[GRASSLIST:3201] Re: bathymetry

Hamish hamish_nospam at yahoo.com
Sun Apr 18 04:31:32 EDT 2004

> I am using GRASS 5.0.0 on a mac (10.2.8).  I am not sure what you mean
> by datum support.

for a better explanation than I could give you, see:

> I thought that I specified the datum for a location
> when I set it up.  Do you mean that I can not project across datums
> when using a command like r.proj?

Not with GRASS 5.0.0, maybe there is limmited NAD27 and NAD83 support?
Someone else would have to answer that, but generally no; you need a
newer version of GRASS for r.proj to handle transformations between
different datums correctly.

> the address for this data is here
> http://topex.ucsd.edu/marine_topo/mar_topo.html


Some projection and datum info is here:


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