GetFeatureInfo Operation |
GetFeatureInfo is an optional operation.
The GetFeatureInfo operation is designed to provide clients of a WMS with more information about features in the pictures of maps that were returned by previous Map requests. The canonical use case for GetFeatureInfo is that a user sees the response of a Map request and chooses a point on that map for which to obtain more information. The basic operation provides the ability for a client to specify which pixel is being asked about, which layer(s) should be investigated, and what format the information should be returned in.
It is only supported for those Layers for which the attribute queryable="1" (true) has been defined or inherited. A WMS should respond with a properly formatted Service Exception (application/vnd.ogc.se_xml) response if it encounters that request but does not support it.