topic Combine layers with different projection using a transformation in ArcGIS API for Flex Questions https://community.esri.com/t5/arcgis-api-for-flex-questions/combine-layers-with-different-projection-using-a/m-p/388380#M9078 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>does the Flex API offer functionality to dynamically apply a geographic transformation in case a layer has a different projection than the Map object?</SPAN><BR /><BR /><SPAN>For example: in ArcGIS Desktop I would deal with this by defining the transformation as coordinate system option of the dataframe.</SPAN><BR /><BR /><SPAN>So far I have reprojected my data to match the basemap (web mercator), but this only works for my own data (not 3rd party services).</SPAN><BR /><BR /><SPAN>It would be possible to create a mapservice which applies this transformation to a 3rd party service,</SPAN><BR /><SPAN>however this is not desirable because of performance.</SPAN><BR /><BR /><SPAN>Regards,</SPAN></BODY></HTML> Tue, 09 Nov 2010 08:09:56 GMT Laurensvan_der_Burgt 2010-11-09T08:09:56Z Combine layers with different projection using a transformation https://community.esri.com/t5/arcgis-api-for-flex-questions/combine-layers-with-different-projection-using-a/m-p/388380#M9078 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>does the Flex API offer functionality to dynamically apply a geographic transformation in case a layer has a different projection than the Map object?</SPAN><BR /><BR /><SPAN>For example: in ArcGIS Desktop I would deal with this by defining the transformation as coordinate system option of the dataframe.</SPAN><BR /><BR /><SPAN>So far I have reprojected my data to match the basemap (web mercator), but this only works for my own data (not 3rd party services).</SPAN><BR /><BR /><SPAN>It would be possible to create a mapservice which applies this transformation to a 3rd party service,</SPAN><BR /><SPAN>however this is not desirable because of performance.</SPAN><BR /><BR /><SPAN>Regards,</SPAN></BODY></HTML> Tue, 09 Nov 2010 08:09:56 GMT https://community.esri.com/t5/arcgis-api-for-flex-questions/combine-layers-with-different-projection-using-a/m-p/388380#M9078 Laurensvan_der_Burgt 2010-11-09T08:09:56Z Re: Combine layers with different projection using a transformation https://community.esri.com/t5/arcgis-api-for-flex-questions/combine-layers-with-different-projection-using-a/m-p/388381#M9079 <HTML><HEAD></HEAD><BODY><SPAN>The Flex API does not support client side reprojection. If you're using a dynamic layer or feature layer, the API will request that the server do the reprojection when it creates the map image or returns the feature set.</SPAN></BODY></HTML> Tue, 09 Nov 2010 15:51:12 GMT https://community.esri.com/t5/arcgis-api-for-flex-questions/combine-layers-with-different-projection-using-a/m-p/388381#M9079 DasaPaddock 2010-11-09T15:51:12Z