[OpenLayers-Dev] Issue with TMS - works for 2.7, but not 2.10

Tue Mar 1 23:23:09 EST 2011

I've been generating tiles with MapTiler that creates a stub for 
openlayers to look at the file. Change this
to my local Openlayers-2.10 and it stops working.

The issue occurs with initGriddedTiles and the call to addTile. This is 
supposed to be implemented by subclass but not.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml>"
<head>
<title>Reservoir Potential-32.png</title>
<meta http-equiv='imagetoolbar' content='no'/>
<style type="text/css"> v\:* {behavior:url(#default#VML);}
                 html, body { overflow: hidden; padding: 0; height: 
100%; width: 100%; font-family: 'Lucida 
Grande',Geneva,Arial,Verdana,sans-serif; }
                 body { margin: 10px; background: #fff; }
                 h1 { margin: 0; padding: 6px; border:0; font-size: 20pt; }
                 #header { height: 43px; padding: 0; background-color: 
#eee; border: 1px solid #888; }
                 #subheader { height: 12px; text-align: right; 
font-size: 10px; color: #555;}
                 #map { height: 95%; border: 1px solid #888; }
</style>
<script 
src='http://maps.google.com/maps?file=api&amp;v=2&amp;key=INSERT_YOUR_KEY_HERE' 
type='text/javascript'></script>
<script src="http://www.openlayers.org/api/2.7/OpenLayers.js" 
type="text/javascript"></script>
<script type="text/javascript">
                 var map;
                 var mapBounds = new OpenLayers.Bounds( 171.557011392, 
-41.01960226, 175.486543045, -37.9967509295);
                 var mapMinZoom = 6;
                 var mapMaxZoom = 10;

                 // avoid pink tiles
                 OpenLayers.IMAGE_RELOAD_ATTEMPTS = 3;
                 OpenLayers.Util.onImageLoadErrorColor = "transparent";

                 function init(){
                 var options = {
                     controls: [],
                     projection: new OpenLayers.Projection("EPSG:900913"),
                     displayProjection: new 
OpenLayers.Projection("EPSG:4326"),
                     units: "m",
                     maxResolution: 156543.0339,
                     maxExtent: new OpenLayers.Bounds(-20037508, 
-20037508, 20037508, 20037508.34)
                     };
                 map = new OpenLayers.Map('map', options);

                 // create Google Mercator layers
                 var gmap = new OpenLayers.Layer.Google("Google Streets",
                     { sphericalMercator: true, numZoomLevels: 20} );
                 var gsat = new OpenLayers.Layer.Google("Google Satellite",
                     {type: G_SATELLITE_MAP, sphericalMercator: true, 
numZoomLevels: 20} );
                 var ghyb = new OpenLayers.Layer.Google("Google Hybrid",
                     {type: G_HYBRID_MAP, sphericalMercator: true, 
numZoomLevels: 20});
                 var gter = new OpenLayers.Layer.Google("Google Terrain",
                     {type: G_PHYSICAL_MAP, sphericalMercator: true, 
numZoomLevels: 20 });

                 // create OSM/OAM layer

                 // create TMS Overlay layer
                 var tmsoverlay = new OpenLayers.Layer.TMS( "TMS 
Overlay", "data/TaranakiAtlas/Reservoir Potential-32/",
                     {    //url: '', serviceVersion: '.', layername: '.',
                         type: 'png', getURL: overlay_getTileURL, alpha: 
true,
                         isBaseLayer: false
                     });
                 if (OpenLayers.Util.alphaHack() == false) { 
tmsoverlay.setOpacity(0.7); }

                 map.addLayers([gmap, gsat, ghyb, gter,
                                tmsoverlay]);

                 var switcherControl = new 
OpenLayers.Control.LayerSwitcher();
                 map.addControl(switcherControl);
                 switcherControl.maximizeControl();

                 map.zoomToExtent( 
mapBounds.transform(map.displayProjection, map.projection ) );

                 map.addControl(new OpenLayers.Control.PanZoomBar());
                 map.addControl(new OpenLayers.Control.MousePosition());
                 map.addControl(new OpenLayers.Control.MouseDefaults());
                 map.addControl(new OpenLayers.Control.KeyboardDefaults());
             }

             function overlay_getTileURL(bounds) {
                 var res = this.map.getResolution();
                 var x = Math.round((bounds.left - this.maxExtent.left) 
/ (res * this.tileSize.w));
                 var y = Math.round((bounds.bottom - 
this.tileOrigin.lat) / (res * this.tileSize.h));
                 var z = this.map.getZoom();
                 if (this.map.baseLayer.name == 'Virtual Earth Roads' || 
this.map.baseLayer.name == 'Virtual Earth Aerial' || 
this.map.baseLayer.name == 'Virtual Earth Hybrid') {
                    z = z + 1;
                 }
                 if (mapBounds.intersectsBounds( bounds ) && z >= 
mapMinZoom && z <= mapMaxZoom ) {
                    //console.log( this.url + z + "/" + x + "/" + y + 
"." + this.type);
                    return this.url + z + "/" + x + "/" + y + "." + 
this.type;
                 } else {
                    return "images/none.png";
                 }
             }

</script>
</head>
<body onload="init()">
<div id="header"><h1>Reservoir Potential-32.png</h1></div>
<div id="subheader">Generated by <a 
href="http://www.maptiler.org/">MapTiler</a>/<a 
href="http://www.klokan.cz/projects/gdal2tiles/">GDAL2Tiles</a>, 
Copyright &copy; 2008 <a href="http://www.klokan.cz/">Klokan Petr 
Pridal</a>, <a href="http://www.gdal.org/">GDAL</a> &amp; <a 
href="http://www.osgeo.org/">OSGeo</a> <a 
href="http://code.google.com/soc/">GSoC</a>

</div>
<div id="map"></div>
<script type="text/javascript" >resize()</script>
</body>
</html>

-- 
Phil Scadden, Senior Scientist GNS Science Ltd 764 Cumberland St, 
Private Bag 1930, Dunedin, New Zealand Ph +64 3 4799663, fax +64 3 477 5232

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