topic Raster Calculator: Con tool expression error in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-calculator-con-tool-expression-error/m-p/594306#M8652 <HTML><HEAD></HEAD><BODY><SPAN>Hi, </SPAN><BR /><BR /><SPAN>I am a ArcGIS 10 user and I am trying to calculate between a series of points the equidistant lines on a cost surface. </SPAN><BR /><SPAN>For Point1 and Point2 I have calculated the cost surfaces 1_Cost and 2_Cost. Now I want to create a new raster that gives the value "1" to raster cells that are "closer" to Point1 and "2" to those closer to Point2. </SPAN><BR /><SPAN>I tried to do this with the Raster Calculater (Spatial Analyst) tool, but I keep getting syntax errors. If I understand correctly the syntax that I should use in the Raster Calculator looks like this: </SPAN><BR /><BR /><SPAN>Con (in_conditional_raster, in_true_raster_or_constant, {in_false_raster_or_constant}, {where_clause}) </SPAN><BR /><BR /><SPAN>But I get an expression error when I enter:</SPAN><BR /><SPAN>Con ("Cost1", "1", {"2"}, {"Cost1" &lt; "Cost2"})</SPAN><BR /><BR /><SPAN>What would the correct syntax look like? </SPAN><BR /><SPAN>Thanks in advance for your efforts!</SPAN></BODY></HTML> Thu, 06 Oct 2011 21:49:43 GMT Vincentvan_Exel 2011-10-06T21:49:43Z Raster Calculator: Con tool expression error https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-calculator-con-tool-expression-error/m-p/594306#M8652 <HTML><HEAD></HEAD><BODY><SPAN>Hi, </SPAN><BR /><BR /><SPAN>I am a ArcGIS 10 user and I am trying to calculate between a series of points the equidistant lines on a cost surface. </SPAN><BR /><SPAN>For Point1 and Point2 I have calculated the cost surfaces 1_Cost and 2_Cost. Now I want to create a new raster that gives the value "1" to raster cells that are "closer" to Point1 and "2" to those closer to Point2. </SPAN><BR /><SPAN>I tried to do this with the Raster Calculater (Spatial Analyst) tool, but I keep getting syntax errors. If I understand correctly the syntax that I should use in the Raster Calculator looks like this: </SPAN><BR /><BR /><SPAN>Con (in_conditional_raster, in_true_raster_or_constant, {in_false_raster_or_constant}, {where_clause}) </SPAN><BR /><BR /><SPAN>But I get an expression error when I enter:</SPAN><BR /><SPAN>Con ("Cost1", "1", {"2"}, {"Cost1" &lt; "Cost2"})</SPAN><BR /><BR /><SPAN>What would the correct syntax look like? </SPAN><BR /><SPAN>Thanks in advance for your efforts!</SPAN></BODY></HTML> Thu, 06 Oct 2011 21:49:43 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-calculator-con-tool-expression-error/m-p/594306#M8652 Vincentvan_Exel 2011-10-06T21:49:43Z Re: Raster Calculator: Con tool expression error https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-calculator-con-tool-expression-error/m-p/594307#M8653 <HTML><HEAD></HEAD><BODY><SPAN>The curly braces indicate optional parameters and are not part of the syntax, this is documented in the help - </SPAN><A href="http://help.arcgis.com/en/arcgisdesktop/10.0/help/002t/002t00000011000000.htm">http://help.arcgis.com/en/arcgisdesktop/10.0/help/002t/002t00000011000000.htm</A><BR /><BR /><SPAN>The correct syntax would be something like: Con ( "Cost1" &lt; "Cost2", "1", "2")</SPAN></BODY></HTML> Tue, 11 Oct 2011 02:24:11 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-calculator-con-tool-expression-error/m-p/594307#M8653 Luke_Pinner 2011-10-11T02:24:11Z