiPoint<SPAN class="punctuation token">(</SPAN>feat<SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> method <SPAN class="operator token">==</SPAN> <SPAN class="string token">"INSIDE"</SPAN> <SPAN class="operator token">and</SPAN> feat<SPAN class="punctuation token">.</SPAN>type <SPAN class="operator token">==</SPAN> <SPAN class="string token">'polygon'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> feat<SPAN class="punctuation token">.</SPAN>labelPoint

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> method <SPAN class="operator token">==</SPAN> <SPAN class="string token">"INSIDE"</SPAN> <SPAN class="operator token">and</SPAN> feat<SPAN class="punctuation token">.</SPAN>type <SPAN class="operator token">==</SPAN> <SPAN class="string token">'polyline'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pntg <SPAN class="operator token">=</SPAN> feat<SPAN class="punctuation token">.</SPAN>positionAlongLine<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0.5</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">True</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> pntg<SPAN class="punctuation token">.</SPAN>firstPoint

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> method <SPAN class="operator token">==</SPAN> <SPAN class="string token">"INSIDE"</SPAN> <SPAN class="operator token">and</SPAN> feat<SPAN class="punctuation token">.</SPAN>type <SPAN class="operator token">==</SPAN> <SPAN class="string token">'multipoint'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> InsideMultiPoint<SPAN class="punctuation token">(</SPAN>feat<SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> pnt


<SPAN class="keyword token">def</SPAN> <SPAN class="token function">InsideMultiPoint</SPAN><SPAN class="punctuation token">(</SPAN>feat<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># punto mas cercano al centroid</SPAN>
&nbsp;&nbsp;&nbsp; pnt_c <SPAN class="operator token">=</SPAN> CentriodMultiPoint<SPAN class="punctuation token">(</SPAN>feat<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; min_dist <SPAN class="operator token">=</SPAN> <SPAN class="number token">999999</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> pnt_mp <SPAN class="keyword token">in</SPAN> feat<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist <SPAN class="operator token">=</SPAN> getDistance<SPAN class="punctuation token">(</SPAN>pnt_mp<SPAN class="punctuation token">,</SPAN> pnt_c<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> dist <SPAN class="operator token"><</SPAN> min_dist<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Point<SPAN class="punctuation token">(</SPAN>pnt_mp<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt_mp<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; min_dist <SPAN class="operator token">=</SPAN> dist
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> pnt

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">CentriodMultiPoint</SPAN><SPAN class="punctuation token">(</SPAN>multipoint<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; lst_x <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; lst_y <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> pnt <SPAN class="keyword token">in</SPAN> multipoint<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_x<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>pnt<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_y<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>pnt<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Point<SPAN class="punctuation token">(</SPAN>sum<SPAN class="punctuation token">(</SPAN>lst_x<SPAN class="punctuation token">)</SPAN><SPAN class="operator token">/</SPAN>float<SPAN class="punctuation token">(</SPAN>len<SPAN class="punctuation token">(</SPAN>lst_x<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> sum<SPAN class="punctuation token">(</SPAN>lst_y<SPAN class="punctuation token">)</SPAN><SPAN class="operator token">/</SPAN>float<SPAN class="punctuation token">(</SPAN>len<SPAN class="punctuation token">(</SPAN>lst_y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>


