Comments for Scratching Surfaces

Comment on Watershed Analysis with GRASS by Micha Silver

Micha Silver — Tue, 21 May 2013 11:45:59 +0000

Tom :
Hi Micha,

I’ll try be more specific. The error generally reads “No such file or directory” at the line which references the text file of X Y co-ordinates. I have tried with many different file paths and extensions in the script. Also with a dummy set of co-ordinates to test. All with no success.

Thanks,
Tom

And you say that when you run the commands one by one, everything goes as expected? In that case it's probably some syntax error, or so. Would you care to share the script somewhere so we can have a look, and (maybe) make some suggestions? -- Micha

Comment on Watershed Analysis with GRASS by Tom

Tom — Mon, 20 May 2013 15:19:32 +0000

Hi Micha,

I’ll try be more specific. The error generally reads “No such file or directory” at the line which references the text file of X Y co-ordinates. I have tried with many different file paths and extensions in the script. Also with a dummy set of co-ordinates to test. All with no success.

Thanks,
Tom

Comment on Watershed Analysis with GRASS by Micha Silver

Micha Silver — Sat, 18 May 2013 17:38:14 +0000

Hi Tom:
Can you be more specific? What works, and what error appears? at what stage?

Comment on Watershed Analysis with GRASS by Tom

Tom — Thu, 16 May 2013 18:17:05 +0000

Hi,
I am having some trouble with different parts of the script. I often get an error saying that a file cannot be found or created in the mapset or other. I am trying to run a .sh script in the GRASS command window through a virtual ubunto operation system. The commands work when typed into the command window.
Thanks,
Tom

Comment on GIS Tutorial with QGIS by Micha Silver

Micha Silver — Wed, 10 Apr 2013 16:54:05 +0000

THose extra parameters are all optional. The r.watershed module works fine without filled depressions. The other two are useful only if you are going to use the results in the USLE modules afterwards.
Best,
Micha

Comment on GIS Tutorial with QGIS by Al

Al — Wed, 10 Apr 2013 14:21:16 +0000

Hi Micha,
Thanks for the GIS Tutorials. I tried to go through Ex. 9: Using GRASS – Watershed delineation, using r.watershed inside SEXTANTE-QGIS. But I could not go on. The function requires many input parameters, such as ‘Locations of real depressions’, ‘Amount of overland flow per cell’, ‘Percent of disturbed land for USLE’, etc. These are not mentioned in your tutorial. What shall I put in these blanks? Thanks for the help.
Al

Comment on Spatialite on Ubuntu by Winston Smith

Winston Smith — Fri, 15 Feb 2013 14:15:02 +0000

Hey Micha, you’re welcome. I actually DID install QGIS (but I compiled the latest version from source and specified spatialite to be libspatialite-4.0.0 and not to use internal spatialite) and so far it works with 4.0. See this thread for some background information how to do it: I might post a blog article about it somewhere in the future: https://groups.google.com/forum/?fromgroups=#!topic/spatialite-users/vSCXOm9DNOY

Comment on Spatialite on Ubuntu by Micha Silver

Micha Silver — Sat, 09 Feb 2013 18:48:50 +0000

Thanks, Winston
I’m holding off for a while with spatialite 4.0 until QGIS catches up. As you know, databases created with 4.0 cannot be opened with earlier versions. And it seems that the built in spatialite provider in QGIS is still based on 3.0, so if you use the newer spatialite to create and populate a database, it will not be usable in QGIS.

Comment on Spatialite on Ubuntu by Winston Smith

Winston Smith — Sat, 09 Feb 2013 10:18:26 +0000

Hey, I posted an updated howto for SpatiaLite 4.0.0 and the GUI 1.6.0

http://www.wnstnsmth.net/blog/2013/02/how-to-install-spatialite-and-spatialitegui-on-ubuntu

Comment on Grids and Graticules in QGIS by S.V.Hegde

S.V.Hegde — Wed, 02 Jan 2013 12:33:05 +0000

The post is old and so is the problem but without solution.
I think you have missed the point. If I project in Lat/Long I will surely be able to put grid with Lat/Long grid labels. But if I project it in UTM the grid label will be in meters. I want UTM projection, grid labels in degree, minutes, seconds and also I want scale bar in the from say 1cm = 1 km etc. I need this for some of my applications. This is possible in GRASS GIS, Arc GIS but I dont think possible in QGIS.