[GRASS-user] GitHub Discussions is enabled

Dear all, GitHub Discussions is enabled (https://github.com/OSGeo/grass/discussions/1841) -- obviously and clearly _not_ replacing the mailing lists. Warm regards, Nikos ps- Thanks Vaclav for time and efforts put in to this ___ grass-user mailing

Re: [GRASS-user] GRASS GIS Birthday Virtual Celebration

joining this video call. ___ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user -- Nikos Alexandris | Remote Sensing & Geomatics GPG Key Fingerprint 6F9D4506F3CA28380974D31A9053534B693C

Re: [GRASS-user] Failure to compile GRASS GIS 7.8 with Proj 6 and GDAL 3

* Nikos Alexandris [2020-02-04 16:51:33 +0100]: regarding PROJ, cleaning up ${prefix}/share with the proj.db and grids is quite important because PROJ is evolving fast and any leftovers from a previous installation might confuse software compiled against PROJ. That I forgot to remove :D

Re: [GRASS-user] Failure to compile GRASS GIS 7.8 with Proj 6 and GDAL 3

* Markus Metz [2020-02-03 22:35:26 +0100]: Hi Nikos, On Mon, Feb 3, 2020 at 7:28 PM Nikos Alexandris wrote: >>I got it working, more or less. Recompiling only PROJ did away most of >>the errors but a few. I guess I need to recompile PROJ (+GEOS), then >>GDAL, then the r

Re: [GRASS-user] Failure to compile GRASS GIS 7.8 with Proj 6 and GDAL 3

* Nikos Alexandris [2020-02-03 18:15:31 +0100]: * Nikos Alexandris [2020-02-02 10:40:11 +0100]: Markus Metz: Hi Nikos, PROJ is moving fast, please use the latest PROJ 6 release 6.3.0 On Sat, Feb 1, 2020 at 8:36 PM Nikos Alexandris wrote: Dears, I cannot get GRASS GIS 7.8 to compile

Re: [GRASS-user] Failure to compile GRASS GIS 7.8 with Proj 6 and GDAL 3

* Markus Neteler [2020-02-02 10:43:51 +0100]: Hi Nikos, On Sun, Feb 2, 2020 at 10:40 AM Nikos Alexandris wrote: ... I got it working, more or less. Recompiling only PROJ did away most of the errors but a few. I guess I need to recompile PROJ (+GEOS), then GDAL, then the rest. Would you

Re: [GRASS-user] Failure to compile GRASS GIS 7.8 with Proj 6 and GDAL 3

* Nikos Alexandris [2020-02-02 10:40:11 +0100]: Markus Metz: Hi Nikos, PROJ is moving fast, please use the latest PROJ 6 release 6.3.0 On Sat, Feb 1, 2020 at 8:36 PM Nikos Alexandris wrote: Dears, I cannot get GRASS GIS 7.8 to compile with proj Rel. 6.0.0, March 1st, 2019 if possible

Re: [GRASS-user] Failure to compile GRASS GIS 7.8 with Proj 6 and GDAL 3

Markus Metz: Hi Nikos, PROJ is moving fast, please use the latest PROJ 6 release 6.3.0 On Sat, Feb 1, 2020 at 8:36 PM Nikos Alexandris wrote: Dears, I cannot get GRASS GIS 7.8 to compile with proj Rel. 6.0.0, March 1st, 2019 if possible, never use a x.0.0 release of any software

[GRASS-user] Failure to compile GRASS GIS 7.8 with Proj 6 and GDAL 3

Dears, I cannot get GRASS GIS 7.8 to compile with ``` eselect gcc show x86_64-pc-linux-gnu-9.2.0 ``` + ``` make --version GNU Make 4.2.1 ``` + zlib version 1.2.11-r3 + ``` eselect python show python3.7 ``` + ``` flex --version flex 2.6.4 ``` + ``` proj Rel. 6.0.0, March 1st, 2019 ``` + ```

Re: [GRASS-user] GRASS GIS issues now on GitHub!

l soon create a template to better follow the different issue types (bug or enhancement), topics/tags, operating systems, GRASS GIS versions, etc. ___ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-use

[GRASS-user] Do not report cells where thousands of maps have no data

GRASS GIS' `r.stats` modules does this: ``` r.stats input=$(g.list rast pattern=cru*.*1 separator=comma) -n -x -N ``` However, it won't do it for thousands of maps. Too many maps will hit the '[Argument list too long]' error which is triggered by the ARG_MAX constant. Is there a work-around?

