I switched from Openlayers to Google Maps APIs about a year ago, but here is my
old code if you’d like to look at it (attached testgeoff.zip). I just tried it
on my server, and it still works – tiles aren’t blank for me.
The key code is below, where I set up a “TMS” tile request callback.
As a sanity check, if you zoom into zoom level 15 at “Four Corners” (37.0000 N,
109.0000 W), your code should be requesting this tile:
http://maps.mytopo.com/YOURAPIKEY/tilecache.py/1.0.0/topoG/15/6458/12754.png
For instance, this works for me in my web browser:
http://maps.mytopo.com/digital-topo/tilecache.py/1.0.0/topoG/15/6458/12754.png
Make sure you have requested your own API key from <mailto:[email protected]>
[email protected]
I do seem to get blank tiles (failed requests) sometimes when I use other
sites’ API keys.
-- Geoff
///////////////////////////////////////////////////////////////////////////////////////////
// Tile URL generator for mytopo
function TMS_GetTileURL(bounds) {
var res = this.map.getResolution();
var x = Math.round((bounds.left - this.maxExtent.left) / (res *
this.tileSize.w));
var y = Math.round((this.maxExtent.top - bounds.top) / (res *
this.tileSize.h));
var z = this.map.getZoom();
return this.url + z + "/" + x + "/" + y + "." + this.type;
}
[…]
// var mySite = 'boontracker';
// var mySite = 'digital-topo';
var mySite = 'mytopo'; // replace with your site name, registered
with mytopo
layerMytopo = new OpenLayers.Layer.TMS(
"Topo",
"http://maps.mytopo.com/"+mySite+"/tilecache.py/1.0.0/topoG/";,
{
type: 'png',
getURL: TMS_GetTileURL,
displayOutsideMaxExtent: false,
attribution: '<a
href="http://www.mytopo.com/index.cfm";>© MyTopo.com</a>',
numZoomLevels: 17
}
);
--
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http://osgeo-org.1803224.n2.nabble.com/mytopo-layer-for-USGS-topo-insead-of-terraservice-tp5700129p6518352.html
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