topic Re: How to use the Con Tool in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-use-the-con-tool/m-p/602759#M8764 <HTML><HEAD></HEAD><BODY><BLOCKQUOTE class="jive-quote">Part of my problem is that I simply do not know where you write the expressions</BLOCKQUOTE><BR /><BR /><SPAN>If you have spatial analyst, you can enter the command in to Raster Calculator. This is possibly and icon in the SA toolbar (I have not used 9.3 in a while), but i is also a tool in the SA Toolbox (spatial analyst tools.tbx\map algebra\raster calculator).</SPAN><BR /><BR /><SPAN>Have you tried Arc Hydro tools to "cut" streams into your DEM?</SPAN></BODY></HTML> Mon, 18 Jun 2012 13:30:44 GMT MarkBoucher 2012-06-18T13:30:44Z How to use the Con Tool https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-use-the-con-tool/m-p/602758#M8763 <HTML><HEAD></HEAD><BODY><SPAN>I am trying to cut streams into my DEM. I have made my streams into rasters with a value of -1 (meters) with the rest of the raster having NoData value. I then want to make a conditional (or should I use Pick) to make a new Raster where the elevation is -1 where the streams are and otherwise have the value of the DEM. I have also tried to make a conditional expression in the Single Output Map Algebra without succes.</SPAN><BR /><SPAN>Part of my problem is that I simply do not know where you write the expressions (such as "Con(IsNull("Corrected_DEM"),???Original_DEM, "Corrected_DEM")". I use ArcGIS 9.3.1 but have mainly used the toolbox tool "Con".</SPAN><BR /><SPAN>Can someone explain to a newbie?</SPAN><BR /><SPAN>Regards Shaun</SPAN></BODY></HTML> Mon, 18 Jun 2012 12:12:44 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-use-the-con-tool/m-p/602758#M8763 ShaunDillon2 2012-06-18T12:12:44Z Re: How to use the Con Tool https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-use-the-con-tool/m-p/602759#M8764 <HTML><HEAD></HEAD><BODY><BLOCKQUOTE class="jive-quote">Part of my problem is that I simply do not know where you write the expressions</BLOCKQUOTE><BR /><BR /><SPAN>If you have spatial analyst, you can enter the command in to Raster Calculator. This is possibly and icon in the SA toolbar (I have not used 9.3 in a while), but i is also a tool in the SA Toolbox (spatial analyst tools.tbx\map algebra\raster calculator).</SPAN><BR /><BR /><SPAN>Have you tried Arc Hydro tools to "cut" streams into your DEM?</SPAN></BODY></HTML> Mon, 18 Jun 2012 13:30:44 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-use-the-con-tool/m-p/602759#M8764 MarkBoucher 2012-06-18T13:30:44Z Re: How to use the Con Tool https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-use-the-con-tool/m-p/602760#M8765 <HTML><HEAD></HEAD><BODY><SPAN>Ah. Ok now I have found it, and got it to work. Thank you for your help.</SPAN></BODY></HTML> Fri, 22 Jun 2012 08:24:12 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-use-the-con-tool/m-p/602760#M8765 ShaunDillon2 2012-06-22T08:24:12Z