topic Spatial Analyst projection output in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/spatial-analyst-projection-output/m-p/187700#M2650 <HTML><HEAD></HEAD><BODY><SPAN>I'm generating a total cost surface for a least cost model.&nbsp; When I input my eight layers into raster calculator I receive the warning </SPAN><BR /><BR /><SPAN>"Your raster data will be projected to another coordiante system to perform the requested analysis.&nbsp; This can be slow and induce error in your result, particularly for large geographic areas and at high latitudes.&nbsp; Would you like to continue?"</SPAN><BR /><BR /><SPAN>Why am I receiving this warning, all of my layers are projected to the same coordinate system so there seems to be no conflict.&nbsp; When I do a smaller equation with only two of any of my eight themes this warning does not come up.&nbsp; Should I be concerned about this warning?&nbsp; Raster Calculator outputs my total cost surface and it appears to be in the correct coordinate system.</SPAN><BR /><BR /><SPAN>TIA!</SPAN></BODY></HTML> Mon, 17 May 2010 16:40:40 GMT MartinSiwek 2010-05-17T16:40:40Z Spatial Analyst projection output https://community.esri.com/t5/arcgis-spatial-analyst-questions/spatial-analyst-projection-output/m-p/187700#M2650 <HTML><HEAD></HEAD><BODY><SPAN>I'm generating a total cost surface for a least cost model.&nbsp; When I input my eight layers into raster calculator I receive the warning </SPAN><BR /><BR /><SPAN>"Your raster data will be projected to another coordiante system to perform the requested analysis.&nbsp; This can be slow and induce error in your result, particularly for large geographic areas and at high latitudes.&nbsp; Would you like to continue?"</SPAN><BR /><BR /><SPAN>Why am I receiving this warning, all of my layers are projected to the same coordinate system so there seems to be no conflict.&nbsp; When I do a smaller equation with only two of any of my eight themes this warning does not come up.&nbsp; Should I be concerned about this warning?&nbsp; Raster Calculator outputs my total cost surface and it appears to be in the correct coordinate system.</SPAN><BR /><BR /><SPAN>TIA!</SPAN></BODY></HTML> Mon, 17 May 2010 16:40:40 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/spatial-analyst-projection-output/m-p/187700#M2650 MartinSiwek 2010-05-17T16:40:40Z