Re: [GRASS-user] tiling and 'cliping' DEMs

* Helmut Kudrnovsky [2019-09-10 20:12:09 -0700]: Rich Shepard wrote I am downloading and importing 1m LiDAR DEMs for a 667 mi^2 (1727.5 km^2) drainage basin. These are all in 7.5' topographic quad sections. The files take up a lot of disk space and memory when working with them. I assume

Re: [GRASS-user] licensing question: calling GRASS GIS modules via the grass.script API in an MIT/Apache licensed script ?

___ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user -- Nikos Alexandris | Remote Sensing & Geomatics GPG Key Fingerprint 6F9D4506F3CA28380974D31A9053534B693C4FB3 ___ g

Re: [GRASS-user] question on Stray light Landsat 8 data

* Gabriel Cotlier [2018-08-21 12:00:24 -0300]: I would like to ask if nonetheless the effect due to "stray light" the *i.landsat8.swlst* code for split window is still applicable to Landsat 8 data and whether these error is specially visible on water bodies? The implemented algorithm (Du,

Re: [GRASS-user] turning sqlite journal off

* Markus Metz [2019-05-15 22:55:13 +0200]: On Tue, May 14, 2019 at 11:12 AM Panagiotis Mavrogiorgos wrote: Hi Laura, This thread seems to be related: http://osgeo-org.1560.x6.nabble.com/SQLITE-db-locking-problem-td5182180.html I also had a somewhat similar problem that was related to the

Re: [GRASS-user] [GRASS-dev] Nice opportunity to show off GRASS functionality and topological vector format ?

* Nikos Alexandris [2019-04-19 13:46:18 +0200]: * Markus Metz [2019-04-18 18:38:28 +0200]: On Tue, Apr 16, 2019 at 11:07 AM Moritz Lennert < mlenn...@club.worldonline.be> wrote: Hi, If anyone has some time and wants to show off some GRASS GIS power: https://www.ecmwf.int/en/le

Re: [GRASS-user] Nice opportunity to show off GRASS functionality and topological vector format ?

tinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user -- Nikos Alexandris | Remote Sensing & Geomatics GPG Key Fingerprint 6F9D4506F3CA28380974D31A9053534B693C4FB3 ___

Re: [GRASS-user] raster pixel value

* Nikos Alexandris [2019-03-14 17:57:16 +0100]: * Markus Metz [2019-03-14 17:07:49 +0100]: On Thu, Mar 14, 2019 at 3:16 PM Nikos Alexandris wrote: Following up, why are there differences between GDAL and GRASS GIS in the following example? This ftp://ftp.soilgrids.org/data/aggregated

Re: [GRASS-user] raster pixel value

* Markus Metz [2019-03-15 22:16:17 +0100]: On Thu, Mar 14, 2019 at 11:31 PM Nikos Alexandris wrote: Markus Metz: >>With r.stats -x, indexing starts with 1 (first row is 1). >>With gdallocationinfo, indexing starts with 0 (first row is 0). I wonder if `-0` flag would make sens

Re: [GRASS-user] raster pixel value

Markus Metz: With r.stats -x, indexing starts with 1 (first row is 1). With gdallocationinfo, indexing starts with 0 (first row is 0). I wonder if `-0` flag would make sense to be GDAL-compliant. I created a Pull Request (in `grass-ci`) for a minor update in the manual. Nikos

Re: [GRASS-user] raster pixel value

Francois Chartier: I am asking a question on the fundamentals not on a particular example on how the value within a raster cell is determined when multiple vector data points are located within a raster cell footprint. I use RST mostly and sometimes IDW for vector data points. Nikos

Re: [GRASS-user] raster pixel value

* Markus Metz [2019-03-14 17:07:49 +0100]: On Thu, Mar 14, 2019 at 3:16 PM Nikos Alexandris wrote: Following up, why are there differences between GDAL and GRASS GIS in the following example? This ftp://ftp.soilgrids.org/data/aggregated/5km/OCDENS_M_sl1_5km_ll.tif raster map, subject

Re: [GRASS-user] raster pixel value

* Nikos Alexandris [2019-03-14 15:11:51 +0100]: Following up, why are there differences between GDAL and GRASS GIS in the following example? This ftp://ftp.soilgrids.org/data/aggregated/5km/OCDENS_M_sl1_5km_ll.tif raster map, subject to `gdalinfo`: ``` gdalinfo OCDENS_M_sl1_5km_ll.tif -nogcp

Re: [GRASS-user] raster pixel value

Following up, why are there differences between GDAL and GRASS GIS in the following example? This ftp://ftp.soilgrids.org/data/aggregated/5km/OCDENS_M_sl1_5km_ll.tif raster map, subject to `gdalinfo`: ``` gdalinfo OCDENS_M_sl1_5km_ll.tif -nogcp -nomd -norat -noct -nofl Driver: GTiff/GeoTIFF

