1-bit tiff rendering

GIRAUD Pierre bluecarto at FREE.FR
Tue Sep 14 11:55:45 EDT 2004


  Hi list,

I do have B&W tif's (1-bit coded), and when I want to get those rendered
by mapserver, I obtain bad restitution within some zoomscales. The map
image is also B&W. I would prefer it to be in greyscale.
Can I easily do this with mapserver.

To have this working, I transformed my tiff manually with photoshop to
have an 8-bit greyscale image. Can I do this easily with the libtiff tools ?
And then I applied gdaladdo to get overviews. This last operation seems
to be necessary to have a good rendering.

Did some of you have similar problems and got it work ?

Pierre GIRAUD



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