[Tilecache] too far from tile corner

Wed Aug 26 08:21:05 EDT 2009

Dear list, 

I have a problem with tilecache. My tiles are not rendered because they are
not aligned with the grid. 

Here is my sample map: 

<html xmlns="http://www.w3.org/1999/xhtml" <http://www.w3.org/1999/xhtml> > 
 <head> 
   <title>TileCache</title> 
   <script src="js/OpenLayers.js"></script> 
   <!--script type="text/javascript"
src="lib/proj4js-compressed.js"></script--> 
   <script type="text/javascript" 
           src="http://maps.google.com/maps?file=api
<http://maps.google.com/maps?file=api&v=2&key=> &amp;v=2&amp;key="></script>

 </head> 
 <body> 
   <div style="width:100%; height:100%" id="map"></div> 
   <script defer="defer" type="text/javascript"> 
   biskurl = "http://" <http:///>  + window.location.host + "/"; 
   map = new OpenLayers.Map('map',{ 
     projection:'EPSG:900913', 
     maxResolution:156543.0339, 
     units:'m', 
     numZoomLevels:20 
   }); 
   layerSwitchControl = new OpenLayers.Control.LayerSwitcher(); 
   map.addControl(layerSwitchControl); 
   var layer = new OpenLayers.Layer.Google( "Satelliet" ,
{'sphericalMercator':true, type: G_SATELLITE_MAP}); 
   layer.addOptions({ 
     isBaseLayer: true, 
     buffer: 1, 
     // without this line I never get out of Africa when zooming in 
     maxExtent: new
OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34) 
   }); 
   map.addLayer(layer); 
   // this seems to do nothing 
   map.restrictedExtent = new OpenLayers.Bounds(513236.42635, 6779582.22281,
539836.512, 6805952.99756); 
   // add a tilecache layer 
   tilelayer = new OpenLayers.Layer.WMS( 
     'New-tilecache', 
     'http://example.com/cgi-bin/tilecache-2.10/tilecache.cgi?', 
     { 
       layers:'bisk', 
       format:'image/png' 
     }, 
     { 
       isBaseLayer:false, 
       sphericalMercator:true, 
       displayOutsideMaxExtent:true // firebug says maxExtent = -180,-90,
180, 90 
   }); 
   map.addLayer(tilelayer); 
   map.setCenter(513236, 6779582); 
   map.zoomTo(12); 
   </script> 
 </body> 
</html> 

And here is the relevant part of tilecache.cfg: 

[bisk] 
type=MapServerLayer 
layers=Nieuw-ms 
mapfile=/var/www/bisk/html/maps/a.map 
srs=EPSG:900913 
extension=png 
spherical_mercator=true 

And I tried it without any resolutions, with this one: 
resolutions=76.43702827148438,38.21851413574219,19.109257067871095,9.5546285
33935547,4.777314266967774,2.388657133483887,1.1943285667419434,0.5971642833
709717,0.29858214168548586,0.14929107084274293 

And instead of that with: 
maxResolution=156543.0339 

But every tile request, such as: 
http://example.com/cgi-bin/tilecache-2.10/tilecache.cgi?LAYERS=bisk
<http://example.com/cgi-bin/tilecache-2.10/tilecache.cgi?LAYERS=bisk&FORMAT=
image%2Fpng&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=appl
ication%2Fvnd.ogc.se_inimage&SRS=EPSG%3A900913&BBOX=528152.7394125,6780180.1
557938,537936.67903125,6789964.0954125&WIDTH=256&HEIGHT=256>
&FORMAT=image%2Fpng&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTI
ONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A900913&BBOX=528152.7394125,6
780180.1557938,537936.67903125,6789964.0954125&WIDTH=256&HEIGHT=256 

returns the error: 
An error occurred: Current x value 528152.739413 is too far from tile corner
x 528332.738613 

Can anyone point me in the right direction? 

Kind regards, 

Jan 

--

Jan H. van der Ven

MAGION Industrial Software Solutions

Wolga 5

2491 BK Den Haag

The Netherlands

Mobile : + 31 (0)6 - 55361734

Phone : +31 (0)70-4442770

Fax : +31 (0)70-4442082

E-mail : j.vanderven at MAGION.nl <mailto:j.vanderven at MAGION.nl>

Web : www.MAGION.nl <http://www.MAGION.nl>

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