topic Re: Querying a Image Layer from Flex in ArcGIS API for Flex Questions

Querying a Image Layer from Flex

LuisSantos — Tue, 03 Apr 2012 00:39:52 GMT

Hello guys,

I just want to know if it is possible to query an Image layer from the client using QueryTask or IdentifiedTask. At server side I have a image layer and I need to know the specific value in a specific geometry (point) and a specific time extent in this layer. The problem is that the image layer does not expose any service. I wonder if there is a workaround for this.

Luis Santos
Software developer at National Geographic

Re: Querying a Image Layer from Flex

IvanBespalov — Tue, 03 Apr 2012 03:29:21 GMT

Luis,
I think, yes - it is possible.

ImageService

The image service resource supports the following operations:
     Export Image: Returns a seamless mosaicked image for the specified area.
     Identify (added at 10): Identifies the content of an image service.
     Query (added at 10): Query the image service.
     Download (added at 10): Downloads raw raster files.

ImageServiceIdentifyTask

Since : ArcGIS API for Flex 2.0
Performs an identify operation on an image service resource. It identifies the content of an image service for a given location and a given mosaic rule. The location can be a point or a polygon. The identify operation is supported by all kinds of image services (Mosaic Datasets, Raster Datasets or an Image Service definition).

QueryTask

... For image services, the map service itself is the 'single' layer...

Did you tried to make query/identify?
Do you have access to ESRI help page?
Do you have access to ArcGIS API for FLEX reference?

Re: Querying a Image Layer from Flex

DasaPaddock — Tue, 03 Apr 2012 16:36:18 GMT

Here's a sample:
http://help.arcgis.com/en/webapi/flex/samples/index.html#/Query_the_raster_catalog/01nq0000003p000000/