MapInfo Spatial Server Web Map Service - Product Documentation ...
MapInfo Spatial Server Web Map Service - Product Documentation ...
MapInfo Spatial Server Web Map Service - Product Documentation ...
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Note:<br />
A basic <strong>Web</strong> <strong>Map</strong> <strong>Service</strong> classifies its georeferenced information holdings into "layers" and offers<br />
a number of predefined "styles" in which to display those layers.<br />
How to Get Information About a WMS <strong>Server</strong><br />
When first finding a <strong>Web</strong> <strong>Map</strong> <strong>Server</strong>, it is necessary to find out the names of available layers, styles in<br />
use, spatial information in use, and other information that the server provides, in order to make a request<br />
for an image that is within the parameters of the server.<br />
The GetCapabilities request retrieves service-level metadata over the Internet or intranet, including the<br />
server name, the layer names, abstracts about the data, and valid request parameters, among other<br />
data. The following section highlights potential ways to apply this capability: Getting <strong>Service</strong>-level<br />
Metadata About a WMS on page 20.<br />
How to Retrieve a <strong>Map</strong> From a WMS <strong>Server</strong><br />
Get<strong>Map</strong> retrieves the geospatial information, over the Internet or an intranet, based on a specific request<br />
of the data you want and returns it as a raster image. When invoking Get<strong>Map</strong> a WMS client can specify:<br />
• Layers<br />
• Styles<br />
• A bounding box (the area to be mapped)<br />
• A coordinate reference system (also known as the spatial reference system)<br />
• Output image format (JPEG, GIF, PNG. and others).<br />
• Output size (height and width of the returned image)<br />
• Background transparency and color<br />
The following section highlights potential ways to apply this capability: Getting <strong>Map</strong>s on page 23.<br />
How to Use the WMS <strong>Server</strong> GetFeatureInfo Operations<br />
GetFeatureInfo returns request information for a feature at a given point on the map after a Get<strong>Map</strong> has<br />
been called. This is a search-at-point operation in which, after a Get<strong>Map</strong> request, the GetFeatureInfo<br />
request supplies the X, Y pixel coordinates of the location about which you want more information. The<br />
following section highlights potential ways to apply this capability: Getting Information About <strong>Map</strong><br />
Features on page 25.<br />
<strong><strong>Map</strong>Info</strong> <strong>Spatial</strong> <strong>Server</strong> <strong>Web</strong> <strong>Map</strong> <strong>Service</strong><br />
Chapter 1: Introduction<br />
7