[GRASS-user] Filling an Area Added to Vector Map

[Hamish]

Alex wrote:
> In the GIS vector world you have points, lines and
> polygons. Typically (in most) applications a
> single layer can only be 1 of the 3.

(but in GRASS vector maps you happily keep all 3(+)
types in a single map; for export to shapefile or
other GIS formats you may have to pick just one)

> What you digitized is the outline of an area as a
> line feature. To make a fillable polygon you can
> convert that or redigitize it in it's own
> polygon layer.

it should have been digitized as a boundary
(typically with no category), and a centroid added
somewhere within the area (must have a category
number).

make sure the area is closed (green "X" at the
begin/end node). if not re-edit and move one of the
red "X"s away then back again and allow it to snap.

v.type, v.category, and v.centroids may help, but
be careful not to convert the river network lines
to boundaries too :)


Hamish