[Tilecache] tiles outside of extent

[Bart van den Eijnden (OSGIS)]

Hi list,

when requesting a tile which is outside of the maxExtent, I get the
following error:

An error occurred: couldn't calculate tile index for layer AAA216 from
([0.0, -58400.935286, 358400.93528600002, 300000.0])
  File "/var/www/cgi-bin/tilecache-1.6/TileCache/Service.py", line 401, in
modPythonHandler
    host )
  File "/var/www/cgi-bin/tilecache-1.6/TileCache/Service.py", line 380, in
dispatchRequest
    tile = WMS(self).parse(params, path_info, host)
  File "/var/www/cgi-bin/tilecache-1.6/TileCache/Service.py", line 115, in
parse
    return self.getMap(param)
  File "/var/www/cgi-bin/tilecache-1.6/TileCache/Service.py", line 122, in
getMap
    raise Exception(

which results in a red cross image in OpenLayers.

Is there a way to get around this? Maybe have blank images returned?

Best regards,
Bart

--
Bart van den Eijnden
OSGIS, Open Source GIS
http://www.osgis.nl