topic Raster value sum to 1 in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-value-sum-to-1/m-p/744102#M10784 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><SPAN>Can anyone help me.&nbsp; I'm using arc 10 and I am looking to compare multiple raster data sets but I need each raster data set to sum to one.&nbsp; I have been told to multiply the row, column and mean values of the raster set together.&nbsp; I was then told to divide the original raster by the number generated from this calculation, but so far the new maps that are generated do not have a value of one.&nbsp; Can anyone advise me.</SPAN><BR /><SPAN>Many thanks</SPAN></BODY></HTML> Tue, 21 Feb 2012 15:38:01 GMT CatrionaBrogan 2012-02-21T15:38:01Z Raster value sum to 1 https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-value-sum-to-1/m-p/744102#M10784 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><SPAN>Can anyone help me.&nbsp; I'm using arc 10 and I am looking to compare multiple raster data sets but I need each raster data set to sum to one.&nbsp; I have been told to multiply the row, column and mean values of the raster set together.&nbsp; I was then told to divide the original raster by the number generated from this calculation, but so far the new maps that are generated do not have a value of one.&nbsp; Can anyone advise me.</SPAN><BR /><SPAN>Many thanks</SPAN></BODY></HTML> Tue, 21 Feb 2012 15:38:01 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/raster-value-sum-to-1/m-p/744102#M10784 CatrionaBrogan 2012-02-21T15:38:01Z