[mapserver-users] TIFF/GeoTIFF and World Files

[Chris Stuber]

MapServer Folks,

Back on the topic of raster images...   In the past, I have manually created a 
world file to go with my raster images.  I ran across a dataset (actually it is
software) that generates GeoTIFF output.  The GeoTIFF file contains 
GeoKeyDirectories with the following keys/values defined for each image:

     KeyDirVersion: 1, KeyMaj/MinRev: 1/2
     NumKeyDirKeys: 12
     GTModelTypeGeoKey: 2 (ModelTypeGeographic)
     GTRasterTypeGeoKey: 1 (RasterPixelIsArea)
     GeographicTypeGeoKey: (value always NAD83 or WGS_84 [virtually the same
datum]) 
     GeogPrimeMeridianGeoKey: 8901 (PM_Greenwich)
     GeogAngularUnitsGeoKey: 9102 (Degrees)
     ProjectedCSTypeGeoKey: 32767 (UserDefinedVal)
     ProjectionGeoKey: 32767 (UserDefinedVal)
     ProjCoordTransGeoKey: 8 (currently always CT_LambertConfConic [could
change]) 
     ProjStdParallelGeoKey: (value = Standard Parallel closest to equator)
     ProjStdParallel2GeoKey: (value = Standard Parallel furtherest from equator)
     ProjNatOriginLatGeoKey: (value = Mid Latitude)
     ProjCenterLongGeoKey: (value = Central Meridian)

Now, my question is... to what degree does mapserver support GeoTIFF?  Will
mapserver
read these GeoTIFF attributes?  Do I still need to create a world file to match
the
image?    By default, no ".tfw" is generated from this software.....   If a
world file
*is* required, can it computed from the GeoTIFF Header information??     There
will be
quite a few images, and I can't image having to manually create world files for
each.

Thanks,

Chris Stuber (mapsurfer)
Silicon Mapping Solutions, Inc.