[GRASS5] Problems with importing HDF to 4.3

[Markus Neteler]

Hi Juhana,

On Thu, Nov 29, 2001 at 05:59:26PM +0200, juhana nieminen wrote:
> Dear list,
> 
> There seems to be something strange with the importing of HDF's into
> Grass4.3 - the data in the imported image seems to be transformed for
> some reason. Below is a sample of values shown at the same points first
> using an external HDF viewer (HDF-look/Msphinx) and then in GRASS. I
> don't see any logic between the input and output values... any ideas?
> 
> 
> > Msphinx   GRASS
> > 
> > 6971     15131
> > 6014     32279
> > 5922      8727
> > 5775     36630
> > 5771     35606
> > 5556     46101
> > 5409      8469
> > 6062     52247
> > 5663      7958
> > 5287     42772
> > 5504     32789
> > 5080     55315
> 
> 
> Thanks,
> Juhana

well, HDF is a problem currently. The 4.3 support HDF3.2 (as far as I
remember), meanwhile HDF5 is out. Which sort of data do you import?
I am working with ASTER sometimes, the come in HDF-EOS (just another HDF).
For that no direct support is present yet, we all hope for GDAL (fundings
directly to Frank Warmerdam please).

Meanwhile you may use the "hdf2bin" program which is available from
here:
http://glcf.umiacs.umd.edu/library/software/HDFtoBG.html

Then use r.in.bin (but in GRASS 5!). That's a working solution which
needs some extra efforts for most as it is only availabe on Windows and
Solaris. I have received the source code from them, but wasn't able to
manage the compilation on Linux yet. 
If you all write to them, they may release a Linux version, too...

All the data formats are a bit annoying, but we have to live with
this fact.

Good luck,

 Markus