Re: [GRASS-user] Re: r.stream.extract with external flow accumulation maps

2011-06-28 Thread Markus Metz
On Tue, Jun 28, 2011 at 5:06 AM, jentjr wrote: > It worked! I also tried it without changing the spatial extent of the map and > it worked. So, I just needed to set the null values to zero. > Hmm, this is not such a good idea, the zeros can have interesting effects. Rather create a MASK where eith

[GRASS-user] Re: r.stream.extract with external flow accumulation maps

2011-06-27 Thread jentjr
It worked! I also tried it without changing the spatial extent of the map and it worked. So, I just needed to set the null values to zero. Thanks for the patience, Justin Jent -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/r-stream-extract-with-external-flow-accumulatio

Re: [GRASS-user] Re: r.stream.extract with external flow accumulation maps

2011-06-27 Thread Jarek Jasiewicz
On 06/27/2011 05:12 PM, Mark Seibel wrote: I believe that the flow accumulation grid was produced using ArcHydro. I put the link to the data set that I am using below if anyone wants to try it out. Hi. Not sure if this is the issue, but I recall this from the manual. " accumulation Input map,

Re: [GRASS-user] Re: r.stream.extract with external flow accumulation maps

2011-06-27 Thread Mark Seibel
> I believe that the flow accumulation grid was produced using ArcHydro. I put > the link to the data set that I am using below if anyone wants to try it > out. Hi. Not sure if this is the issue, but I recall this from the manual. " accumulation Input map, optional: Accumulation values of the pr

[GRASS-user] Re: r.stream.extract with external flow accumulation maps

2011-06-27 Thread jentjr
I also tried that by first setting the region equal to the elevation map and then using r.mapcalc to create a new accumulation map. Both the elevation and accumulation maps have the same spatial extent and resolution, but I still get the error. I believe that the flow accumulation grid was produce

Re: [GRASS-user] Re: r.stream.extract with external flow accumulation maps

2011-06-27 Thread Jarek Jasiewicz
On 06/27/2011 01:44 PM, jentjr wrote: Thank you for the replies. I set the region to the flow accumulation map, and I still received the error though. Here is the region output for both the elevation and flow accumulation maps Elevation: GRASS 6.4.1 (NAD83_GRS80_LCC):~> g.region -p rast=elev_c

[GRASS-user] Re: r.stream.extract with external flow accumulation maps

2011-06-27 Thread jentjr
Thank you for the replies. I set the region to the flow accumulation map, and I still received the error though. Here is the region output for both the elevation and flow accumulation maps Elevation: GRASS 6.4.1 (NAD83_GRS80_LCC):~ > g.region -p rast=elev_cm@hydrology projection: 99 (Lambert Con