Re: [GRASS-user] raster pixel value

* Francois Chartier [2019-03-10 10:56:40 -0400]: I am asking a question on the fundamentals not on a particular example on how the value within a raster cell is determined when multiple vector data points are located within a raster cell footprint. I use RST mostly and sometimes IDW for vector

Re: [GRASS-user] raster pixel value

* Francois Chartier [2019-03-10 09:38:13 -0400]: Hi i was wondering how the value of a pixel is determined when multiple data points are located within a pixel, for 2d and 3d pixel. I assume it is based on the interpolation methodology of the raster. is this correct. for large pixels where

Re: [GRASS-user] r.width.funct in correct version

* Juan Lopez [2019-02-20 06:20:48 -0400]: I have found a discussion about r.width.funct in this list, but I am not sure about the meaning of the final comment in order to solve the problem. Discussion is in this link https://www.mail-archive.com/grass-user@lists.osgeo.org/msg37141.html

Re: [GRASS-user] Flood Forecasting Tool

Mehrdad Varedi wrote: Hello dear Grassians! I want to forecast flood around a river. I would like to know what is the best tool in GRASS or applications based on GRASS to do this. http://www.itzi.org/ is built on top of GRASS GIS. No idea if "around a river" is out the tool's scope. It is

Re: [GRASS-user] High tension with r.resamp.rst

* Ghislain Vieilledent | CIRAD [2019-02-06 14:11:04 +0100]: Dear GRASS GIS user, I am using r.resamp.rst to interpolate climatic data at 30sec resolution over Africa. Grass script, data, and results are available here: https://nextcloud.fraisedesbois.net/index.php/s/CKzsZCSCqMTY9rq

Re: [GRASS-user] Upscaling an elevation model

* Helmut Kudrnovsky [2019-02-02 08:17:03 -0700]: NikosAlexandris wrote Dear "elevation" experts, I am looking for ways to upscale a 5m resolution elevation model. The upscaled models will be subjected to a series of trials using `r.watershed`. Derivative products will be inputs for soil

Re: [GRASS-user] How to generate a vector graphics file from GRASS CLI?

* Ken Mankoff [2019-02-02 13:51:43 +0100]: On 2019-02-02 at 11:51 +0100, Ken Mankoff wrote... One more ps.map question. What is the best/easiest method to patch together multiple rasters with different colors? From https://grasswiki.osgeo.org/wiki/Ps.map_scripts """If you want to show

[GRASS-user] Upscaling an elevation model

Dear "elevation" experts, I am looking for ways to upscale a 5m resolution elevation model. The upscaled models will be subjected to a series of trials using `r.watershed`. Derivative products will be inputs for soil erosion modelling. In our wiki page about Interpolation [0],

Re: [GRASS-user] How to generate a vector graphics file from GRASS CLI?

* Ken Mankoff [2019-01-29 08:43:56 +0100]: Hi, I'm trying to generate a vector graphics file (PDF, but EPS or PS is fine) from the GRASS CLI. I'd like to have both raster and vector output. When I follow the simple examples from PSDRIVER or CAIRO the result is always the same - only the

Re: [GRASS-user] Overlapping pixels among DEM tiles to compute the LS factor for RUSLE

* Nikos Alexandris [2019-01-26 00:13:38 +0100]: * Ken Mankoff [2019-01-25 11:50:29 -0800]: Hi Nikos, On 2019-01-25 at 07:18 -0800, Nikos Alexandris wrote... A billion-pixel scaled DEM is the main input to compute the slope length and steepness (LS) factor for RUSLE (`r.watershed`), only

Re: [GRASS-user] Overlapping pixels among DEM tiles to compute the LS factor for RUSLE

* Ken Mankoff [2019-01-25 11:50:29 -0800]: Hi Nikos, On 2019-01-25 at 07:18 -0800, Nikos Alexandris wrote... A billion-pixel scaled DEM is the main input to compute the slope length and steepness (LS) factor for RUSLE (`r.watershed`), only. Tiling this DEM in tiles of 5K^2 pixels (`r.tile

[GRASS-user] Overlapping pixels among DEM tiles to compute the LS factor for RUSLE

A billion-pixel scaled DEM is the main input to compute the slope length and steepness (LS) factor for RUSLE (`r.watershed`), only. Tiling this DEM in tiles of 5K^2 pixels (`r.tile`), appears to be a reasonable approach to parallelise this process. I have no idea if an overlap among the

