Issue with IdentifyTask using REST API and ArcGIS Server 10.1

[SusanJones]

Howzit All,

We have identified a problem with the ArcGIS Server 10.1 REST API. With Silverlight, we developed a module that uses IdentifyTask to query against a DEM layer in a map service.  This module worked when the map service was run on ArcGIS Server 10.0, but when the map service was deployed onto ArcGIS 10.1, IdentifyTask fails to return any but null values.

The result from IdentifyTask returns Null, or Results.Count is 0 when queried against a DEM. IdentifyTask will work with a feature layer though.

We have tried running IdentifyTask() against several DEMs - a file geodatabase DEM, an ArcSDE DEM, and a Tif.  All data sources return null results, yet they work fine against the ArcGIS Server 10.0 REST API.

ReturnZ is set to True to allow for the change in usage at ArcGIS Server 10.1.

The development platform is Visual Studio 2010, C# Silverlight. We have map Services created in both flavours of ArcGIS Server.

Here�??s one of the DEM layers I had tested against, hosted over 10.1, to prove there may be a bug with IdentifyTask:
http://marketing.geocirrus.co.nz/arcgis/rest/services/WCC/clip_dem/MapServer/1

The local ESRI distributor have confirmed there is no issue when querying the DEM directly against the REST End point. But the problem is not about the REST end point but at the REST API implementation of IdentifyTask()

Susan

[TanuHoque]

Please contact Esri Tech Suport - we need to look into the issue with the data & map. In general it should work. Thanks.

[SusanJones]

Howzit All;

The Local ESRI Distributor in New Zealand has managed to recreate the issue of the Identify Task against REST with the Silverlight API at ArcGIS Server 10.1.

Exact same code works with ArcGIS Server 10.0 and the Silverlight API.

I guess my next question, does anyone have an alternate way of extracting the Values from a Terrain or Raster Layer?

Susan

North South GIS
Auckland, New Zealand

[TanuHoque]

Thanks Susan.
If it were TIN/Terrain layer, then it was never supported by a map service. It is planned to be supported in 10.1 SP1 though.

[SusanJones]

Yep, Trying a Terrain was a long shot as a potential workaround to a raster dataset (ArcSDE/FileGeodatabase,Tiff).
We would love to get tool to work with a Raster Layer in a map service.

A not-very-workable workaround is not to upgrade. But it is too late to revert.

[TanuHoque]

Susan,
Identifying a raster layer should work.

[SusanJones]

Howzit Tanu -

The Bug has been submitted against NIM085410.

Susan