[GRASS-user] please help review osgeo live dvd summary docs

[Markus Metz]

On Mon, Jul 23, 2012 at 2:32 AM, Hamish <hamish_b at yahoo.com> wrote:
>
> There's a copy of the quickstart in the GRASS wiki. Note that
> when I wrote it there was a GRASS workshop at the targeted FOSS4G
> conference which was going to focus on vector processing, so I
> didn't bother to put much of that in the quickstart. Contributions
> demonstrating some fancy vector usage that makes GRASS special,
> or a common vector task to show how GRASS does it easily, would
> be appreciated. Just note that the quickstarts are intended to be
> quick- i.e. 5-10 minutes worth, so we've got to keep it concise.

An example for vector processing using the basins raster created in
the previous step:

1) convert the basins to vector areas with r.to.vect -v feature=area
2) load average elevation for each basin to the attribute table with
v.rast.stats
3) assign the color table of the raster elevation using average
elevation values to the basins vector with v.colors column=elev_mean
raster=elevation.10m
4) display the vector using the colors in GRASSRGB

BTW, there is no raster map named 'elevation' in the spearfish
dataset, but e.g. 'elevation.10m' as seen in one of the screenshots in
the quickstart. This should be corrected throughout the quickstart.
It seems that the basins in 'Watersheds and streams' were created with
the minimum size of the exterior watershed basin threshold set to
100000 cells, not 10000 cells (missed a zero).
>
>
> In addition, on the disc the QGIS-GRASS bridge is broken because
> of this bug:
>   http://hub.qgis.org/issues/2947
>   https://trac.osgeo.org/osgeo/ticket/868

The live dvd could use sextante for QGIS to access GRASS
functionality. An added bonus would be that sextante has bindings to
several GIS engines, one of them being GRASS, but others should also
be already available on the live dvd.

Markus M