[GRASS-user] any tips/advice for workign with MODIS data?

[mhall at berkeley.edu]

Hi,

I've been trying for 2 or 3 days now to get some nice looking images out
of MODIS TERRA/AQUA 500m land products (ie 7 bands).  I've seen the screen
shots and see the quality of the images that can be obtained--but at best
I
some very faded/obscured images.  I've loaded the data into GRASS
using HEGTool to convert the HDF file to separate bands.  I've then loaded
that and tired combining Bands 143 (RGB) using r.composite.  I've tried
using r.colors' standard grey scale and grey.eq before making the composite
image.  My values for the images ranges from -28672 to approx. 9000 .

I've tried rescaling the data to get it between 0 and 255, and the
resulting image quality is equally bad.

Any suggestions on what to try next?

I've checked the data out in other programs that are in other research
groups and the data makes nice RGB images--so nothing wrong with the
source data.

Best, Mark Hall