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

Am 27.06.2011 um 02:56 schrieb jentjr: All, I am trying to use r.stream.extract with the National Hydrography Dataset Plus, which includes elevation, flow direction and flow accumulation maps. I recently read the paper by Jasiewicz and Metz that states, ...network modeling is based on

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

On Mon, Jun 27, 2011 at 8:03 AM, Johannes Radinger jradin...@gmx.at wrote: Am 27.06.2011 um 02:56 schrieb jentjr: All, I am trying to use r.stream.extract with the National Hydrography Dataset Plus, which includes elevation, flow direction and flow accumulation maps. I recently read the

Re: [GRASS-user] Re: Drivetime Isochrones

On Sat, Jun 25, 2011 at 8:02 PM, RKiTect evan.apos...@gmail.com wrote: i think i have figured out where my problem lies. It is in the centre node costs... from the manual is says right at the top that centre node must be opened (costs = 0). however i have not defined costs for the centre node

[GRASS-user] R.sun use

Hi list, I'm trying to create a shadow map of buildings. Well, I have a vector buildings map that I rasterized with Z values. This worked ok. I, then, generated slope map and aspect map -which contains only null values, but that's ok. I'm trying now to generate a shadow map but I'm not able to.

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

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

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

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

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

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

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

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

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

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,

[GRASS-user] Why does g.extension fail...?

Dear grass users I succeeded in installing d.barb the other day. Because d.barb was very wonderful addon, I tried installing to other PC. However, I fail in the installation I tried on the following conditions. (Case 1) ubuntu11.04 wubi version on Windows7 --- Success (Case 2)

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

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:

Re: [GRASS-user] Why does g.extension fail...?

sgw00412 wrote: I succeeded in installing d.barb the other day. Because d.barb was very wonderful addon, thanks! beware some things don't work properly yet, e.g. the -r flag and u,v from raster maps in certain conditions. Also it seems that it might be a useful feature to have arrow color

[GRASS-user] r.water.outlet and longitude / window issue

Hi GRASS user-list, I think that I have run into a bug in either the computational window definition or the r.water.outlet program (or maybe something else) that has to do with defining degrees West as either positive (East-longitude 180) or negative. What happens is that, for example, I type: