[GRASS-user] New User
razmjooeis at faunalia.co.uk
Mon Feb 28 06:57:04 EST 2011
If you are intending to use GIS for visualization and data conversion,
maybe better to use something easy to start off, like QGIS:
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
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?
> or matlab's mapping toolbox? (which is using proj4, same as us)
> do you wish to rasterize the natural earth polygons into a 2D
> see v.to.rast + r.out.mat
> do you want to bring your matlab data into grass and plot it
> 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.
> grass-user mailing list
> grass-user at lists.osgeo.org
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