[GRASS-dev] How to calculate mean coordinates from big point datasets?
Glynn Clements
glynn at gclements.plus.com
Tue Sep 24 00:03:28 PDT 2013
Markus Metz wrote:
> 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)
That's the arithmetic mean.
The geometric mean of a set of N values is the Nth root of the product
of the values (i.e. the logarithm of the geometric mean is the
arithmetic mean of the logarithms of the values). It wouldn't be
meaningful to compute the geometric mean of coordinate data.
--
Glynn Clements <glynn at gclements.plus.com>
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