Moritz Lennert a écrit :
On 12/02/09 04:15, Dylan Beaudette wrote:
On Wed, Feb 11, 2009 at 5:03 PM, Dylan Beaudette
<debeaude...@ucdavis.edu> wrote:
On Wednesday 11 February 2009, MORREALE Jean Roc wrote:
Hamish a écrit :
Kurt Springs wrote:
Does anyone know how to do Thiessen Polygons in GRASS?
I need to use them around various types of megalithic tomb
sites that are in point vector files.
v.voronoi
there is some replacement test code to look at in grass-addons as
well:
http://trac.osgeo.org/grass/browser/grass-addons/vector/voronoi
While we are on this topic, is there a way to get a weigthed voronoi
diagram using grass ?
The ability to rank a point to tune the area's influence would be
great,
for that purpose I've been using an arcgis'extension* but with grass it
is not possible**. Is there a way to get a similar result ?
*http://www.geog.unt.edu/~pdong/software.htm
**http://osdir.com/ml/gis.grass.user/2004-04/msg00036.html
Regards,
MORREALE Jean Roc
Now that I have read about 'weighted voronoi diagrams',
One version of such diagrams are Reilly surfaces [1],[2] used in retail
geography to identify the influence/attraction zone of a city, often
depending on population size.
I didn't knew about it, I'll try look for the reference you gave thank.
My aim is quite similar to your example as it consists in balancing the
influence zone of a archeological settlement, not by the estimated
population, but by a factor resulting from the amount of data collected
(historical&material).
Regards,
MORREALE Jean Roc
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