[GRASS-user] v.surf.idw Not Working

Mon Feb 15 10:51:53 PST 2021

Thank you for your message. I was able to get v.surf.idw working. I posted
the original question because I am struggling to use the r.mblend add-on
module. I have reached out and worked with the r.mblend authors on Github
but still haven't been able to solve my issue. The error I am getting has
to do with v.surf.idw:

Traceback (most recent call last):
  File "/Users/michaelalobato/Library/GRASS/7.8/Modules/scripts/r.mblend",
line 282, in <module>.
    main()
  File "/Users/michaelalobato/Library/GRASS/7.8/Modules/scripts/r.mblend",
line 257, in main
    gscript.run_command('v.surf.idw', input=points_edges, column=COL_VALUE,

  File
"/Applications/GRASS-7.8.app/Contents/Resources/etc/python/grass/script/core.py",
line 441, in run_command
    return handle_errors(returncode, returncode, args, kwargs)
  File
"/Applications/GRASS-7.8.app/Contents/Resources/etc/python/grass/script/core.py",
line 342, in handle_errors
    raise CalledModuleError(module=None, code=code,
grass.exceptions.CalledModuleError: Module run None v.surf.idw
input=tmp_3289117 column=value output=tmp_3289118
 power=2 npoints=50 ended with error
Process ended with non-zero return code -9. See errors in the (error)
output.
WARNING: No data base element files found
WARNING: No data base element files found
WARNING: No data base element files found
WARNING: No data base element files found
WARNING: No data base element files found
WARNING: Table <tmp_3289111> linked to vector map <tmp_3289111> does not
 exist

The author said that "*The v.surf.idw module is failing because it can not
find the attribute table of one the vector layers. This probably means
something is going on with the GRASS bank-end database.*" and requested the
following information:

db.connect -p

>driver: sqlite

>database:
/Users/michaelalobato/Documents/Research/grassdata/newChampaign/test_champaign/sqlite/sqlite.db

>schema:

>group:

sqlite3
/Users/michaelalobato/Documents/Research/grassdata/champaign/PERMANENT/sqlite/sqlite.db

sqlite> .tables

>sqlite>

As you can see, when I try to list the existing tables, nothing comes up.
After this issue, I started working with just v.surf.idw to see if it might
be an issue with the module itself, but that seems to be working fine. Does
anyone have any suggestions as to how to solve the v.surf.idw issue that
I'm having within the mblend module?

Thanks!

Michaela

On Fri, Feb 12, 2021 at 2:06 PM Micha Silver <tsvibar at gmail.com> wrote:

