topic Gap in TINs? in Geoprocessing Questions https://community.esri.com/t5/geoprocessing-questions/gap-in-tins/m-p/329735#M11577 <HTML><HEAD></HEAD><BODY><P>I am creating a TIN of flood elevations from a polyline feature class that has elevations along a stream network (i.e. cross sections) and and stream corridor polygon feature class to clip the TIN (i.e. clip polygon).&nbsp; I am using cross sections as "hard lines" and clip polygon as "hard clip".&nbsp; I have done this for projects many times.&nbsp; Most of the time, the resulting TIN is what I am expecting, but occasionally it has these mysterious gaps that I cannot figure out why they happen.&nbsp; The attached graphic show an example.&nbsp; Does anyone know what may be causing this?&nbsp; Ive already check that the cross sections all have elevations are single part features, and that boundary is single part features.</P><P></P><P>A couple interesting observations:</P><P>- When I create small TINS of just those areas the resulting TIN is fine (no gap)</P><P>- If I create the TIN with just the cross sections, and then use edit TIN to add the clip polygon, that usually solves all or most of the gaps - no idea why these would give different results</P><P></P><P>Thanks for any insight!</P><P>Neal</P></BODY></HTML> Mon, 26 Sep 2016 18:38:55 GMT NealBanerjee 2016-09-26T18:38:55Z Gap in TINs? https://community.esri.com/t5/geoprocessing-questions/gap-in-tins/m-p/329735#M11577 <HTML><HEAD></HEAD><BODY><P>I am creating a TIN of flood elevations from a polyline feature class that has elevations along a stream network (i.e. cross sections) and and stream corridor polygon feature class to clip the TIN (i.e. clip polygon).&nbsp; I am using cross sections as "hard lines" and clip polygon as "hard clip".&nbsp; I have done this for projects many times.&nbsp; Most of the time, the resulting TIN is what I am expecting, but occasionally it has these mysterious gaps that I cannot figure out why they happen.&nbsp; The attached graphic show an example.&nbsp; Does anyone know what may be causing this?&nbsp; Ive already check that the cross sections all have elevations are single part features, and that boundary is single part features.</P><P></P><P>A couple interesting observations:</P><P>- When I create small TINS of just those areas the resulting TIN is fine (no gap)</P><P>- If I create the TIN with just the cross sections, and then use edit TIN to add the clip polygon, that usually solves all or most of the gaps - no idea why these would give different results</P><P></P><P>Thanks for any insight!</P><P>Neal</P></BODY></HTML> Mon, 26 Sep 2016 18:38:55 GMT https://community.esri.com/t5/geoprocessing-questions/gap-in-tins/m-p/329735#M11577 NealBanerjee 2016-09-26T18:38:55Z