[GRASS-user] New User

[Saber Razmjooei]

If you are intending to use GIS for visualization and data conversion,
maybe better to use something easy to start off, like QGIS:
http://www.qgis.org/wiki/Download#Release_2

You have GRASS plugin there if needed. But usually you should be able to
do export the files to other OGR/GDAL supported formats from within
QGIS.

Regards
Sab

On Sun, 2011-02-27 at 23:25 -0800, Hamish wrote:
> Thomas wrote:
> > I am a new user, just discovered grass and OSGeo. My current
> > interest is accessing the files from NaturalEarthData,
> > converting them into matlab format, and, using octave to
> > manipulate and/or plot.
> > 
> > I use Linux and Unix. Octave 3.4.0, Gnuplot, Grass
> > 6.4.0.  This workstation has Ubuntu 10.04.
> > 
> > I downloaded the
> > 10m-admin-0-countries.zip   and
> > 10m-admin-0-boundary-lines-land.zip files from
> > NaturalEarthData.
> > 
> > I want to use grass to display some portion of the data.
> > 
> > Then, use r.out.mat to generate a octave compatible binary
> > file.
> > 
> > I started looking at the manual, but, quickly became
> > confused.
> 
> that would be my fault.
> 
> > Is there a simple how to for what I want to do?
> 
> Could you explain your workflow a bit more? there are many
> choices.   In general it's not so bad, and you can do matlab/oct
> to and from grass without much hassle.
> 
> natural earth is polyline data, so vector & thus v.* modules.
> 2D array is raster data, so r.* modules.
> see v.to.rast and r.to.vect modules.
> 
> 
> do you have 2D arrays in matlab/octave from contourf() or similar
> and you want to fill(), area(), or patch() a polygon coastline
> over the top?
> see  http://grass.osgeo.org/wiki/Addons#v.out.ascii.mat
> 
> are you using the (free/gratis) m_map toolbox?
>   http://www.eos.ubc.ca/~rich/map.html
> or matlab's mapping toolbox? (which is using proj4, same as us)
> 
> do you wish to rasterize the natural earth polygons into a 2D
> array?
> see v.to.rast + r.out.mat
> 
> do you want to bring your matlab data into grass and plot it
> there?
> see r.in.mat, or v.in.lines, v.in.mapgen.
> 
> 
> the first step is to bring the data into grass with v.in.ogr.
> 
> 
> Hamish
> 
> 
> 
>       
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