[GRASS-user] r.estimap.recreation add-on licensed by the European Commission

Dear community, I am contented to announce the decision by the European Commission [0] to release the GRASS GIS add-on `r.estimap.recreation` [1] as Open Source Software under the European Union Public Licence (EUPL). [0]

Re: [GRASS-user] Semi-automatic classification of old thematic map

* Giuseppe Cillis [2018-11-06 11:23:56 +0100]: Dear all, I would like to classify in a semi-automatic way, an old scanned thematic map of land use. The different classes of land use are represented by polygons of different colors. Which module can I use to identify the different land use

Re: [GRASS-user] zonal statistics for multiple areas

* Alessandro Sebastiani [2018-10-29 21:32:51 +0100]: thank you all for your suggestions. Dear Nikos, I have some 0-1 rasters that represents presence-absence of different land covers. Each raster's resolution is 10x10m, thus i want to compute the sum in order to obtain the surface covered by

Re: [GRASS-user] zonal statistics for multiple areas

Resending, as I forgot to Cc the list. * Alessandro Sebastiani [2018-10-29 16:05:54 +0100]: Hello to everybody,o Hello Alessandro, I hope my question is appropriate for this mail list. I have created 5 different buffer layers (d=100,200,300,400,500 m) from a point vector. Now i want to

Re: [GRASS-user] How to get the area of a polygon in a layer

* Markus Neteler [2018-10-26 22:34:45 +0200]: Hi Nikos, On Tue, Oct 23, 2018 at 5:32 PM Nikos Alexandris wrote: Dear list, is the https://grass.osgeo.org/uploads/grass/sampledata/firedemo_grass7.sh script available. This link is broken. the correct link is: https://grass.osgeo.org

Re: [GRASS-user] d.rast in python script

* Frank David [2018-10-24 12:04:43 +0200]: Le 24/10/2018 à 11:58, Nikos Alexandris a écrit : * Frank David [2018-10-24 11:35:07 +0200]: Stephan, The G_OPT_OUTPUT option generate well the check box "add tree layer" in my script GUI. My problem, now is how to add the raster ou

Re: [GRASS-user] d.rast in python script

* Frank David [2018-10-24 11:35:07 +0200]: Stephan, The G_OPT_OUTPUT option generate well the check box "add tree layer" in my script GUI. My problem, now is how to add the raster output while I want to set his name by the script ? I succeed with g.copy my_raster_name to

Re: [GRASS-user] d.rast in python script

* Frank David [2018-10-23 22:06:01 +0200]: Thank you everybody for your help. Do you know why a run_command("d.rast"... in a python script is not enough to display a raster ? I don't understand why this command is so different. Display a raster map where? Nikos signature.asc Description:

Re: [GRASS-user] How to get the area of a polygon in a layer

Dear list, is the https://grass.osgeo.org/uploads/grass/sampledata/firedemo_grass7.sh script available. This link is broken. Thank you, Nikos signature.asc Description: PGP signature ___ grass-user mailing list grass-user@lists.osgeo.org

Re: [GRASS-user] d.rast in python script

* Laurent C. [2018-10-20 22:06:38 +0100]: Hello Frank, It is not very straightforward, but it is possible. Here is an example on how I do it: import os import grass.script as gscript from grass.pygrass.gis.region import Region # Set general env os.environ['GRASS_RENDER_IMMEDIATE'] = "cairo"

Re: [GRASS-user] d.rast in python script

* Stefan Blumentrath [2018-10-22 08:20:05 +]: I think Laurents solution is for rendering maps to file/image. If of interest, see also: https://lists.osgeo.org/pipermail/grass-user/2018-October/079436.html Nikos signature.asc Description: PGP signature

[GRASS-user] tygrass, working with GRASS GIS under Terminology

Maybe of your interest, an approach on rendering maps directly in the Terminology terminal while working interactively or even while running a script: https://gitlab.com/NikosAlexandris/tygrass an experimental addon: https://gitlab.com/NikosAlexandris/d.tyraster a series of screencasts:

Re: [GRASS-user] How to get the area of a polygon in a layer

Kalindu Perera: Commands are as follows *r.ros,* r.ros --overwrite model=fuel_model@demomapset moisture_1h=1hour_moisture@demomapset moisture_live=live_moisture@demomapset velocity=wind_speed@demomapset direction=wind_direction@demomapset slope=slope@demomapset aspect=aspect@demomapset

Re: [GRASS-user] How to get the area of a polygon in a layer

wledge Best Regards Kalindu Perera On Mon, 15 Oct 2018 at 15:07, Nikos Alexandris wrote: * Kalindu Perera [2018-10-15 13:28:15 +0530]: >Dear all, > >We are doing wildfire simulation in Grass GIS. We need to compare the area >of 2 wildfire spreads after wildfire simulation ran.

