[GRASS-user] Convert 32bit geotiff to a 16bit tiff file

[ixtract]

hello grass members,

i am no specialist in gis-software-usage and file fomrat coneversion. but
for a project in 3d i have the files from this website
(http://deepreef.org/bathymetry/65-3dgbr-bathy.html)
you find the GMT/netCDF bathymetry grid [zip] 1.1 GBytes which is a 32bit
geotiff with the necessary bathymetry hights. i need thise file to be
concerted to a 16 bit file for the usage in e.g. cinema4d which can only
read 16nit files. but the problem is, that i do not no how to convert it
with the right grass export adjustments so the tiff file keeps it's constant
black to white gradient.

i always end up with a 16 bit file which is shaded from the origin of 0
meters hight. that meens thet for every value above 0 the shadiong is from
black to grey for higher values but for every hight below 0 the gradient
range will start from white to gray so ther is a sharp cut at 0 meters and
not like the greyscale you see on the webpage. does anybody know how this
tiff could be converted to a regual grayscale starting from black (minimal
hight) to white (maximal height?)

thank you, ixtract
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