I'm trying to split a polygon by multipart polyline (created from multiple polylines with GeometryEngine.Union) using GeometryEngine.Cut method expecting multiple (more than 2) geometries as the result. But I get empty collection... In ArcObjects I can do this easily with ITopologicalOperator4.Cut2 method. Test data is attached – Data.gdb.zip. If you execute this code you'll get an empty collection as the result of GeometryEngine.Cut method. using ( var geodatabase = new Geodatabase ( "Data.gdb" ) ) { // Construct unified line to cut by var lines = new List Polyline > ( ) ; using ( var linesFeatureClass = geodatabase . OpenDataset FeatureClass > ( "Lines" ) ) using ( var linesCursor = linesFeatureClass . Search ( ) ) { while ( linesCursor . MoveNext ( ) ) { var polyline = GeometryEngine . SimplifyAsFeature ( ( ( Feature ) linesCursor . Current ) . GetShape ( ) , true ) as Polyline ; lines . Add ( polyline ) ; } } var unifiedLine = GeometryEngine . SimplifyAsFeature ( GeometryEngine . Union ( lines ) , true ) as Polyline ; // Get polygon to be cut Polygon polygon = null ; using ( var polygonsFeatureClass = geodatabase . OpenDataset FeatureClass > ( "Building_pol" ) ) using ( var polygonCursor = polygonsFeatureClass . Search ( ) ) { while ( polygonCursor . MoveNext ( ) ) { polygon = GeometryEngine . SimplifyAsFeature ( ( ( Feature ) polygonCursor . Current ) . GetShape ( ) , true ) as Polygon ; break ; } } // Cut polygon by unified line var parts = GeometryEngine . Cut ( polygon , unifiedLine ) ; // parts will be empty collection } Input data: Expected result: Data.gdb.zip Clip_200.jpg call to action.png

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GeometryEngine.Cut doesn't split into multiple geometries

MaxMax2

I'm trying to split a polygon by multipart polyline (created from multiple polylines with GeometryEngine.Union) using GeometryEngine.Cut method expecting multiple (more than 2) geometries as the result. But I get empty collection... In ArcObjects I can do this easily with ITopologicalOperator4.Cut2 method.

Test data is attached – Data.gdb.zip. If you execute this code you'll get an empty collection as the result of GeometryEngine.Cut method.

<SPAN class="keyword token">using</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> geodatabase <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Geodatabase</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Data.gdb"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
<SPAN class="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="comment token">// Construct unified line to cut by</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">var</SPAN> lines <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">List</SPAN><SPAN class="operator token"><</SPAN>Polyline<SPAN class="operator token">></SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">using</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> linesFeatureClass <SPAN class="operator token">=</SPAN> geodatabase<SPAN class="punctuation token">.</SPAN>OpenDataset<SPAN class="operator token"><</SPAN>FeatureClass<SPAN class="operator token">></SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Lines"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">using</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> linesCursor <SPAN class="operator token">=</SPAN> linesFeatureClass<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Search</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">while</SPAN> <SPAN class="punctuation token">(</SPAN>linesCursor<SPAN class="punctuation token">.</SPAN><SPAN class="token function">MoveNext</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="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">var</SPAN> polyline <SPAN class="operator token">=</SPAN> GeometryEngine<SPAN class="punctuation token">.</SPAN><SPAN class="token function">SimplifyAsFeature</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>Feature<SPAN class="punctuation token">)</SPAN>linesCursor<SPAN class="punctuation token">.</SPAN>Current<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">GetShape</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> Polyline<SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lines<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Add</SPAN><SPAN class="punctuation token">(</SPAN>polyline<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">}</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">var</SPAN> unifiedLine <SPAN class="operator token">=</SPAN> GeometryEngine<SPAN class="punctuation token">.</SPAN><SPAN class="token function">SimplifyAsFeature</SPAN><SPAN class="punctuation token">(</SPAN>GeometryEngine<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Union</SPAN><SPAN class="punctuation token">(</SPAN>lines<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> Polyline<SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; <SPAN class="comment token">// Get polygon to be cut</SPAN>

&nbsp;&nbsp;&nbsp; Polygon polygon <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">null</SPAN><SPAN class="punctuation token">;</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">using</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> polygonsFeatureClass <SPAN class="operator token">=</SPAN> geodatabase<SPAN class="punctuation token">.</SPAN>OpenDataset<SPAN class="operator token"><</SPAN>FeatureClass<SPAN class="operator token">></SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Building_pol"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">using</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> polygonCursor <SPAN class="operator token">=</SPAN> polygonsFeatureClass<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Search</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">while</SPAN> <SPAN class="punctuation token">(</SPAN>polygonCursor<SPAN class="punctuation token">.</SPAN><SPAN class="token function">MoveNext</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="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; polygon <SPAN class="operator token">=</SPAN> GeometryEngine<SPAN class="punctuation token">.</SPAN><SPAN class="token function">SimplifyAsFeature</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>Feature<SPAN class="punctuation token">)</SPAN>polygonCursor<SPAN class="punctuation token">.</SPAN>Current<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">GetShape</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> Polygon<SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">break</SPAN><SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">}</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">}</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="comment token">// Cut polygon by unified line</SPAN>
&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">var</SPAN> parts <SPAN class="operator token">=</SPAN> GeometryEngine<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Cut</SPAN><SPAN class="punctuation token">(</SPAN>polygon<SPAN class="punctuation token">,</SPAN> unifiedLine<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN> <SPAN class="comment token">// parts will be empty collection</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>

Input data:

Expected result:

Data.gdb.zip

Clip_200.jpg

call to action.png

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Accepted answers

NarelleChedzey

Hi Max,

Yes, there was a bug with the GeometryEngine Cut method. We have fixed it and verified with the dataset you provided. The fix will be available in the next software release. Thanks for pointing this out to us.

Narelle

All comments

MaxMax2

Hi Narelle,

I confirm, in 2.0 the bug is fixed. Thank you.

NarelleChedzey

Hi Max,

Narelle

MaxMax2

nchedzey-esristaff‌, can you confirm that the bug exists?

MaxMax2

Hi Narelle,

I've updated my first post. I've added sample data and test code along with images showing input data and expected result.

NarelleChedzey

Hi Max,

Actually if you have some test data and it's easy to provide that would be helpful. The more real world data scenarios we have for test cases the better.

Narelle

MaxMax2

Hi Narelle,

Thanks for reply. Let me know if you need test data or more details.

NarelleChedzey

Hi Max,

Thanks for your post. We're investigating - looks like a bug. We'll fix for the next release.

Regards

Narelle

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