Re: [GRASS-user] How to get the area of a polygon in a layer

* Kalindu Perera [2018-10-15 13:28:15 +0530]: Dear all, We are doing wildfire simulation in Grass GIS. We need to compare the area of 2 wildfire spreads after wildfire simulation ran. We tried to calculate the area of the spread using r.surf.area module. But we couldn't identify which is the

Re: [GRASS-user] r.category

* Frank David [2018-10-12 16:31:06 +0200]: Ha yes ! a small part of the legend is displayed on the bottom of my map (I did not take care). I had probably activate d.legend by the past to test it. But I don't know how to remove it ? Right click on it, then "Remove legend". Nikos

Re: [GRASS-user] EPSG 32633 and spatial resolution for hourly LST product from Copernicus

(For context see previous messages in this thread) Nikos A: >> g.region raster=g2_BIOPAR_LST_201606220100_GLOBE_GEO_V1.2.nc_LST >> -pag w=-180 e=180 Markus M: >this shifts the grid by half a cell to the east. The -a flag does >not mak sense because 1) you want to force new extends, 2)

Re: [GRASS-user] EPSG 32633 and spatial resolution for hourly LST product from Copernicus

Nikos wrote: >> Import using r.in.gdal, _without_ any of `-l` or `-a` and then I get the >> closest to the reported spatial resolution. Else, with `-a`, for >> example, the spatial resolution is not as close to the "original" one. >> Makes sense? Markus M: >what would be the output

Re: [GRASS-user] EPSG 32633 and spatial resolution for hourly LST product from Copernicus

Nikos wrote: gdalinfo NETCDF:"g2_BIOPAR_LST_201606220100_GLOBE_GEO_V1.2.nc":LST Driver: netCDF/Network Common Data Format Files: g2_BIOPAR_LST_201606220100_GLOBE_GEO_V1.2.nc Size is 8064, 3584 Coordinate System is: GEOGCS["unknown", DATUM["unknown",

Re: [GRASS-user] EPSG 32633 and spatial resolution for hourly LST product from Copernicus

* Veronica Andreo [2018-09-25 08:24:44 -0300]: AFAIU, plate carree (lat long grid, no meters) is deprecated, and you should use latlong instead. I had a similar issue with modis ocean color products. Do you at least get the same number of row and columns that is described by gdalinfo when you

[GRASS-user] EPSG 32633 and spatial resolution for hourly LST product from Copernicus

The hourly 5km LST product from Copernicus, as per the product user manual (https://land.copernicus.eu/global/sites/cgls.vito.be/files/products/GIOGL1_PUM_LST-I1.40.pdf) "is displayed in a regular latitude/longitude grid (plate carrée) with the ellipsoid WGS 1984 (Terrestrial radius=6378km).

Re: [GRASS-user] Get map from https://lst.mundialis.de in GRASS GIS' data base

* Markus Neteler [2018-09-24 17:04:13 +0200]: On Mon, Sep 24, 2018 at 5:00 PM Markus Neteler wrote: On Fri, Sep 21, 2018 at 5:31 PM Nikos Alexandris > Dears, > > can I get a fraction (spatial and temporal) of the maps shown under > https://lst.mundialis.de/, directly in GRASS GI

[GRASS-user] i.modis and missing support for HFD4 under Gentoo/Funtoo-Linux

Dears, I am trying to use `i.modis.download`. There is this message "GDAL installation has no support for HDF4, please update GDAL" that won't let the module run at all. Strangely, there is no 'hdf' use flag (Gentoo/Funtoo terminology) for gdal (anymore?). Any Gentoo users? Thank you, Nikos

Re: [GRASS-user] Versions question [ANSWERED]

* Rich Shepard [2018-09-22 10:30:35 -0700]: On Sat, 22 Sep 2018, Hernán De Angelis wrote: In my system the executables for the different grass versions look like this: grass74 grass75 grass77 Hernán, A while ago I copied /usr/local/bin/grass75 to /usr/local/bin/grass and used only

[GRASS-user] Get map from https://lst.mundialis.de in GRASS GIS' data base

Dears, can I get a fraction (spatial and temporal) of the maps shown under https://lst.mundialis.de/, directly in GRASS GIS? Thank you, Nikos signature.asc Description: PGP signature ___ grass-user mailing list grass-user@lists.osgeo.org

[GRASS-user] Raster based approach to compute Extent/Sum for categorical maps

Dears, some background: I am exploring GRASS GIS' capabilities to run an algorithm I built, by exclusively using raster maps and `r.*` modules. Alternatives (i.e. Python based solutions) excluded. Algorithm 1 B ← {0, .., m-1} 2 T ← {0, .., n-1} 3 W ← 0 4 R ← 0 5 F ← 0 6 MASK ← HQR

