topic Perform Calculations on Feature Layer Data? in ArcGIS JavaScript Maps SDK Questions https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/perform-calculations-on-feature-layer-data/m-p/659402#M61562 <HTML><HEAD></HEAD><BODY><SPAN>Hi All,</SPAN><BR /><BR /><SPAN>I am trying (unsuccessfully) to perform calculations on the attribute data of a feature layer, and then display the results as graphics. I am using the JavaScript API accessing the ESRI Sample Server 1 (9.3.1), as this is a proof of concept.</SPAN><BR /><BR /><SPAN>My example is using the Demographic Feature Layer: coarse counties (ID3) with the Definition Expression set to Pennsylvania and the outfield set to Population (POP2000).&nbsp; Population would then be multiplied by 1,000 (eventually a user defined value) and update the class break render, so the map/counties would change based on the change (calculation) in population.</SPAN><BR /><BR /><SPAN>1) Is this possible? </SPAN><BR /><SPAN>2) Is this the right approach or would a different approach be better/work?</SPAN><BR /><SPAN>3) I had read a post that touched on needing ArcServer 10 to do this, is that true?</SPAN><BR /><BR /><SPAN>Any advice/help is greatly appreciated!</SPAN></BODY></HTML> Fri, 07 Jan 2011 15:59:39 GMT JeremyAlbright 2011-01-07T15:59:39Z Perform Calculations on Feature Layer Data? https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/perform-calculations-on-feature-layer-data/m-p/659402#M61562 <HTML><HEAD></HEAD><BODY><SPAN>Hi All,</SPAN><BR /><BR /><SPAN>I am trying (unsuccessfully) to perform calculations on the attribute data of a feature layer, and then display the results as graphics. I am using the JavaScript API accessing the ESRI Sample Server 1 (9.3.1), as this is a proof of concept.</SPAN><BR /><BR /><SPAN>My example is using the Demographic Feature Layer: coarse counties (ID3) with the Definition Expression set to Pennsylvania and the outfield set to Population (POP2000).&nbsp; Population would then be multiplied by 1,000 (eventually a user defined value) and update the class break render, so the map/counties would change based on the change (calculation) in population.</SPAN><BR /><BR /><SPAN>1) Is this possible? </SPAN><BR /><SPAN>2) Is this the right approach or would a different approach be better/work?</SPAN><BR /><SPAN>3) I had read a post that touched on needing ArcServer 10 to do this, is that true?</SPAN><BR /><BR /><SPAN>Any advice/help is greatly appreciated!</SPAN></BODY></HTML> Fri, 07 Jan 2011 15:59:39 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/perform-calculations-on-feature-layer-data/m-p/659402#M61562 JeremyAlbright 2011-01-07T15:59:39Z