[Gdal-dev] PNG Heightfield

[J Douglas Gough]

I guess that question isn't really appropriate for this list.  Sorry 'bout
that.

----- Original Message ----- 
From: J Douglas Gough
To: gdal-dev at remotesensing.org
Sent: Friday, March 19, 2004 10:48 AM
Subject: [Gdal-dev] PNG Heightfield


I would like to create a heightfield from an ArcInfo grid.  So far, I have
successfully converted an elevation grid to a 16 bit grayscale PNG using
gdal_translate.  I can see the difference in brightness correleates to
height, but I'm stuck here.  I'm thinking I'll need to create a pallette and
lookup table so there are 65,536 possible values.  That should give me
plenty of room to account for -5000 to +5000 meters or some other range that
covers the min/max elevation in meters for any given point.  Just looking
for some tips or examples.

Thanks,

Doug.