[Tilecache] too far from tile corner

Thu Aug 27 08:37:41 EDT 2009

Hi Jan,

I recall similar issues of getting stuck in Africa.   Back then, there was a lot of different things I was trying so I can't pinpoint exactly what did it for me.  Here are my OL map options:
options = {
            projection: new OpenLayers.Projection("EPSG:26917"),
            maxExtent: new OpenLayers.Bounds(640541.774843334, 4755587.40501464, 667085.402317306, 4779623.23729788),
            units: "m",
            tileSize: new OpenLayers.Size(256, 256),
            resolutions: [850, 425, 212.5, 106.25, 53.125, 26.5625, 13.28125, 6.640625, 3.3203125, 1.66015625, 0.830078125, 0.4150390625, 0.20751953125, 0.103759765625, 0.0518798828125],
.......  controls, themes, etc...
};

Then, for TileCache:

[wmsLayer]
type=WMS
url=http://wmsUrl
layers=layerName
extension=png
mime_type=image/png
resolutions=850,425,212.5,106.25,53.125,26.5625,13.28125,6.640625,3.3203125,1.66015625,0.830078125,0.4150390625,0.20751953125,0.103759765625,0.0518798828125
bbox=640541.774843334, 4755587.40501464, 667085.402317306, 4779623.23729788
metaTile=true
metaSize=7,7
srs=EPSG:26917

Perhaps try putting your own values in place of resolutions,bbox, maxextent and projection/srs to see what happens.

Shawn
>>> On 8/27/2009 at 2:37 AM, "Jan van der Ven" <j.vanderven at magion.nl> wrote:
Hi Shawn,

Thanks for the quick reply. I followed your suggestion, but the error is the same.
Christopher Schmidt told me in the #openlayers that I should not have maxExtent at all, but then I get stuck in Africa, when I try to zoom to Europe. So that is why I added the whole world as a maxExtent.

Do you have another suggestion?

Kind regards,

Jan

From: Shawn Oatley [mailto:shawn at niagarafalls.ca] 
Sent: Wednesday, August 26, 2009 15:15
To: j.vanderven at magion.nl; tilecache at openlayers.org 
Subject: Re: [Tilecache] too far from tile corner

I had a similar problem in the past and if I recall, it was a matter of specifying the resolution in both the OL constructor and the TC config.  Plus, make sure the maxExtent in your OL constructor matches the TC bbox parameter.  

Shawn
>>> On 8/26/2009 at 8:21 AM, "Jan van der Ven" <j.vanderven at magion.nl> wrote:
  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&amp;v=2&amp;key=" ( http://maps.google.com/maps?file=api&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=76.43702827148438,38.21851413574219,19.109257067871095,9.554628533935547,4.777314266967774,2.388657133483887,1.1943285667419434,0.5971642833709717,0.29858214168548586,0.14929107084274293 

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&FORMAT=image%2Fpng&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A900913&BBOX=528152.7394125,6780180.1557938,537936.67903125,6789964.0954125&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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