After running the script below the "point" layer that is created does not have any features and of course no angles calculated. Any ideas on why this might be would be appreciated. Thanks, Jim import math 02 . . . . sr = arcpy . Describe ( "Z77" ) . spatialReference 03 . . . . arcpy . CreateFeatureclass_management ( 'in_memory' , 'points' , "POINT" , spatial_reference = sr ) 04 . . . . arcpy . AddField_management ( 'points' , 'Angle' , "DOUBLE" ) 05 . . . . insCur = arcpy . da . InsertCursor ( "points" , ( 'SHAPE@' , 'Angle' ) ) 06 . . . . with arcpy . da . SearchCursor ( "Z77" , [ "SHAPE@" ] ) as cursor : 07 . . . . for row in cursor : 08 . . . . for part in row [ 0 ] : 09 . . . . pt_count = 1 10 . . . . for pnt in part : 11 . . . . pnt = arcpy . PointGeometry ( pnt , sr ) 12 . . . . if pt_count > 1 : 13 . . . . if pt_count > 2 : 14 . . . . distAB = oneBack . distanceTo ( twoBack ) 15 . . . . distBC = pnt . distanceTo ( oneBack ) 16 . . . . distAC = pnt . distanceTo ( twoBack ) 17 . . . . angB = math . degrees ( math . acos ( ( ( ( distAB * distAB ) + ( distBC * distBC ) ) - ( distAC * distAC ) ) / ( 2 * distAB * distBC ) ) ) 18 . . . . insCur . insertRow ( ( oneBack , angB ) ) 19 . . . . twoBack = oneBack 20 . . . . oneBack = pnt 21 . . . . pt_count += 1 22 . . . . del insCur

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deflection angle script

JimFritz

After running the script below the "point" layer that is created does not have any features and of course no angles calculated. Any ideas on why this might be would be appreciated.

Thanks,

Jim

<SPAN class="keyword token">import</SPAN> math&nbsp; 
<SPAN class="number token">02</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN> sr <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Z77"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>spatialReference&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">03</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>CreateFeatureclass_management<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'in_memory'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'points'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">"POINT"</SPAN><SPAN class="punctuation token">,</SPAN>spatial_reference<SPAN class="operator token">=</SPAN>sr<SPAN class="punctuation token">)</SPAN>&nbsp; 
<SPAN class="number token">04</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>AddField_management<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'points'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Angle'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">"DOUBLE"</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp; 
<SPAN class="number token">05</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN> insCur <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>InsertCursor<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"points"</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">'SHAPE@'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Angle'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp; 
<SPAN class="number token">06</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN> <SPAN class="keyword token">with</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>SearchCursor<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Z77"</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">"SHAPE@"</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> cursor<SPAN class="punctuation token">:</SPAN>&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">07</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN>&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> row <SPAN class="keyword token">in</SPAN> cursor<SPAN class="punctuation token">:</SPAN>&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">08</SPAN><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">for</SPAN> part <SPAN class="keyword token">in</SPAN> row<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">09</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp; pt_count <SPAN class="operator token">=</SPAN> <SPAN class="number token">1</SPAN>&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">10</SPAN><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;&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; 
<SPAN class="number token">11</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pnt <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>PointGeometry<SPAN class="punctuation token">(</SPAN>pnt<SPAN class="punctuation token">,</SPAN>sr<SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">12</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> pt_count <SPAN class="operator token">></SPAN> <SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN>&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">13</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> pt_count <SPAN class="operator token">></SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">:</SPAN>&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">14</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; distAB <SPAN class="operator token">=</SPAN> oneBack<SPAN class="punctuation token">.</SPAN>distanceTo<SPAN class="punctuation token">(</SPAN>twoBack<SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">15</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; distBC <SPAN class="operator token">=</SPAN> pnt<SPAN class="punctuation token">.</SPAN>distanceTo<SPAN class="punctuation token">(</SPAN>oneBack<SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">16</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; distAC <SPAN class="operator token">=</SPAN> pnt<SPAN class="punctuation token">.</SPAN>distanceTo<SPAN class="punctuation token">(</SPAN>twoBack<SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">17</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; angB <SPAN class="operator token">=</SPAN> math<SPAN class="punctuation token">.</SPAN>degrees<SPAN class="punctuation token">(</SPAN>math<SPAN class="punctuation token">.</SPAN>acos<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>distAB<SPAN class="operator token">*</SPAN>distAB<SPAN class="punctuation token">)</SPAN><SPAN class="operator token">+</SPAN><SPAN class="punctuation token">(</SPAN>distBC<SPAN class="operator token">*</SPAN>distBC<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="operator token">-</SPAN><SPAN class="punctuation token">(</SPAN>distAC<SPAN class="operator token">*</SPAN>distAC<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="operator token">/</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="number token">2</SPAN><SPAN class="operator token">*</SPAN>distAB<SPAN class="operator token">*</SPAN>distBC<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp; 
<SPAN class="number token">18</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; insCur<SPAN class="punctuation token">.</SPAN>insertRow<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>oneBack<SPAN class="punctuation token">,</SPAN>angB<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp; 
<SPAN class="number token">19</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; twoBack <SPAN class="operator token">=</SPAN> oneBack&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">20</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; oneBack <SPAN class="operator token">=</SPAN> pnt&nbsp;&nbsp;&nbsp; 
<SPAN class="number token">21</SPAN><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pt_count <SPAN class="operator token">+=</SPAN> <SPAN class="number token">1</SPAN>&nbsp; 
<SPAN class="number token">22</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN> <SPAN class="keyword token">del</SPAN> insCur&nbsp; 
<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>

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Accepted answers

JimFritz

Thanks, I'll double-check the indentation issues when pasting in the code to the python window.

All comments

JimFritz

Darrin,

Just to make sure I understand the "no pnts in part, or no parts in row[0] " is in reference to the multi-part polyline layer (Z77_UTM13splitatpoint)??

Thanks,

Jim

JimFritz

Hmm, just noticed that prior to running script there was attribute field called "angle" and populated from some earlier tinkering. I just deleted it so I will re-run the script.

I really appreciate the help! I see that the script does work so just have to keep plugging away at it. I don't have much more time today but will pick up again tomorrow.

Regards,

Jim

DarrenWiens2

That means there's either no pnts in part, or no parts in row[0], or no rows in cursor.

JimFritz

print statements Darren,

Note nothing returned.

Thanks for the help!!

Jim

DarrenWiens2

The line(s) must be multi-part (i.e. many line segments joined into one feature).

JimFritz

Darrin,

Thanks, I will try the print statement remedy. Also, can the input "lines" layer be either a dissolved polyline feature or a multi-part polyline feature?

Jim

DarrenWiens2

Add some print statements, particularly before you try to insert, to ensure the values are what you expect. If not, or if the print never executes, back up and figure out where it's failing.

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