Re: [GRASS-user] Historic book

* Rich Shepard [2018-08-29 13:56:31 -0700]: On Wed, 29 Aug 2018, Markus Metz wrote: I would be interested in it, and I would like to have it somewhere in the GRASS archives. Those old manuals are a source of information that should not be underestimated. Markus M, The file is 20.7Mb so I

Re: [GRASS-user] New CLI option --tmp-location in 7.5 to enhance --exec

Vaclav Petras [2018-08-14 23:20:16 -0400]: * Get SRS/CRS for a file: grass --tmp-location ~/data/elevation.tiff --exec g.proj -p Nikos: Perhaps test if the file exists and, if not, exit with an informative error message? In Python: import os.path os.path.isfile(fname) ? Hi Nikos,

Re: [GRASS-user] r.clip ... not clipping

* Helmut Kudrnovsky [2018-08-17 00:18:01 -0700]: Rich Shepard wrote On Wed, 15 Aug 2018, Vaclav Petras wrote: See r.clip module in addons for equivalent of v.clip: https://grass.osgeo.org/grass74/manuals/addons/r.clip.html Vaclav, r.clip is not working for me. I have a 13G DEM that I

Re: [GRASS-user] New CLI option --tmp-location in 7.5 to enhance --exec

* Vaclav Petras [2018-08-14 23:20:16 -0400]: .. If you are interested, please, test this new functionality. It is an opportunity to provide feedback before this feature lands in the 7.6 release. Here are some things to try: * Execute a module in a location created based on EPSG: grass

Re: [GRASS-user] Area statistics for categorical maps

* Nikos Alexandris [2018-07-29 14:10:39 +0200]: The obvious problem is: `r.stats` if CSV friendly but gives approximations, `r.report` is not CSV friendly but the sum of relative percentages sum up to 100%. How do you report areal statistics? See also: https://trac.osgeo.org/grass/ticket/507

[GRASS-user] Area statistics for categorical maps

Recently, I "discovered" that `r.stats` and `r.report` accept multiple raster input maps. Which is fantastic! I am yet to find my "ideal" reporting method for when involving 3 (or more) raster maps. - `r.stats` reports _approximate_ percentages that refer to the complete extent of the

Re: [GRASS-user] r,in.gdal error when importing a jpeg2000 image

* Paul Shapley [2018-07-18 09:32:56 +0100]: Hi Users, Trying to import an 8.7gb (jpeg2000) image into Grass 7.4.1 64 bit. I get the error below. Tested the image in another OS GIS package and it opens without issue. Not sure why Grass wont import it. Thanks everyone! Paul Shapley If it's

Re: [GRASS-user] Importing .tif

* Helmut Kudrnovsky [2018-07-14 04:19:53 -0700]: I did that before too. Did you also note that it takes "too much" >time to create the Location using the '.tif' file? it didn't take a long time to create the location. For completion, using the same sample I used first in this thread:

Re: [GRASS-user] script option

* Frank David [2018-07-14 12:13:26 +0200]: Hi Nikos, You can find below the full interface script. The script is not yet finished. It may be helps you to understand the problem ?! I don't really understand how works the parameter guidependency and with which key I must connect it. I did not

Re: [GRASS-user] Importing .tif

* Rich Shepard [2018-07-16 08:04:59 -0700]: On Sat, 14 Jul 2018, Nikos Alexandris wrote: gdalinfo int_43120C4404.tif -proj4 -nomd Nilos/Helmut: For some reason I looked at the .xml file rather than running gdalinfo on the 100th/quad .tif file. Creating a new location with that proj.4

Re: [GRASS-user] Importing .tif

* Helmut Kudrnovsky [2018-07-14 00:59:52 -0700]: gdalinfo int_43120C4404.tif -proj4 -nomd Driver: GTiff/GeoTIFF Files: int_43120C4404.tif int_43120C4404.tif.ovr int_43120C4404.tif.aux.xml Size is 865, 1739 Coordinate System is: PROJCS["NAD_1983_CORS96_UTM_Zone_10N",

Re: [GRASS-user] Importing .tif

Rich, I downloaded a sample LDQ file: 'LDQ-43120C4.zip'. Some '.tif' files are inside the subdirectory 'Intensity'. GDAL says for one of them: ``` gdalinfo int_43120C4404.tif -proj4 -nomd Driver: GTiff/GeoTIFF Files: int_43120C4404.tif int_43120C4404.tif.ovr

