topic Finding Collinear and Intersection Errors in ArcObjects SDK Questions https://community.esri.com/t5/arcobjects-sdk-questions/finding-collinear-and-intersection-errors/m-p/252104#M6489 <HTML><HEAD></HEAD><BODY><P>I have building polygonZM shape file, as per customer requirements need to find and fix below topological errors.</P><P></P><UL><LI>Collinear errors (if any building edge have more than 2 vertex )</LI></UL><P>&nbsp; &nbsp;&nbsp;<IMG class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/347307_pastedImage_1.png" style="width: auto; height: auto;" /></P><UL><LI>Missing vertex at every intersection of building</LI></UL><P><IMG class="image-2 jive-image" src="https://community.esri.com/legacyfs/online/347308_pastedImage_2.png" style="width: 315px; height: 235px;" /></P><P>I would like to find these errors programatically and having more than 10 lak polygons hence, requesting an efficient algorithm either .net or python.</P><P></P><P>Thanks and Regards,</P><P>Chandra Sekhar Guda.</P></BODY></HTML> Thu, 20 Apr 2017 16:19:07 GMT chandrasekhar_reddyguda 2017-04-20T16:19:07Z Finding Collinear and Intersection Errors https://community.esri.com/t5/arcobjects-sdk-questions/finding-collinear-and-intersection-errors/m-p/252104#M6489 <HTML><HEAD></HEAD><BODY><P>I have building polygonZM shape file, as per customer requirements need to find and fix below topological errors.</P><P></P><UL><LI>Collinear errors (if any building edge have more than 2 vertex )</LI></UL><P>&nbsp; &nbsp;&nbsp;<IMG class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/347307_pastedImage_1.png" style="width: auto; height: auto;" /></P><UL><LI>Missing vertex at every intersection of building</LI></UL><P><IMG class="image-2 jive-image" src="https://community.esri.com/legacyfs/online/347308_pastedImage_2.png" style="width: 315px; height: 235px;" /></P><P>I would like to find these errors programatically and having more than 10 lak polygons hence, requesting an efficient algorithm either .net or python.</P><P></P><P>Thanks and Regards,</P><P>Chandra Sekhar Guda.</P></BODY></HTML> Thu, 20 Apr 2017 16:19:07 GMT https://community.esri.com/t5/arcobjects-sdk-questions/finding-collinear-and-intersection-errors/m-p/252104#M6489 chandrasekhar_reddyguda 2017-04-20T16:19:07Z Re: Finding Collinear and Intersection Errors https://community.esri.com/t5/arcobjects-sdk-questions/finding-collinear-and-intersection-errors/m-p/252105#M6490 <HTML><HEAD></HEAD><BODY><P>An idea, would be to identify touching polygons then turn the polygons into point collections and test if any of the points are the same. This would identify if no vertices are shared or they share X number of vertices.</P><P></P><P>Suggest you look at Interfaces IPointCollection,IPoint and&nbsp;IRelationalOperator</P></BODY></HTML> Tue, 25 Apr 2017 11:00:58 GMT https://community.esri.com/t5/arcobjects-sdk-questions/finding-collinear-and-intersection-errors/m-p/252105#M6490 DuncanHornby 2017-04-25T11:00:58Z