v.vect.stats fits perfect to what I was looking for. Thanks a lot! Am
using the GRASS-Version 6.4 coming out of UbuntuGIS(unstable) and didn't
know about additional tools in the SVN that could be implemented. I
guess the repository is not the latest version of GRASS, though.
That leads to a more general question installation practice for GRASS on
Ubuntu. It seemed the simpliest way to install it though the
UbuntuGIS-repository (apt-get/synaptics). An installation through the
svn-branch would be more up-to-date, but this becomes a local
installation and compatibility with the rest of my System would not be
checked (please correct me if I am wrong here). What is your experience
on this and what would be best-practice for a non-developer? Maybe
somebody of the developers also knows how often the UbuntuGIS(unstable)
repository is being updated concerning GRASS. This seems to be a
relevant question for people who want to start with GRASS, as I just did.
Thanks and kind regards,
Patrick
On 27.08.2010 18:01, Markus Metz wrote:
Patrick_schirmer wrote:
Dear all,
Unfortunately I am not really used to work with GRASS so this might be a
rookie-question. But I am not able to solve it alone, don't find any hint on
the net and thus will need your help:
I got a map of polygones and a map of points. My aim is to sum up the
attributes of a defined column in the point-map to the polygone where they
are lying in. So what I am looking for is a function saying 'spatial join'
of polygons and points with the options 'contains' by using the function
'sum'. The only thing I can find will be v.what.vect. which will allow to
give the point the value of the polygone, but not the other way round.
Is there a simple solution to that question within GRASS6.4? (I think QGIS
is having this option, but I would like to solve it within GRASS6.4).
Try v.vect.stats from grass-addons, this would do the job in one step,
optionally updating polygon attributes with statistics calculated on
point attributes per polygon.
svn checkout https://svn.osgeo.org/grass/grass-addons/vector/v.vect.stats
Markus M
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