Re: [GRASS-user] script option

* Frank David [2018-07-13 19:26:36 +0200]: Le 11/07/2018 à 09:31, Nikos Alexandris a écrit : * Frank David [2018-07-10 15:44:51 +0200]: Le 10/07/2018 à 12:25, Nikos Alexandris a écrit : * frank [2018-07-10 08:05:29 +0200]: Hi dear grass users, I'm trying to get two field name

Re: [GRASS-user] Start in text mode: define new location with proj.4 string

* Rich Shepard [2018-07-11 09:58:52 -0700]: On Wed, 11 Jul 2018, Nikos Alexandris wrote: Thanks. Then, the help's description deserves an update. Currently: -gtext use text based interface (show welcome screen) and set as default Nikos, Then I guess an update is due. See attached

Re: [GRASS-user] Start in text mode: define new location with proj.4 string

* Rich Shepard [2018-07-11 09:24:01 -0700]: On Wed, 11 Jul 2018, Nikos Alexandris wrote: By the way, the -gtext option is not relevant. It merely shows the welcome/logo screen when launching a GRASS GIS session, then jumps back to the command line. Nikos, Not with 7.5svn. When I use

Re: [GRASS-user] Start in text mode: define new location with proj.4 string

* Rich Shepard [2018-07-11 08:24:27 -0700]: On Wed, 11 Jul 2018, Nikos Alexandris wrote: I see. Maybe we should file an enhancement ticket, to provide this option through the command line too? Nikos, I don't know how common this is. This project is the first time I've had DEM source

Re: [GRASS-user] Start in text mode: define new location with proj.4 string

* Rich Shepard [2018-07-11 05:44:47 -0700]: On Wed, 11 Jul 2018, Nikos Alexandris wrote: The grass --help does not mention support for "Proj" strings. Only geo(-referenced)file and EPSG. Nikos, Yep. That's why I asked. So, on the infrequent occasions when source data doe

Re: [GRASS-user] question on r.out.gdal in a loop

* Nikos Alexandris [2018-07-11 09:14:47 +0200]: Gabriel Cotlier wrote: I'm using grass 7.4.1 trying to export  all raster layers in the current mapset out of grass to a folder as GeoTiff files though a for loop from the python shell  as follows and I'm getting the error in red

Re: [GRASS-user] script option

* Frank David [2018-07-10 15:44:51 +0200]: Le 10/07/2018 à 12:25, Nikos Alexandris a écrit : * frank [2018-07-10 08:05:29 +0200]: Hi dear grass users, I'm trying to get two field name of an attribute table (ctx_map) by the options of the gui. But I can access only at the first one

Re: [GRASS-user] Start in text mode: define new location with proj.4 string

* Micha Silver [2018-07-10 22:34:53 +0300]:   Reading the Startup page I do not see a way to apply the proj.4 string to create a new location on the command line. I know this is an option with the GUI location wizard but do not see the appropriate '-c' modifier to do

Re: [GRASS-user] Vector map point deleted but still displays

* Rich Shepard [2018-07-10 15:11:32 -0700]: I removed a point from a vector map but it still shows up on the display monitor (see attached screenshot, point #2). The attribute table no longer contains that row: cat|y|x|label 1|45.299844|-122.353975|USGS gauge 3|45.302761|-122.358851|Building

Re: [GRASS-user] question on r.out.gdal in a loop

Gabriel Cotlier wrote: I'm using grass 7.4.1 trying to export  all raster layers in the current mapset out of grass to a folder as GeoTiff files though a for loop from the python shell  as follows and I'm getting the error in red... What could be the problem? Thanks a lot

Re: [GRASS-user] script option

* frank [2018-07-10 08:05:29 +0200]: Hi dear grass users, I'm trying to get two field name of an attribute table (ctx_map) by the options of the gui. But I can access only at the first one and I don't find why...??. See my code below : #%option G_OPT_V_MAP #% key: ctx_map #% description:

Re: [GRASS-user] Unable to compile my module. ERROR: Variable 'LOCATION_NAME' not set

Leonida, there is nothing to be seen (at least with my client) below the "but it returns:". Is the script available to test? PM if you want. Nikos * leonidas [2018-07-06 09:32:26 -0700]: I'm trying to compile my script as grass module. I followed the instructions of this tutorial

Re: [GRASS-user] question on i.nightlights.intercalibration code

* Gabriel Cotlier [2018-07-05 18:28:30 -0300]: Dear Markus, Thanks a lot for the explanation. For some reasoner every time I try to run g.region I can's and I got this pop up dialog box as in the figure below, and apparently g.region does not run... How could be possible to solve it? Thanks a

