[GRASS-user] filtering raster clumps before r.to.vect

Hi, From a classification process we are developing, we created a unsupervised classification from the image. We then want to select random locations from the unsup raster as a training area for the 2nd level of classification. I think it can be done by: r.to.vect, v.random, v.extract. The

Re: [GRASS-user] gps import: definition of WGS84

I have finally come around to looking at this issue again... On Mon, May 26, 2008 05:01, Hamish wrote: Moritz Lennert: strictly speaking the projection (lcc) is there and fine, but (AFAIU) the datum transform params for a given datum are left out if there are more than one option in the

[GRASS-user] v.centroids (duplicate centroids and areas without centroid)

Hi everybody, I have a problem using v.centroids: I created a map of landscape fragmentation by roads and other linear features, then converted the lines to boundaries with the command v.type input=grenzen2 output=grenzen3 type=line,boundary --overwrite In the next step I cleand up the

Re: [GRASS-user] skripting with xargs: bug or feature ?

[EMAIL PROTECTED] wrote: I just stumbled over this one: For some reason, xargs can't be used when LOTS of filenames have to be concatenated in a GRASS script. The example attempts to collect all raster layers with a 6-character name to stack them into a volume. g.mlist type=rast

[GRASS-user] using v.line.center

Hi list, in order to use *v.line.center* properly I use* v.category* to adjust category assignment. As a result I get: GRASS 6.2.2 (admeurop): v.category in=bound1 layer=2 out=boundary1 --o WARNING: The vector 'boundary1' already exists and will be overwritten. 116 new centroids placed in

[GRASS-user] import satellite data in Grass

Hi, I'm new with Grass and I don't have somebody around me knowing well Grass and besides all the documentation and tutorials that I've found, I have some beginner questions... I have several satellite data sets, that I would like to import in Grass. These sets are: - devpan_2000_mos.tif,

Re: [GRASS-user] slope curvature algorithm - adjust the kernel size

Hi Bob, below answers from Helena and Jaro Markus On Wed, Jun 4, 2008 at 2:27 AM, [EMAIL PROTECTED] wrote: Jaro Hofierka wrote: I think r.param.scale is the module that this guy is looking for. that is right. In case he is working with the latest lidar data for California, I think we have

Re: [GRASS-user] filtering raster clumps before r.to.vect

On Wed, Jun 4, 2008 at 1:01 PM, maning sambale [EMAIL PROTECTED] wrote: Like filtering the raster to include only large clumps from a randomly selected points before r.to.vect? You can try r.neighbors with method=mode and play with the size parameter. Markus

[GRASS-user] r.sun2: Wh or kWh?

Dear list, in the file description.html of the module r.sun2 under the section OPTIONS it is stated: In the second mode daily sums of solar irradiation [kWh.m-2.day-1] are computed for a specified day. Should it be [Wh.m-2.day-1] ? Together with friends we created global daily radiation maps

[GRASS-user] Impressive GRASS web sites statistics

Dear Community, just to update you on the Web stats development, here the grass.osgeo.org statistics (remember, we have MANY mirror sites): Month Unique visitors Number of visitsPages HitsBandwidth Jan 200839223 74088 291166 715946 101.23 GB Feb 200838984

Re: [GRASS-user] r.sun2: Wh or kWh?

Hi Nikos, AFAIK r.sun2 calculates the daily global irradiation as [kWh].[m-2].[d-1] unfortunately I cannot check it because, at the moment, I don't have GRASS installed; but we could simply confirm this by checking the values given by r.sun2 just give me an example of returned data from given

Re: [GRASS-user] supervised classification - feature extraction

On Sat, May 31, 2008 15:23, M S wrote: That would be great. Let's say for example that I only want to classify paved or dirt roads. So I setup two classes, one training area for dirt road, and one for paved road. Then a third outlier class of everything else that doesnt match the two

RE: [GRASS-user] (no subject)

Hi Dylan, It looks like r.param.scale is the module he's looking for...thanks! Bob -Original Message- From: Dylan Beaudette [mailto:[EMAIL PROTECTED] Sent: Tuesday, June 03, 2008 2:32 PM To: grass-user@lists.osgeo.org Cc: Moskovitz, Bob Subject: Re: [GRASS-user] (no subject)

RE: [GRASS-user] slope curvature algorithm - adjust the kernel size

Hi Markus, I do have the 3rd edition of your book, but it seems like r.param.scale is not in your book (at least I don't see a reference in the index). Since we do have lidar, I'd like to take a look at Helena's IEEE paper. Is it (or a preprint) available on the internet? Also I wanted to

Re: [GRASS-user] slope curvature algorithm - adjust the kernel size

Hi Bob. On Wed, Jun 4, 2008 at 11:09 PM, Moskovitz, Bob [EMAIL PROTECTED] wrote: Hi Markus, I do have the 3rd edition of your book, but it seems like r.param.scale is not in your book (at least I don't see a reference in the index). You find it on pages 149/150. Since we do have lidar,

[GRASS-user] Re: grass-user Digest, Vol 26, Issue 8

The big jump in unique hits seems to correspond more or less with the release of the new GRASS for Windows installer. Michael On 6/4/08 1:49 PM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Message: 8 Date: Wed, 4 Jun 2008 22:24:33 +0200 From: Markus Neteler [EMAIL PROTECTED] Subject:

Re: [GRASS-user] r.sun2: Wh or kWh?

On Wed, 2008-06-04 at 22:49 +0200, Marco Pasetti wrote: Hi Nikos, AFAIK r.sun2 calculates the daily global irradiation as [kWh].[m-2].[d-1] unfortunately I cannot check it because, at the moment, I don't have GRASS installed; but we could simply confirm this by checking the values given by

Re: [GRASS-user] raster data to ascii

Martina Schaefer wrote: I have another question regarding raster data. I have some raster data on a 1000x1000 grid. I would like to export it with various gridspacings, for ex. 500x500 or 200x500. I'm bit lost between r.statsm r.out.ascii, the interpolation methods and r.resample. Either

Re: [GRASS-user] r.sun2: Wh or kWh?

Nikos: r.mapcalc global_daily_avg_kJ=int(global_daily_avg * 3,6) does r.mapcalc support comma as decimal sep or is that 3,6 a typo? Hamish ___ grass-user mailing list grass-user@lists.osgeo.org

Re: [GRASS-user] raster data to ascii

Glynn: r.resample makes a direct copy of its input, resampled using GRASS' built-in nearest-neighbour resampling, so r.resample only has limited utility. [AFAICT, it's primary use is to reduce disk space and/or CPU usage. If you will be reading a map repeatedly at a significantly reduced

Re: [GRASS-user] using v.line.center

Manuel Sangiao wrote: in order to use *v.line.center* properly I use* v.category* to adjust category assignment. As a result I get: GRASS 6.2.2 (admeurop): v.category in=bound1 layer=2 out=boundary1 --o Number of lines : 0 Number of boundaries: 592 Then I use *v.line.center*

Re: [GRASS-user] import satellite data in Grass

Martina Schaefer wrote: I'm new with Grass and I don't have somebody around me knowing well Grass and besides all the documentation and tutorials that I've found, I have some beginner questions... I have several satellite data sets, that I would like to import in Grass. These sets are: