[mapserver-users] Re: Image shrinking problem
Juozas Urbonas
juozas.urbonas at teltonika.lt
Tue Feb 26 23:01:06 PST 2008
I'm sorry, I forgot to mention, that I'm creating GDAL driver, which I'm trying to use with MapServer.
Here is the gdalinfo for my map:
Driver: AkisAx/Akis Map Link (.mln)
Size is 60879, 47344
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
TOWGS84[0,0,0,0,0,0,0],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9108"]],
AXIS["Lat",NORTH],
AXIS["Long",EAST],
AUTHORITY["EPSG","4326"]]
Origin = (20.660000000000000,56.659999999999997)
Pixel Size = (0.000104141001002,-0.000059352821899)
Corner Coordinates:
Upper Left ( 20.6600000, 56.6600000)
Lower Left ( 20.6600000, 53.8500000)
Upper Right ( 27.0000000, 56.6600000)
Lower Right ( 27.0000000, 53.8500000)
Center ( 23.8300000, 55.2550000)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
Overviews: arbitrary
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
Overviews: arbitrary
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue
Overviews: arbitrary
And layer section from MapServer's .map file:
LAYER
NAME Lietuva
TYPE RASTER
DATA 'D:\Programs\AkisAX-trial\Lietuva.mln'
MAXSCALE 3000000
MINSCALE 50000
METADATA
'wms_title' 'Lietuva'
'wms_srs' 'epsg:4326'
END
STATUS ON
TRANSPARENCY 100
PROJECTION
'proj=longlat'
'ellps=WGS84'
'datum=WGS84'
'no_defs'
END
DUMP TRUE
END
Hope someone can help me.
Juozas.
----- Original Message -----
From: Juozas Urbonas
To: mapserver-users at lists.osgeo.org
Sent: Tuesday, February 26, 2008 11:12 AM
Subject: Image shrinking problem
Hi All,
When I'm requesting some image using WMS, my overridden IRasterIO gets called with nBufXSize and nBufYSize nearly double the size I'm requesting in WMS call and in the process image returned by WMS gets shrinked. What may cause this problem?
I'm expecting nBufXSize and nBufYSize to be approximately the same size as in WMS request.
Thanks for any help.
Juozas.
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