[GRASS-user] center of gravity: solution

[Achim Kisseler]

>
> beware it will only be "valid" for small ranges of latitude.
>
> otherwise the weights of the longitudes at high latitudes will
> have more weight in the average than they should.
>

Hi Hamish,

yes, you are right.

In this case the area had to be projected in a projection, where every
raster-cell has the same size.

Otherwise a "lat-depending" weighting could help... I will try it soon.

Thanks for your comment,
Achim