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MapInfo Spatial Server Web Map Service - Product Documentation ...

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Getting Information About <strong>Map</strong> Features<br />

Once a Get<strong>Map</strong> request has been successfully completed the user may want further information about<br />

the features included in the map. Use the GetFeatureInfo request to get this further information from a<br />

server. A GetFeatureInfo request returns information regarding the layers in the map and the queryable<br />

attributes of each layer. This operation is optional. If GetFeatureInfo is employed, it must be issued after<br />

a Get<strong>Map</strong> request is sent, as the X/Y pixel coordinate of a point on that map is a required input of a<br />

GetFeatureInfo request. Refer to the <strong>Web</strong> <strong>Map</strong>ping <strong>Service</strong> OGC Specification for more information<br />

about this capability (http://www.opengeospatial.org/standards/).<br />

Inputs and Behaviors<br />

The following table lists the possible GetFeatureInfo request inputs.<br />

Input<br />

VERSION=version<br />

REQUEST=GetFeatureInfo<br />

<br />

QUERY_LAYERS=layer_list<br />

Required<br />

Yes<br />

Yes<br />

Yes<br />

Yes<br />

<strong><strong>Map</strong>Info</strong> <strong>Spatial</strong> <strong>Server</strong> <strong>Web</strong> <strong>Map</strong> <strong>Service</strong><br />

Description<br />

Chapter 3: <strong>Web</strong> <strong>Map</strong> <strong>Service</strong> Capabilities<br />

Request version. <strong><strong>Map</strong>Info</strong> <strong>Spatial</strong> <strong>Server</strong> WMS supports both<br />

version 1.1.1 and 1.3.0 of the OGC specification.<br />

Request name. For a GetFeatureInfo request this is always<br />

GetFeatureInfo.<br />

Partial copy of the Get<strong>Map</strong> request parameters that generated<br />

the map for which information is desired. The spatial reference<br />

system, bounding box, width, height, and layers of the Get<strong>Map</strong><br />

request are required parameters. See the sample request<br />

below.<br />

Comma-separated list of one or more layers to be queried.<br />

You do not need to include every layer included in the initial<br />

Get<strong>Map</strong> request.<br />

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