Hello all,
Is it possible to use the geometry of an object to populate a column, on the
fly or otherwise? If for example I want to get the area of a polygon or the
bearing/direction of a line how could I access the geometry to do this?
--
Rhys
Peace & Love | Live Long & Prosper
"It has been said that man is a rational animal. All my life I have been
searching for evidence which could support this."
Bertrand Russell
Is it possible to use the geometry of an object to populate a column,
on the fly or otherwise? If for example I want to get the area of a
polygon or the bearing/direction of a line how could I access the
geometry to do this?
v.to.db to store eg area in a column
also
v.build option=... to dump topology
bearing/direction of a line is hard as a "line" in GRASS is really an
"arc" or a series of vertices, not a single Point A -> Point B.
Hamish