Stefano:
On the other hand I can't understand why in the man page the section
entitled BUG says: r.drain currently finds only the lowest point
(the cell having the smallest category value) in the input file
that can be reached through directly adjacent cells that are less
than or equal in
Stefano Negri wrote:
I'm a bit confused about r.drain (I'm working with Debian's backport
version 6.2.1). I have noticed that if you give as input in the
coordinate parameter a point that stands on the region's edge,
r.drain won't move from there: it would output a map with that
same single
Thanks for your answers Eric and Hamish.
I had already made sure with d.rast.num and I have double checked now on a
toy map (a slope on a 100x100 grid): even if there are lower value cells
beside a border cell, it won't move from there.
Stefano.
2008/2/15, Hamish [EMAIL PROTECTED]:
Stefano
I'm a bit confused about r.drain (I'm working with Debian's backport version
6.2.1). I have noticed that if you give as input in the coordinate
parameter a point that stands on the region's edge, r.drain won't move
from there: it would output a map with that same single point. Is this a
bug?
On
Hi,
You are right - r.drain will NOT give sane results at region boundary.
Here is snippet from filldir.c:107:
/* determine the flow direction in each cell. On outer rows and columns
* the flow direction is always directly out of the map */
It's a questionable what action r.drain should take if
