[GRASS-user] v.to.rast for a vectorial without Values

[Hamish]

Luisa wrote:
> Before I convert to raster, how can i define all boundaries/with
> Centroids with the same cat value?

do not assign categories to boundaries unless you really need them.

consider two blocks of land next to each other, separated by
a single boundary. To which block of land does the boundary belong
to? Neither. So it has no cat and a centroid in each block
contains that information (along with associated database things
like owner, etc.)

the rare exception is when the boundary which separates them is
a road, and you want that road to have its own attributes (like
pavement type, highway number, number of lanes, etc.)\

type="area" is really a bit of an alias for boundary + its
centroid.


Hamish