Does ArcGIS Server support querying multiple layers of service in single request?

Question

I am using ArcGIS REST services from a server-side app and parsing the JSON response. I need information from several different layers on the same service, and my queries are always for points.

Is there a way to make a single request that amalgamates results from multiple layers?

At present I can meet my requirements by making multiple requests, for example to endpoints at

• /arcgis/rest/services/foo/bar/MapServer/0/query?geometry=152.9259%2C-27.5516&geometryType=esriGeometryPoint&inSR=&spatialRel=esriSpatialRelIntersects...
• /arcgis/rest/services/foo/bar/MapServer/2/query?...as above...
• /arcgis/rest/services/foo/bar/MapServer/6/query?...as above...

My question is, am I missing some aggregated service that enables me to make a single request to multiple layers of the same service for the same spatial query?

Answer 1

Simply - No.

You can "query", and by query, I mean do a Map Export on a mapservice to get an IMAGE of all the layers. Eg. http://sampleserver6.arcgisonline.com/arcgis/rest/services/Water_Network/MapServer/export?

But to do an attribute query you must do it on each layer individually. The RESTful contract when making a query needs to be pretty well defined. I surmise that a query on the entire service would need to allow for a lot of 'what-if'. It's unlikely each layer would have the same attributes, so how could the client application expect certain attributes in a response? By doing per layer, where there is a complete layer definition, the app can get this list of attributes before making the request and know what will come back.