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<title>Using Proj4JS for vector reprojection</title>
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<h1 id="title">Using Proj4JS for vector reprojection</h1>
<div id="tags">
projection, proj, proj4js, reprojection, reproject,
transform, transformation, epsg, srs
</div>
<p id="shortdesc">
This example shows how to reproject vector features within
OpenLayers. The baselayer shows Germany in the projection
EPSG:31467 (GK 3). When one clicks on the buttons, features with
geometries originally in EPSG:4326 will be transformed to the
projection of the map on-the-fly.
</p>
<p>
The features are internally reprojected with the JavaScript library
<a href="http://proj4js.org/">Proj4JS</a>. Please note that usually
you would not inlude Proj4JS the way it is done in this example.
In a production environment you would furthermore have a local copy
of the Proj4JS-projection definition that is hotlinked in this
example (see Graticule example for how to do this).
</p>
<div id="map">
</div>
<ul>
<li>
<input type="button" value="Add Cologne (~ 6.97, 50.95)"
onclick="addVector(6.966667, 50.95, this);"
id="btnCologne">
</li>
<li>
<input type="button" value="Add Berlin (~ 13.40, 52.50)"
onclick="addVector(13.398889, 52.500556, this);"
id="btnBerlin">
</li>
<li>
<input type="button" value="Add Hamburg (~ 10.00, 53.57)"
onclick="addVector(10.001389, 53.565278, this);"
id="btnHamburg">
</li>
<li>
<input type="button" value="Add Munich (~ 11.57, 48.13)"
onclick="addVector(11.566667, 48.133333, this);"
id="btnMunich">
</li>
<li>
<input type="button" value="Add country outline (polygon)"
onclick="addOutline(this);" id="btnGermany">
</li>
<li>
<input type="button" value="...clear vector features"
onclick="clearVectors();">
</li>
<li>
<div id="status">
</div>
</li>
</ul>
<div id="attribution"></div>
<div id="mouse-position-4326"></div>
<div id="mouse-position-31467"></div>
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