[GRASSLIST:3203] Re: bathymetry

[Markus Neteler]

On Sat, Apr 17, 2004 at 02:16:50PM -0700, Ian Macmillan wrote:
> Hamish, thanks for the response.  I am using GRASS 5.0.0 on a mac (10.2.8).  I
> am not sure what you mean by datum support.  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?

Right. For datum transformation support you need GRASS 5.3 or 5.7.

Markus

> > > Hi all, I have been attempting to import the Smith and Sandwell worldwide
> > > bathymetry map, and have been having a lot of difficulty.  The data comes
> > as a
> > > mercator projected file on a sphere with coordinates in latitude and
> > longitude.
> > >  I know the number of rows and columns, and the bounding coordinates (in
> > > lat-long).  How can I import this entire data set?  
> 
> >
> > Which version of GRASS are you using?
> > 
> >
> > To get correct datum support, you will have to use at least version 5.3.
> > This will probably only account for an error of a couple hundred meters
> > though.
> > 
> > Could you post a link to the public data repository? (if there is one)
> > 
> > 
> > good luck,
> > Hamish
> > 

-- 
Markus Neteler     <neteler itc it>       http://mpa.itc.it
ITC-irst -  Centro per la Ricerca Scientifica e Tecnologica
MPBA - Predictive Models for Biol. & Environ. Data Analysis
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