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Adding support for a tileOrigin property to all gridded layers. If working with a cache of tiles that don't align with the bottom left corner of the layer's maxExtent property, set the layer's tileOrigin property. This change also removes the tileExtent property (not in any release), favoring tileOrigin as the way to determine how the grid is aligned. r=ahocevar (closes #3011).

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@11033 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
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Tim Schaub
2011-01-14 15:56:07 +00:00
parent 3515d23ce7
commit 441a5408cd
4 changed files with 63 additions and 23 deletions
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examples/tile-origin.html
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<!DOCTYPE html>
<html>
<head>
<title>OpenLayers Tile Origin Example</title>
<link rel="stylesheet" href="../theme/default/style.css" type="text/css">
<link rel="stylesheet" href="../theme/default/google.css" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body>
<h1 id="title">Tile Origin</h1>
<div id="tags">
grid, tileOrigin
</div>
<p id="shortdesc">
Demonstrates the use of the tileExtent property to differentiate
between the maximum extent and the tile extent for a layer.
</p>
<div id="map" class="smallmap"></div>
<div id="docs">
<p>
This example uses a layer that requests map tiles from a WMS
that only generates image responses for requests that align with
a particular tile lattice. In this case, the layer's
<code>maxExtent</code> does not align with that tile lattice.
To configure the layer with a tile extent that conforms to the
tile origin configured on the server, use the layer's
<code>tileOrigin</code> property.
</p><p>
View the <a href="tile-origin.js" target="_blank">tile-origin.js</a>
source to see how this is done
</p>
</div>
<script src="../lib/OpenLayers.js"></script>
<script src="tile-origin.js"></script>
</body>
</html>