proportionate lines

GRASS GRASS user
1

Hello !

Is it possible to create lines whose width is proportionate to a given
value ? Not only of different widths but really proportionate ?

I am trying to create maps of human migrations and would like to
symbolize the flows with proportionate lines.

Moritz

2

Moritz Lennert wrote:

Hello !

Is it possible to create lines whose width is proportionate to a given
value ? Not only of different widths but really proportionate ?

I am trying to create maps of human migrations and would like to
symbolize the flows with proportionate lines.

Moritz

Yes, you can use ps.map.new with vector options cwidth,
coffset and ref. See man page.

Radim

3

Radim Blazek <Radim.Blazek@dhv.cz> wrote:

Moritz Lennert wrote:
>
> Hello !
>
> Is it possible to create lines whose width is proportionate to a
given
> value ? Not only of different widths but really proportionate ?
>
> I am trying to create maps of human migrations and would like to
> symbolize the flows with proportionate lines.
>
> Moritz

Yes, you can use ps.map.new with vector options cwidth,
coffset and ref. See man page.

Radim

Thanks, works great !

I only have one problem: in the .ps output file there are lines across
the entire map that are not in the original vector file. Any idea of
what could be the cause ?

Moritz