[GRASS-dev] How to calculate mean coordinates from big point datasets?
Markus Metz
markus.metz.giswork at gmail.com
Sun Sep 22 08:06:14 PDT 2013
Markus Neteler wrote:
> Hi,
>
> I came across this question:
>
> http://gis.stackexchange.com/questions/71734/how-to-calculate-mean-coordinates-from-big-point-datasets
Please try the new addon v.centerpoint [0]. It calculates various
center points for point clouds, lines, and areas. Standard options are
the geometric mean (center of gravity) and geometric median (more
robust for outliers). There are additional options to calculate center
points for points, lines and areas, explained in the manual. The
geometric medians (points of minimum distance to all other points) are
approximations, but fairly accurate and very fast. I would be
surprised if any other GIS software can calculate these center points.
Markus M
[0] http://grasswiki.osgeo.org/wiki/AddOns/GRASS7/vector#v.centerpoint
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