Dear Grass users,
I have a simple problem for which there is probably a trivial solution or even
a dedicated Grass function by I haven't been able to find it yet.
I am working in area for which I have a vector map of the bedrock geology and
another vector map with a larger number of small basins. For each of these
basins I would like to know the area (or percentage of the total basin area)
that is occupied by the different geological units, and directly upload this
result in the attribute table of the basins vector map (one column for each
geological unit giving its area inside the basin or percentage).
Is there a simple way to do that with Grass?
Thanks in advance,
Vincent
On Sun, 2 Jan 2011, Vincent Godard wrote:
I have a simple problem for which there is probably a trivial solution or even
a dedicated Grass function by I haven't been able to find it yet.
Vincent,
Take a look at v.overlay.
I've used it to calculate the area of a drainage basin contributing runoff to
a defined point on a stream and will be applying it to the same situation
you have: define the percentage of rock types, soils, and vegetation in a
defined drainage.
Rich