topic Re: Raster overlays in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-overlays/m-p/108356#M1503 <HTML><HEAD></HEAD><BODY><BLOCKQUOTE class="jive-quote">I am trying to combine the rasters into a composite so I can have a total area of classified features and know what isn't classified. I want to have my overlay rasters overwrite the cells of the base raster. </BLOCKQUOTE><BR /><BR /><SPAN>Have you tried the Combine tool? The output raster includes every unique combination of values.</SPAN><BR /><BR /><SPAN>Pretty much any combination of cell "replacement" (of course you can't overwrite cells, you make a new raster) can be done using the Con and IsNull tools nested together in various combinations. Search this forum&nbsp; on&nbsp; </SPAN><SPAN style="font-style:italic;">raster calculator</SPAN><SPAN> or </SPAN><SPAN style="font-style:italic;">map algebra</SPAN><SPAN> and you'll see some good examples.</SPAN></BODY></HTML> Thu, 18 Jul 2013 01:41:53 GMT curtvprice 2013-07-18T01:41:53Z Raster overlays https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-overlays/m-p/108355#M1502 <HTML><HEAD></HEAD><BODY><SPAN>I have multiple rasters with classified features. I am trying to combine the rasters into a composite so I can have a total area of classified features and know what isn't classified. I want to have my overlay rasters overwrite the cells of the base raster. I have tried map algebra but can't seem to get it right. Does anyone have an idea how to do this? The dataset is too large to convert to polygons and do it the easy way.</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><SPAN>Andy</SPAN></BODY></HTML> Wed, 17 Jul 2013 22:53:24 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-overlays/m-p/108355#M1502 AndyMinor 2013-07-17T22:53:24Z Re: Raster overlays https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-overlays/m-p/108356#M1503 <HTML><HEAD></HEAD><BODY><BLOCKQUOTE class="jive-quote">I am trying to combine the rasters into a composite so I can have a total area of classified features and know what isn't classified. I want to have my overlay rasters overwrite the cells of the base raster. </BLOCKQUOTE><BR /><BR /><SPAN>Have you tried the Combine tool? The output raster includes every unique combination of values.</SPAN><BR /><BR /><SPAN>Pretty much any combination of cell "replacement" (of course you can't overwrite cells, you make a new raster) can be done using the Con and IsNull tools nested together in various combinations. Search this forum&nbsp; on&nbsp; </SPAN><SPAN style="font-style:italic;">raster calculator</SPAN><SPAN> or </SPAN><SPAN style="font-style:italic;">map algebra</SPAN><SPAN> and you'll see some good examples.</SPAN></BODY></HTML> Thu, 18 Jul 2013 01:41:53 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-overlays/m-p/108356#M1503 curtvprice 2013-07-18T01:41:53Z