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Dec
26
answered How can I calculate flow length in QGiS/GRASS?
Dec
13
comment grass r.watershed to larger rivers parallel lines to same stretch
Why fillnulls? What is the source of the DEM?
Dec
12
comment grass r.watershed to larger rivers parallel lines to same stretch
I think you need to start by checking the elevation raster that you used for input to r.watershed
Nov
28
answered How to calculate the distance to the nearest water source?
Nov
28
answered Regarding Atmospheric correction and Elevation DEM Projection system
Nov
26
comment Resetting 'cat' column in GRASS?
Just make a new grid layer of however many rows and columns you want with v.mkgrid.
Nov
26
answered Resetting 'cat' column in GRASS?
Nov
18
comment G_Malloc error for Grass module(r.stream.extract) in R
Your threshold value looks VERY low to me. with 8000X10000 pixels, you have over 80 million cells. With a threshold of 6 you will be trying to create more than 10 million tiny drainage areas and stream reaches.
Nov
9
comment Unable to install ECW support on lubuntu 14.04
Thanks, AndreJ: Helped me with QGIS 2.12 running on Mint 17.2
Nov
5
comment How to determine aerosol model value for i.atcorr in GRASS? (Using Aeronet data)
The usual practice is, as you suggested, to interpolate between the two values for the two available wavelengths (and for the two entries closest in time to your landsat time)
Sep
8
comment export several rasters from grass
The previous post refers to a bash shell. You will have to write the equivalent commands for windows cmd. Maybe this post: stackoverflow.com/questions/2591758/batch-script-loop will give you some ideas
Sep
5
answered Qgis 2.10 unable to add a new feature in spatialite via sql function “GeomFromText”
Sep
4
comment from two tables make a new one
Can you post the outputs of the first two queries in the answer above? (just to be sure what CRS yuor data are in)?
Sep
2
answered from two tables make a new one
Aug
25
comment Why does Spatialite layer prompt for CRS if SRID was not explicitly defined in Layer Options?
I think you have indeed hit on a bug. When you export a layer to Spatialite it gets SRID=0 (the default), instead of the correct SRID of the layer. Then QGIS, seeing no CRS in the Metadata, prompts each time. I suggest you report this problem to QGIS developers.
Aug
25
comment export several rasters from grass
The answer in the post that you mentioned definitely works. It is intended to be run in a bash shell. Yu can do a similar loop in python if you prefer. Can you show what you did that doesn't work?
Aug
25
comment how to register view geometry made by MakeLine function?
Is there any reason not to just make a real table of line features?
Aug
24
comment how to register view geometry made by MakeLine function?
AFAIK you can't. A view can only refer to a real geometry column in the spatial table it is based on.
Aug
22
comment find pairs of near features with geopandas, fiona, gdal etc
I'm sure that one of these previous posts will help: (gis.stackexchange.com/questions/67793/…) or (gis.stackexchange.com/questions/155725/…)
Aug
12
answered Grass GIS: ArcGIS' “Raster to polygon” equivalent