[GRASSLIST:2684] Re: extracting vector attributes

[Radim Blazek]

On Wednesday 18 February 2004 16:53, Christopher Fonnesbeck wrote:
> I am trying to determine the area of each polygon in a layer, and store
> this statistic as a column in the attribute table (my vector attributes
> are stored in MySQL). There appears to be no vector function in the
> reference manual that provide this function, but I'm sure there must be
> something that does this. Please point me in the right direction.

v.to.db option=area

More precisely/generally, it does not update each row in the table by area size 
of each polygon, but by the sum of area sizes of all polygons with the same category.


Radim