topic Re: Floodplain Delineation Using Grids in Water Resources Questions https://community.esri.com/t5/water-resources-questions/floodplain-delineation-using-grids/m-p/297804#M1404 <HTML><HEAD></HEAD><BODY><SPAN>Georas does weird things when you try working with grids. The georas mapper is such a black box we dont even try to use it anymore.&nbsp; Based on the line in the error saying its possibly an empty feature class as an output I would first verify that all of your files are in the same spatial reference.&nbsp; </SPAN><BR /><BR /><SPAN>Do you have a 3dAnalyst license?&nbsp; If so, I would convert your terrain and water surface grids to TINs.&nbsp; Then you can use 3dAnalyst-&gt; Triangulated Surface-&gt;Surface Difference.</SPAN><BR /><BR /><SPAN>This outputs a polygon shapefile of your floodplain and has the option to output a depth grid as well.&nbsp; Hope that helps.</SPAN></BODY></HTML> Thu, 21 Nov 2013 21:14:57 GMT MattMead 2013-11-21T21:14:57Z Floodplain Delineation Using Grids https://community.esri.com/t5/water-resources-questions/floodplain-delineation-using-grids/m-p/297803#M1403 <HTML><HEAD></HEAD><BODY><SPAN>Hi folks,</SPAN><BR /><SPAN>I'm hoping someone can help me resolve this issue. </SPAN><BR /><SPAN>I'm trying to run the for-mentioned tool in ArcGIS but I keep getting this error.</SPAN><BR /><SPAN>[ATTACH=CONFIG]29257[/ATTACH]</SPAN><BR /><SPAN>I have no idea where to start troubleshooting so I was wondering if any of you have ever experienced this before.</SPAN><BR /><SPAN>Any suggestions welcome.</SPAN><BR /><SPAN>Thanks</SPAN><BR /><BR /><SPAN>Shiko</SPAN></BODY></HTML> Thu, 21 Nov 2013 02:10:56 GMT https://community.esri.com/t5/water-resources-questions/floodplain-delineation-using-grids/m-p/297803#M1403 ShikoNjuno 2013-11-21T02:10:56Z Re: Floodplain Delineation Using Grids https://community.esri.com/t5/water-resources-questions/floodplain-delineation-using-grids/m-p/297804#M1404 <HTML><HEAD></HEAD><BODY><SPAN>Georas does weird things when you try working with grids. The georas mapper is such a black box we dont even try to use it anymore.&nbsp; Based on the line in the error saying its possibly an empty feature class as an output I would first verify that all of your files are in the same spatial reference.&nbsp; </SPAN><BR /><BR /><SPAN>Do you have a 3dAnalyst license?&nbsp; If so, I would convert your terrain and water surface grids to TINs.&nbsp; Then you can use 3dAnalyst-&gt; Triangulated Surface-&gt;Surface Difference.</SPAN><BR /><BR /><SPAN>This outputs a polygon shapefile of your floodplain and has the option to output a depth grid as well.&nbsp; Hope that helps.</SPAN></BODY></HTML> Thu, 21 Nov 2013 21:14:57 GMT https://community.esri.com/t5/water-resources-questions/floodplain-delineation-using-grids/m-p/297804#M1404 MattMead 2013-11-21T21:14:57Z