<SPAN class="keyword token">def</SPAN> <SPAN class="token function">CentroidPolyline</SPAN><SPAN class="punctuation token">(</SPAN>polyline<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""weighted average x and y coordinates of the midpoints of all line segments in the line feature
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; where the weight of a particular midpoint is the length of the correspondent line segment"""</SPAN>
&nbsp;&nbsp;&nbsp; lst_x <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; lst_y <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; lst_length <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; prev_pnt <SPAN class="operator token">=</SPAN> None
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> pnt_part <SPAN class="keyword token">in</SPAN> part<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> prev_pnt <SPAN class="keyword token">is</SPAN> None<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># skip</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; prev_pnt <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Point<SPAN class="punctuation token">(</SPAN>pnt_part<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt_part<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">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dist <SPAN class="operator token">=</SPAN> getDistance<SPAN class="punctuation token">(</SPAN>pnt_part<SPAN class="punctuation token">,</SPAN> prev_pnt<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; line <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><SPAN class="punctuation token">[</SPAN>prev_pnt<SPAN class="punctuation token">,</SPAN> pnt_part<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; mid_pnt <SPAN class="operator token">=</SPAN> line<SPAN class="punctuation token">.</SPAN>positionAlongLine<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0.5</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">True</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_x<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>mid_pnt<SPAN class="punctuation token">.</SPAN>firstPoint<SPAN class="punctuation token">.</SPAN>X <SPAN class="operator token">*</SPAN> dist<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_y<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>mid_pnt<SPAN class="punctuation token">.</SPAN>firstPoint<SPAN class="punctuation token">.</SPAN>Y <SPAN class="operator token">*</SPAN> dist<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lst_length<SPAN class="punctuation token">.</SPAN>append<SPAN class="punctuation token">(</SPAN>dist<SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; sum_dist <SPAN class="operator token">=</SPAN> sum<SPAN class="punctuation token">(</SPAN>lst_length<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; sum_x <SPAN class="operator token">=</SPAN> sum<SPAN class="punctuation token">(</SPAN>lst_x<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; sum_y <SPAN class="operator token">=</SPAN> sum<SPAN class="punctuation token">(</SPAN>lst_y<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; x <SPAN class="operator token">=</SPAN> sum_x <SPAN class="operator token">/</SPAN> sum_dist
&nbsp;&nbsp;&nbsp; y <SPAN class="operator token">=</SPAN> sum_y <SPAN class="operator token">/</SPAN> sum_dist
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Point<SPAN class="punctuation token">(</SPAN>x<SPAN class="punctuation token">,</SPAN> y<SPAN class="punctuation token">)</SPAN>

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">createFeatureClass</SPAN><SPAN class="punctuation token">(</SPAN>fc_out<SPAN class="punctuation token">,</SPAN> fc_in<SPAN class="punctuation token">,</SPAN> geomtype<SPAN class="punctuation token">,</SPAN> sr<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; ws_name<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_name<SPAN class="punctuation token">,</SPAN> fc_name<SPAN class="punctuation token">,</SPAN> geomtype<SPAN class="punctuation token">,</SPAN> spatial_reference<SPAN class="operator token">=</SPAN>sr<SPAN class="punctuation token">)</SPAN>

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">getDistance</SPAN><SPAN class="punctuation token">(</SPAN>pnt1<SPAN class="punctuation token">,</SPAN> pnt2<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> math<SPAN class="punctuation token">.</SPAN>hypot<SPAN class="punctuation token">(</SPAN>pnt1<SPAN class="punctuation token">.</SPAN>X <SPAN class="operator token">-</SPAN> pnt2<SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> pnt1<SPAN class="punctuation token">.</SPAN>Y <SPAN class="operator token">-</SPAN> pnt2<SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN>

<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>
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I followed Dan Petterson's tip, and in the original layer (polygons) I added to new fields, and then calculated the geometry (x coordinate of the centroids, y coordinate of the centroids). Now, I would like to visualize these points on the map, how can I do that? Probably you Dan had already explained that ("then add it back in to the dataframe as an event layer saving to a point featureclass if you want"), but can you please write the passages? Thank you.

DanPatterson_Retired

Go to the File Menu, select Add Data, Add XY Data.... then specify the value for the X field (ie Longitude) and the Y field (Latitude).

Once you have the event layer, right-click on it and you can select Data, Export Data, then specify in the dialog whether you want it to go to a folder as a shapefile (don't forget the *.shp file extension) or put it into a geodatabase as a featureclass.

Hi, I tried it (also before writing the post), but it seems to me I can only select a table when using the ADD XY data. I'm using ARCGIS 10.5. I am working with a feature class containing polygons.

I fogot to ask something in my previous reply.

Summing up: I added two fields in the original feature class (contening polygons), I calculated the X and Y coordinates of the centroid, I created a XY event by going to data management tools, layers and table views, make xy event. When I open the attribute table, I find two fields with the shape, and the geometry is polygon. (see attachment). Why is that happening? I can visualize points on the map.

XanderBakker

This is very strange. When you use XY events they will always create point geometry.

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