Re: [GRASS-user] calculation valley floor width in GRASS or some index indicating valley floor width?
SBL wrote > Hei Helumt, > > In that case I would probably try r.param.scale in order to identify flat > areas at maybe different scale levels. > > V-valleys have a higher variation in aspect at the bottom (sides are > almost facing each other and nearly "meet" at the lowest point in a > V-valley). While sides are more or less steep. So slope and aspect at a > coarser level (also available through r.param.scale) could help to > distinguish V- and U-valleys. > > Depending on scale U-Valleys have a TPI of ~0 at the bottom and ~0 at the > middle of the sides (equaly much terrain above and below a focal cell in > the given neighborhood). > > Some background material on TPI can be found here: > http://www.jennessent.com/arcview/tpi.htm > Jenness used ArcView. Yet TPI is a simple combination of r.neighbors and a > mapcalc. > > Good luck with your modelling. as a possible additional parameter for such a modelling, I've tried to implement a Multi-resolution Valley Bottom Flatness (MrVBF) index. http://lists.osgeo.org/pipermail/grass-commit/2014-June/031834.html Author: hellik Date: 2014-06-22 16:04:15 -0700 (Sun, 22 Jun 2014) New Revision: 60919 Added: grass-addons/grass7/raster/r.valley.bottom/ grass-addons/grass7/raster/r.valley.bottom/Makefile grass-addons/grass7/raster/r.valley.bottom/r.valley.bottom.html grass-addons/grass7/raster/r.valley.bottom/r.valley.bottom.py Log: r.valley.bottom: a script to calculate a Multi-resolution Valley Bottom Flatness (MrVBF) index testing and hints for improvement are very welcome. thanks - best regards Helmut -- View this message in context: http://osgeo-org.1560.x6.nabble.com/calculation-valley-floor-width-in-GRASS-or-some-index-indicating-valley-floor-width-tp5132402p5147233.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] r.valley.bottom: a script to calculate a Multi-resolution Valley Bottom Flatness (MrVBF) index
> by r60920 I've added a very rough version of: oh, it's a python addon script [GRASS-SVN] r60920 - grass-addons/grass7/raster/r.valley.bottom - best regards Helmut -- View this message in context: http://osgeo-org.1560.x6.nabble.com/r-valley-bottom-a-script-to-calculate-a-Multi-resolution-Valley-Bottom-Flatness-MrVBF-index-tp5147231p5147232.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] r.valley.bottom: a script to calculate a Multi-resolution Valley Bottom Flatness (MrVBF) index
hi, by r60920 I've added a very rough version of: r.valley.bottom: a script to calculate a Multi-resolution Valley Bottom Flatness (MrVBF) index inspired by John C. Gallant and Trevor I. Dowling 2003. A multiresolution index of valley bottom flatness for mapping depositional areas. WATER RESOURCES RESEARCH, VOL. 39, NO. 12, 1347, doi:10.1029/2002WR001426, 2003 testing and hints for improvements are very welcome ... - best regards Helmut -- View this message in context: http://osgeo-org.1560.x6.nabble.com/r-valley-bottom-a-script-to-calculate-a-Multi-resolution-Valley-Bottom-Flatness-MrVBF-index-tp5147231.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS GIS 6.4.4RC1 released
Hi Martin, On Sun, 22. Jun 2014 at 21:57:50 +0200, Martin Landa wrote: > try to ask maintainer of GEOS package in OSGeo4W framework... GEOS is built with MSVC on OSGeo4W. Jürgen -- Jürgen E. Fischer norBIT GmbH Tel. +49-4931-918175-31 Dipl.-Inf. (FH) Rheinstraße 13Fax. +49-4931-918175-50 Software Engineer D-26506 Norden http://www.norbit.de QGIS PSC member (RM) Germany IRC: jef on FreeNode -- norBIT Gesellschaft fuer Unternehmensberatung und Informationssysteme mbH Rheinstrasse 13, 26506 Norden GF: Jelto Buurman, HR: Amtsgericht Emden, HRB 5502 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS GIS 6.4.4RC1 released
Hi, 2014-06-22 20:42 GMT+02:00 Benjamin Ducke : > Has anyone had any luck getting GEOS to compile on > Windows using MinGW, so that it passes its own > validity tests? I am wondering if I am just using > an unsuitable version of GCC on Windows, but I cannot > seem to get all tests to compile cleanly. try to ask maintainer of GEOS package in OSGeo4W framework... Martin -- Martin Landa * http://geo.fsv.cvut.cz/gwiki/Landa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS GIS 6.4.4RC1 released
Hi All,
Has anyone had any luck getting GEOS to compile on
Windows using MinGW, so that it passes its own
validity tests? I am wondering if I am just using
an unsuitable version of GCC on Windows, but I cannot
seem to get all tests to compile cleanly.
Alternatively: Is anyone here in the know which tests
have to be passed so that GEOS will work reliable for
use by v.buffer?
Thanks and best,
Ben
On 18/06/14 20:15, Markus Neteler wrote:
> After months of development a first release candidate of GRASS GIS
> 6.4.4 is now available.
>
> Source code download:
> http://grass.osgeo.org/grass64/source/
> http://grass.osgeo.org/grass64/source/grass-6.4.4RC1.tar.gz
>
> Binaries download:
> http://grass.osgeo.org/download/software/#g64x
>
> To get the GRASS GIS 6.4.4RC1 source code directly from SVN:
> svn checkout
> http://svn.osgeo.org/grass/grass/tags/release_20140614_grass_6_4_4RC1
>
> Key improvements:
> Key improvements of this release include a complete rewrite of the
> r.li suite, major fixes for buffers (v.buffer, now based on GEOS
> library), major speedup for some vector modules (v.rast.stats and
> v.in.gpsbabel), various fixes for the wxPython based portable
> graphical interface (wxNVIZ, Location Wizard or Cartographic
> Composer), enabled Cairo dependency for MS-Windows, and more message
> translations.
>
> See also our detailed announcement:
> http://trac.osgeo.org/grass/wiki/Release/6.4.4RC1-News
>
> First time users should explore the first steps tutorial after installation:
> http://grasswiki.osgeo.org/wiki/Quick_wxGUI_tutorial
>
> Release candidate management at
> http://trac.osgeo.org/grass/wiki/Grass6Planning
>
> Please join us in testing this release candidate for the final release.
>
> Consider to donate pizza or beer for the next GRASS GIS Community Sprint:
> http://grass.osgeo.org/donations/
>
> Thanks to all contributors!
>
> GRASS Development Team
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--
Dr. Benjamin Ducke, M.A.
{*} Geospatial Consultant
{*} GIS Developer
bendu...@fastmail.fm
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