Pitney Bowes MapXtreme User Manual

Page 390

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Chapter 22: Web Feature Service

Understanding WFS Server Operations

MapXtreme v7.1

397

Developer Guide

</Operations>
- <FeatureType>

<Name>miwfs:USA</Name>

<Title>Title for usa</Title>
<Abstract>Abstract for USA</Abstract>
<Keywords>Keywords for USA</Keywords>
<SRS>epsg:4326</SRS>
<LatLongBoundingBox minx="-179.62816" miny="18.925255" maxx="-
66.951403" maxy="71.42856" />
</FeatureType>
</FeatureTypeList>
- <ogc:Filter_Capabilities>
- <ogc:Spatial_Capabilities>
- <ogc:Spatial_Operators>
<ogc:BBOX />
<ogc:Equals />
<ogc:Disjoint />
<ogc:Intersect />
<ogc:Within />
<ogc:Contains />
</ogc:Spatial_Operators>
</ogc:Spatial_Capabilities>
- <ogc:Scalar_Capabilities>
<ogc:Logical_Operators />
- <ogc:Comparison_Operators>
<ogc:Simple_Comparisons />
<ogc:NullCheck />
</ogc:Comparison_Operators>
- <ogc:Arithmetic_Operators>
<ogc:Simple_Arithmetic />
</ogc:Arithmetic_Operators>
</ogc:Scalar_Capabilities>
</ogc:Filter_Capabilities>
</WFS_Capabilities>

DescribeFeatureType

After finding the available feature type with GetCapabilities request, the DescribeFeatureType
request asks for detailed information about one or more of the available feature types. In MapXtreme
a WFS feature type is represented by a table, and a WFS feature is equivalent to a row of
information from a table. The response to a DescribeFeatureType request includes the name of the
feature type (the name of the table) and the names and types of the properties (names and types of
the columns) in the table. The results are returned in an XML schema document in GML format.

DescribeFeatureType is supported via HTTP GET and HTTP POST. The Schema returned will have
the form whereby each property in the feature type becomes an element.

MapXtreme does not return the following column types as properties:

MIDbType.Binary

MIDbType.CoordSys

MIDbType.Grid

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