i dont understand how to let the program know if im working with a point layer, a line layer or a poligon layer. the program allows me to have all kinds of elements in one file. how do i deal with this?
thanks a lot for the help
i dont understand how to let the program know if im working with a point
layer, a line layer or a poligon layer. the program allows me to have all
kinds of elements in one file. how do i deal with this?
thanks a lot for the help
Grass allows all types of vector geometry to exist as one vector map; you may edit
and change the attributes of any point, line, area, boundary, and centroid as you wish.
Many Grass vector modules have a 'type' parameter that lets you control what vector
geometry you wish to modify (i.e., type=line, type=point, etc.).
Can you explain the specific problem you're encountering? Please list the exact commands
you entered.
~ Eric.
the program will know the types of geometry you are working with in
the file, based upon the type you digitize into it.
if you use v.digit and add "lines", it will be aware of lines and
report them with v.info or after it is built for topology when exiting
v.digit.
If you add boundaries, it will expect a centroid to be in the
boundary, and the boundary to be closed. It turns green when it is
'proper'.
when you have a boundary and a centroid, and it exits/builds, it will
report the areas, which will be your polygons.
On 5/28/08, Isabel Alfaro Cardozo <isabelalfaro@gmail.com> wrote:
i dont understand how to let the program know if im working with a point
layer, a line layer or a poligon layer. the program allows me to have all
kinds of elements in one file. how do i deal with this?
thanks a lot for the help