[GRASSLIST:2685] Re: extracting vector attributes

[Markus Neteler]

On Wed, Feb 18, 2004 at 10:53:58AM -0500, 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 should do the job:
option=string
    Uploaded value: cat - insert new row for each category if doesn't exist yet area - area size 
length - line length 
count - number of features for each category 
coor - point coordinates 
query - result of a database query for all records of the geometry (or geometries) from table specified by 'qfield' option
    Options: cat,area,length,count,coor,query


http://grass.itc.it/grass51/manuals/html57_user/v.to.db.html

Markus