> I tried with your shapefile, and got no errors. Here are the steps...
> First I created a new GRASS location matching the CRS of the shapefile:
>
> grass -c Coal-Test-Shapefile-main/coal_test.shp
> /home/micha/GIS/grass/michaela
>
> Check the projection:
>
> g.proj -p
> -PROJ_INFO-------------------------------------------------
> name       : RD/83 / 3-degree Gauss-Kruger zone 5
> ellps      : bessel
> proj       : tmerc
> lat_0      : 0
> lon_0      : 15
> k          : 1
> x_0        : 5500000
> y_0        : 0
> no_defs    : defined
> -PROJ_EPSG-------------------------------------------------
> epsg       : 3399
> -PROJ_UNITS------------------------------------------------
> unit       : meter
> units      : meters
> meters     : 1
>
> Then I imported your shapefile, and *set the computational region*:
>
> v.import Coal-Test-Shapefile-main/coal_test.shp output=coal_test
> g.region -ap vect=coal_test  # Resolution is 1 meter, 1500x1500 pixels
>
> Now run the IDW module
> v.surf.idw input=coal colu=dbl_1 out=coal_idw_1
> 81 points loaded
> Interpolating raster map <coal_idw_1> (1500 rows, 1500 columns)...
>  100%
> v.surf.idw complete.
>
> Resulting image is attached. You can try other options to v.surf.idw to
> get a smoother interpolation, if necessary.
> HTH
>
>
> On Fri, Feb 12, 2021 at 8:35 PM Michaela Lobato <amlobat2 at illinois.edu>
> wrote:
>
>> Hi Markus,
>>
>> Here is the information:
>>
>> v.info
>> <https://urldefense.com/v3/__http://v.info__;!!DZ3fjg!su4kgK-rm3i3fkT6KC-kE_hjXbF5pCij7S42kVaSVg0b_TRbTvBkaCzT2EXwTHYqYGg$>
>> -c map=coal_test at PERMANENT
>> INTEGER|cat
>> INTEGER|cat_
>> INTEGER|int_1
>> INTEGER|int_2
>> DOUBLE PRECISION|dbl_1
>> DOUBLE PRECISION|dbl_2
>> DOUBLE PRECISION|dbl_3
>> DOUBLE PRECISION|dbl_4
>> DOUBLE PRECISION|dbl_5
>> Displaying column types/names for database connection of layer <1>:
>>
>>
>> v.info
>> <https://urldefense.com/v3/__http://v.info__;!!DZ3fjg!su4kgK-rm3i3fkT6KC-kE_hjXbF5pCij7S42kVaSVg0b_TRbTvBkaCzT2EXwTHYqYGg$>
>> -t map=coal_test at PERMANENT
>> nodes=0
>> points=96
>> lines=0
>> boundaries=0
>> centroids=0
>> areas=0
>> islands=0
>> primitives=96
>> map3d=0
>>
>> You can also find the file here
>> https://github.com/amlobat2/Coal-Test-Shapefile
>> <https://urldefense.com/v3/__https://github.com/amlobat2/Coal-Test-Shapefile__;!!DZ3fjg!su4kgK-rm3i3fkT6KC-kE_hjXbF5pCij7S42kVaSVg0b_TRbTvBkaCzT2EXwARqNnlY$>.
>> Let me know if you need any additional information.
>>
>> Best,
>> Michaela
>>
>>
>> On Fri, Feb 12, 2021 at 3:29 AM Markus Neteler <neteler at osgeo.org> wrote:
>>
>>> Hi Michaela,
>>>
>>> On Thu, Feb 11, 2021 at 11:47 PM Michaela Lobato <amlobat2 at illinois.edu>
>>> wrote:
>>> >
>>> > Hello,
>>> >
>>> > I have recently been struggling with an issue in GRASS. I am a new
>>> GRASS user and recently downloaded version 7.8.5 for my MacBook (macOS
>>> Catalina).  I converted this sample dataset to a shapefile.
>>>
>>> Could you make this shapefile available? Or post the data structure?
>>>
>>> # attribute table  structure
>>> v.info
>>> <https://urldefense.com/v3/__http://v.info__;!!DZ3fjg!su4kgK-rm3i3fkT6KC-kE_hjXbF5pCij7S42kVaSVg0b_TRbTvBkaCzT2EXwTHYqYGg$>
>>> -c coal_test
>>>
>>> # vector types
>>> v.info
>>> <https://urldefense.com/v3/__http://v.info__;!!DZ3fjg!su4kgK-rm3i3fkT6KC-kE_hjXbF5pCij7S42kVaSVg0b_TRbTvBkaCzT2EXwTHYqYGg$>
>>> -t coal_test
>>>
>>> ?
>>>
>>> Best,
>>> Markus
>>>
>>
>>
>> --
>> A. Michaela Lobato
>> BS Systems Engineering and Design | Autonomous Systems and Robotics |
>> December 2019
>> MS Systems and Entrepreneurial Engineering | Decision and Control | In
>> Progress
>> Email: amlobat2 at illinois.edu | Cell: (815) 494-1111
>>
>> _______________________________________________
>> grass-user mailing list
>> grass-user at lists.osgeo.org
>> https://lists.osgeo.org/mailman/listinfo/grass-user
>> <https://urldefense.com/v3/__https://lists.osgeo.org/mailman/listinfo/grass-user__;!!DZ3fjg!su4kgK-rm3i3fkT6KC-kE_hjXbF5pCij7S42kVaSVg0b_TRbTvBkaCzT2EXwXgT18BA$>
>>
>
>
> --
> Micha Silver
> Ben Gurion Univ
> Sde-Boker Remote Sensing Lab
> cell: +972 (52) 3665918
>

-- 
A. Michaela Lobato
BS Systems Engineering and Design | Autonomous Systems and Robotics |
December 2019
MS Systems and Entrepreneurial Engineering | Decision and Control | In
Progress
Email: amlobat2 at illinois.edu | Cell: (815) 494-1111
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20210215/4233cf45/attachment-0001.html>