topic Set an Output Spatial Reference for FeatureLayer? in ArcGIS API for Silverlight Questions

Set an Output Spatial Reference for FeatureLayer?

MichaelLacy — Wed, 23 Mar 2011 20:30:30 GMT

Is there a way to set the Output Spatial Reference for a FeatureLayer that references an ArcGIS map service? I know the map service supports this, but I don't see a way to do it with the FeatureLayer class. My base map is using web mercator (102100), but I would like to display layers from a service that is using WGS-84 (4326) by default. I also thought I might be able to handle the UpdateCompleted event and reproject the graphic geometries individually, but that event doesn't seem to fire in this case. It looks like if the default spatial reference of the map service is different than that of the map, then it never even attempts to load the layer.

Mike

Re: Set an Output Spatial Reference for FeatureLayer?

JenniferNery — Thu, 24 Mar 2011 00:04:57 GMT

This is a good documentation on Map.SpatialReference and layers: http://help.arcgis.com/en/webapi/silverlight/apiref/ESRI.ArcGIS.Client~ESRI.ArcGIS.Client.Map~SpatialReference.html

FeatureLayer is one of those that does not require manual re-projection.

OutSpatialReference is not exposed at the FeatureLayer level. It is available in the Query though, if you need it then use GraphicsLayer to hold the Query results instead http://help.arcgis.com/en/webapi/silverlight/apiref/ESRI.ArcGIS.Client~ESRI.ArcGIS.Client.Tasks.Query_members.html.

Re: Set an Output Spatial Reference for FeatureLayer?

MichaelLacy — Thu, 24 Mar 2011 14:30:38 GMT

I am getting old and stupid and should just become a manager. I had MaximumResolution set in the wrong units (4326 instead of 102100). The data does display now, without the need for manual reprojection. Thanks.

Re: Set an Output Spatial Reference for FeatureLayer?

AddisalemAbera1 — Fri, 21 Apr 2017 19:23:20 GMT

hello Michael,

how you was able to set Resolution??