Tif an wld file problems

[Robert Chavez]

That was the problem. I saved it as an uncompressed 8-bit and it works jut
fine.  Thanks for the tip!

Rob

On Wed, 16 Feb 2000, Doug Nebert wrote:

> It is possible that you have a 24-bit TIFF file.  It will only 
> render if it is 8-bit, or so I experienced a few months back.
> Try again by saving the TIF as 8-bit and see what happens.
> 
> Doug.
> 
> Robert Chavez wrote:
> > 
> > Greetings,
> > 
> > I started fooling around with displaying tifs using mapscript and I'm
> > having a problem rendering a tif image layer.  I've run the demo package
> > and displayed the landsat tif with mapserver just fine, so I know
> > mapserver/script compiled with the tif libraries.
> > 
> > The tif originally had a .tfw  file so I changed the extension to
> > .wld (it looks like this, units are in meters)
> > 
> > 1.32301253030703
> > 0.00000000000000
> > 0.00000000000000
> > -1.16784976858186
> > 531694.70377556235000
> > 181396.49239035073000
> > 
> > After the script runs I get a blank .gif file as a result, no rendering of
> > the tif in site.  This leads me to believe there's an extent problem
> > somewhere but I'm not sure where.  The image should fit within the extents
> > of the map file (see map file below), I should be getting something even
> > if at a very small scale. I thought .tfw files were structurally identical
> > with .wld files, or have I missed something?
> > 
> > MAP
> >   NAME test
> >   SIZE 500 500
> >   EXTENT 520118.780 175873.500 534426.880 184948.500
> >   UNITS METERS
> >   SHAPEPATH "data"
> > 
> >   LAYER
> >     NAME stpauls
> >     TYPE RASTER
> >     STATUS ON
> >     DATA stpauls.tif
> >   END
> > END
> > 
> > Regards,
> > 
> > Robert Chavez
> > Perseus Project
> > rchavez at perseus.tufts.edu
> 
> -- 
> Douglas D. Nebert
> Clearinghouse Coordinator 
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