Re: [GRASS-user] Semi-automatic classification with GRASS modules

* Michele Zurlo [2018-07-06 07:27:29 +0200]: Thank you for your answer. I will add a texture channel to run i.cluster. I recall that I naively have tried to "abuse" the module by using the same input image twice! Only a curiosity I know that i.cluster is an old way to approach to

Re: [GRASS-user] Semi-automatic classification with GRASS modules

Michele Zurlo: [..] I use this e-mail also to make a question, during a work I tried to classify a pancromatic aerial image using an unsupervised approach. Running i.cluster it gave me an error indicating that it needs more than two classes. What I missed? Dear Michele, the algorithm behind

Re: [GRASS-user] Possible Grass Bug

* Rich Shepard [2018-06-30 16:04:33 -0700]: On Sun, 1 Jul 2018, ubuntu wrote: What is the difference between the console at the layer manager tab and the GRASS 7.4.0 (nc_spm_08_grass7):~ > at the ubuntu terminal? when should I use the console and when the other one? And what is the

Re: [GRASS-user] question on i.nightlights.intercalibration code

* Markus Metz [2018-06-25 08:29:45 +0200]: [..] The resolution is a bit wrong, it is 0.0083330 but should be 0.008, i.e. exactly 30 arc-seconds. This can be solved with the -a flag of r.in.gdal, or after import with r.region -a. The message 360 degree EW extent is

Re: [GRASS-user] question on i.nightlights.intercalibration code

* Gabriel Cotlier [2018-06-21 18:24:38 -0300]: Hello Veronica, Thanks a lot it worked!! Dear Gabriel, Thanks for posting details and great it works. Don't worry about the last image, there are no coefficients for F18 and 2013. We are forced to skip this image in any analysis. Details

Re: [GRASS-user] i.nightlights.intercalibration, Problem with running code

The following will _not_ work: i.nightlights.intercalibration image= image=$(g.list rast pattern=F* sep=,) suffix=suffix=c model=elvidge2014 Nikos ps- Kind request, please keep posting on the list. * Nikos Alexandris [2018-06-20 04:07:27 +0200]: Dear Gabriel, try

Re: [GRASS-user] i.nightlights.intercalibration, Problem with running code

Dear Gabriel, try this: i.nightlights.intercalibration image=$(g.list rast pattern=F* sep=,) Details: the command `g.list` is not actually run, I think. Use the proper syntax, which is to enclose the command with a "$(g.list type=raster)". In my repository, and in the the manual there is still

Re: [GRASS-user] grass gis book

* Rich Shepard [2018-06-04 05:27:51 -0700]: On Sun, 3 Jun 2018, Francois Chartier wrote: I will start with this: https://grasswiki.osgeo.org/wiki/From_GRASS_GIS_novice_to_power_user_(workshop_at_FOSS4G_Boston_2017) Francois, An excellent choice. I was not aware of this resource so

Re: [GRASS-user] new GRASS virtual raster in trunk

* Markus Metz [2018-06-04 14:37:41 +0200]: A new GRASS virtual raster format has been added to trunk in r72761-4, together with a new module to build a GRASS VRT: r.buildvrt. *r.buildvrt* builds a virtual raster (VRT) that is a mosaic of the list of input raster maps. The purpose of such a

Re: [GRASS-user] new GRASS virtual raster in trunk

* Nikos Alexandris [2018-06-04 15:36:14 +0200]: * Rich Shepard [2018-06-04 05:56:16 -0700]: On Mon, 4 Jun 2018, Markus Metz wrote: A new GRASS virtual raster format has been added to trunk in r72761-4, together with a new module to build a GRASS VRT: r.buildvrt. Markus, For folks like

Re: [GRASS-user] new GRASS virtual raster in trunk

* Rich Shepard [2018-06-04 05:56:16 -0700]: On Mon, 4 Jun 2018, Markus Metz wrote: A new GRASS virtual raster format has been added to trunk in r72761-4, together with a new module to build a GRASS VRT: r.buildvrt. Markus, For folks like me who have not followed this thread please

Re: [GRASS-user] r.mapcalc

* jaindamini [2018-06-01 01:48:41 -0700]: I have been trying to digitize a Landsat 8 image for that in the layer manager I am creating a new raster map for it but it isn't allowing me every time this error arrives. Hi, can

Re: [GRASS-user] GRASS GIS virtual raster data sets

* Markus Metz [2018-06-01 08:24:20 +0200]: On Thu, May 31, 2018 at 10:41 PM, Markus Neteler wrote: On Wed, May 30, 2018 at 4:21 PM, Nikos Alexandris wrote: > Dears, > > I guess there is no GRASS GIS built-in implementation of GDAL's VRT > concept (several related ideas li

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