[GRASS-user] problem showing many layers

Hello, I wonder if anyone else has the same problem or if the problem is known: Using wxGUI the monitor has problems with showing all selected layers in the layer list. Very often some are missing. That happens the more often, the more layers are in the list. To handle this, I can change

[GRASS-user] Re: problem using grass.write_comman, db.execute

'db.execute input=-' for stdin only works in grass7. for 6.4+6.5 it is simpler, just omit the input option all together. Hi, What do you mean with omit the input? Like this? grass.write_command('db.execute', stdin = sql_coi_percent) -- View this message in context:

Re: [GRASS-user] label

display=attr ? Achim wrote: thats what I did, but I dont get even simple text did you set attrcol= to the name of the column containing the text from the Labels tab? does disp=cat work? Thats what I also did. I find the label layer I generated with v.label. Here I get this error

Re: [GRASS-user] label

Hello Hamish, now it works. Thank you! Explanation: did you set attrcol= to the name of the column containing the text from the Labels tab? yes does disp=cat work? Yes, that works. BUT: I didnt set disp=attr AND attrcol at the same time. Thats what I missed! (What does not work:

[GRASS-user] Using Overlay

Hi All, I would like to calculate a value of one layer within an area of another raster. For instance, I have a precipitation raster layer that I would like to calculate the median value within each state. v.rast.stats doesn't calculate the median value and neither does v.univar. I

Re: [GRASS-user] Using Overlay

Il giorno Wed, 17 Mar 2010 07:42:39 -0400 Andrew Lewin andrew.le...@sympatico.ca ha scritto: Hi All, I would like to calculate a value of one layer within an area of another raster. For instance, I have a precipitation raster layer that I would like to calculate the median value within

[GRASS-user] Suggestions for backward modelling of a river system

Hi all Can anyone suggest a method to backward model a river system's flow path that can integrate with srtm data? I am seeking a way (if possible ) to look back in time at the paleo-course of a river system. I have no doubt that a solution would be a complex undertaking - could anyone

[GRASS-user] Suggestions for backward modelling of a river system

Hi all Can anyone suggest a method to backward model a river system's flow path that can integrate with srtm data? I am seeking a way (if possible ) to look back in time at the paleo-course of a river system. I have no doubt that a solution would be a complex undertaking - could anyone

Re: [GRASS-user] Environment variables for Mac OSX

Environment variables on OSX work just like on Linux. If you need to know what a GRASS env var should be, run GRASS and check it there. But GISRC is tricky because it's temporary updated copy of ~/.grassrc6. It sounds like you are writing scripts to run outside of a GRASS session. There has

Re: [GRASS-user] Suggestions for backward modelling of a river system

Hi, that mean, as I understand, that you have to have a paleo DEM. You have to ask the question: On what data basis do I want to reconstruct paleo landscape? Geomorphological changes cannot be reconstructed just with a present day DEM. Achim On 17.03.2010 14:21, Marc Stonestreet wrote:

Re: [GRASS-user] Suggestions for backward modelling of a river system

One can't turn back time, still I also have been thinking about playing with erosion models in backwards mode. If it's possible to calculate current erosion rate and eroded material ammount, it should be possible to add erroded material to DEM, repeat erosion model run on new DEM and in such way

Re: [GRASS-user] Suggestions for backward modelling of a river system

That erosion processes are highly non-linear. Running physical based erosion models in backwards-mode is not possible I would bet. I guess one have to work with ground layers, geological land rising and lowering, climatic changes and so on. But well-wrought concept ideas are always welcome.

Re: [GRASS-user] Suggestions for backward modelling of a river system

By the way: it depends on the detail! Pre glacial reconstruction of watersheds from isostatical land-level-changes (ger. Ausgleichsbewegungen) were done for noth america. I think it was last year. Regards, Achim On 17.03.2010 22:52, Achim Kisseler wrote: That erosion processes are highly

[GRASS-user] sum one raster map conditional on another raster map

I would like to sum all of the positive values of one raster map (NDVI) based on a raster containing many watersheds that have values 1-22. Is there a way to do this in GRASS? Or a way to export this information to R and get the same results. I hope this is clear enough. thanks, -- Stephen

[GRASS-user] Problems with Windows VISTA

Hi all, I am trying to use GRASS in Windows VISTA and I have some problems. I get to open but after select Location and mapsets and push ENTER GRASS y get Error in startup script y dentro cant read pjr(units): no such variable while executin set mapunitis Somebody knows what could i do?