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<!DOCTYPE html>
<html>
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<title>OpenLayers WFS Protocol with Filter</title>
<link rel="stylesheet" href="../theme/default/style.css" type="text/css">
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<body>
<h1 id="title">WFS Protocol and Filter</h1>
<div id="tags">
filter, wfs, spatial
</div>
<p id="shortdesc">
Demonstrates the use of a spatial filter in making GetFeature requests using the WFS protocol.
</p>
<div id="map" class="smallmap"></div>
<div id="docs">
<p>
If a vector layer has a filter and the protocol supports server-side filtering,
the filter will be serialized in requests for features. The WFS protocol can be
used with a vector layer to serialize a filter using OGC Filter Encoding.
</p><p>
This example has a draw control that is always active. When you draw a polygon
on the map, the filter for the main vector layer will be updated, and features
that intersect your drawn polygon will be requested.
</p><p>
See the <a href="wfs-spatial-filter.js" target="_blank">source</a>
for details on how this is done.
</p>
</div>
<script src="wfs-spatial-filter.js"></script>
</body>
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