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#529 give tiles gutters - all layers that use Tile.Image must now look after layer.imageSize and layer.imageOffset - this is handled by layer.setTileSize - for untiled layers, setTileSize must be defined by the subclass - gutters are currently supported in Layer.Mapserver and Layer.WMS

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@2979 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
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Tim Schaub
2007-04-02 17:18:38 +00:00
parent 7f0ccb69f0
commit b6a5e6619a
14 changed files with 351 additions and 56 deletions
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examples/gutter.html Normal file
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<html>
<head>
<style type="text/css">
#map {
width: 500px;
height: 300px;
border: 1px solid gray;
}
p.caption {
width: 500px;
}
</style>
<script src="../lib/OpenLayers.js"></script>
<script type="text/javascript">
<!--
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 2;
var map;
window.onload = function() {
options = {maxExtent: new OpenLayers.Bounds(-73.5295, 41.2318,
-69.9097, 42.8883),
maxResolution: 0.0003}
map = new OpenLayers.Map('map', options);
var roads15 = new OpenLayers.Layer.WMS( "Roads (15px gutter)",
"http://boston.freemap.in/cgi-bin/mapserv?map=/www/freemap.in/boston/map/gmaps.map&",
{layers: 'roads_200_40'},
{gutter: 15});
var roads = new OpenLayers.Layer.WMS( "Roads (no gutter)",
"http://boston.freemap.in/cgi-bin/mapserv?map=/www/freemap.in/boston/map/gmaps.map&",
{layers: 'roads_200_40'});
map.addLayers([roads, roads15]);
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.setCenter(new OpenLayers.LonLat(-71.848, 42.2), 0);
}
// -->
</script>
</head>
<body>
<h1>OpenLayers Gutter Example</h1>
<div id="map"></div>
<p class="caption">
When you render tiles with certain types of symbols, there are artifacts
at tile edges that make symbology not look continuous. In the center of
the above map (when it first loads), the large orange road is split
vertically by a tile. Open the layer switcher and change to the layer
with a 15 pixel gutter to see how the symbology looks nicer.
</p>
</body>
</html>