[mapguide-users] MrSID problem: RasterIO skipped for odd window or buffer size

[Frank Warmerdam]

G.E.O.-Consulting / Hans Morschell wrote:
> Hallo,
> 
>  
> 
> I installed the MGOS RC2 (WinXP) with the gdal patches for MrSID, images 
> are not displayed.
> 
>  
> 
> I have set the CPL_DEBUG on and I got the following result:
> 
>  
> 
> GDALOpen succeeds as MrSID for all images, but then I get the message:
> 
>  
> 
> RasterIO<> skipped for odd window or buffer size

Hans,

Normally this means a zeroed sized, negatively sized or off-raster area
was requested in the RasterIO().  The zero sized area can easily happen
in real use if you zoom in to a fraction of a pixel.

Were there any preceeding debug messages, perhaps indicating the window?

What is your map view extent?  What does gdalinfo report for the mrsid file?
gdalinfo is a commandline utility that is part of FWTools -
  http://fwtools.maptools.org/

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGeo, http://osgeo.org