[GRASS-user] r.stream.extract Syntax Problem

[Margherita Di Leo]

Rich,

On Mon, Apr 9, 2012 at 10:07 PM, Rich Shepard <rshepard at appl-ecosys.com>wrote:

> On Sat, 7 Apr 2012, Margherita Di Leo wrote:
>
>  Do you produce any null cells when you weight the flow acc? I'm not sure
>> but I guess this could also be a problem (?)
>>
>
> madi,
>
>  I don't know. How do I determine if null cells are produced (look at
> r.null.fill output, perhaps)?


You said you produce the accumulation map by:

r.mapcalc "elevation.10m.acc.weighed = elevation.10m.acc * weight"

The map namely weight shouldn't have null values (use r.null to set null
values to zero).

Best,
madi

-- 
Ing. Margherita Di Leo, Ph.D.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/grass-user/attachments/20120409/e580a285/attachment.html