[GRASS-user] What algorithm does r.drain use?

[Takenori KANAI]

Hello. I'm sorry by my poor English.

I have analyzed distribution of wild animals using r.drain now
(http://grass.osgeo.org/grass65/manuals/r.drain.html).

Some examples have been described to "EXAMPLES" in an
online manual. In "EXAMPLES", there are two ways of cost
value though the Cost value of fifith step is 10. In this case,
I do not think that there is a problem because there is a
smaller cost value since six steps even if the fifth step
selects either.
  However, by what algorithm has the cell been selected
when there are two or more end points in route
(There is a minimum same cost value as surroundings of cell. )?

Thanks


Takenori K.