Lars I. Nielsen (GisPro) wrote:
Hi,
I'm trying to set up Mapserver as a WMS server, serving multiple
seamless coverages consisting of ECW raster tiles.
My problem is, that the ECW files have been delivered with faulty header
information, and there's too many to fix manually, and the error cannot
easily be remedied programmatically.
However, I have generated TFW files for each tile that are correct, but
how do I force Mapserver to use the TFW files and disregard the faulty
ECW header ?
Lars,
As it happens this is not a unique situation and MapServer itself has some
logic to address it. If you add:
PROCESSING "EXTENT_PRIORITY=WORLD"
to your layer definition, then world files will be searched for in preference
to using the georeferencing returned by GDAL. I'm not sure exactly when this
was incorporated but I imagine it is in 5.4 and later. Also the file extension
should likely be either .eww or .wld, not .tfw for ecw files.
Best regards,
--
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I set the clouds in motion - turn up | Frank Warmerdam, [email protected]
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | Geospatial Programmer for Rent
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