[GRASS-user] d.rast.edit with multiple maps

[Anna Petrášová]

On Sun, Aug 20, 2017 at 12:32 PM, Helmut Kudrnovsky <hellik at web.de> wrote:
> Ken Mankoff wrote
>> I nowe select a map from the dropdown, set the "Cell value:" to 9999,
>> "Width:" to 30 (the resolution of the map), and select the point option,
>> click 3x (3 green "+"'s appear), and then save the raster. If I then
>> inspect it with "r.info", it appears to be a new raster created by this
>> tool (based on the "Comments" section), but the max is not 9999:
>>
>>> r.info DEM
>>
>> +----------------------------------------------------------------------------+
>>  |   Range of data:    min = 341  max = 589
>>   |
>>  |
>>    |
>>  |   Data Description:
>>    |
>>  |    generated by r.patch
>>    |
>>  |
>>    |
>>  |   Comments:
>>    |
>>  |    r.patch --overwrite --quiet input="xceebb34b,DEM_backupcopy_10405"
>> o\
>>   |
>>  |    utput="DEM at DEM"
>>   |
>>
>> +----------------------------------------------------------------------------+
>>
>> If I repeat with the area tool instead of the point tool, and select
>> ~10x10
>> area on a small raster (the region is only 80x50), when I save it it says
>> "rasterizing..." for ~10 minutes and nothing appears to be happening.
>
> now tested it with
>
> System Info
> GRASS version: 7.3.svn
> GRASS SVN revision: r71404
> Build date: 2017-08-15
> Build platform: i386-w64-mingw32
> GDAL: 2.2.1
> PROJ.4: 4.9.3
> GEOS: 3.5.0
> SQLite: 3.17.0
> Python: 2.7.4
> wxPython: 2.8.12.1
> Platform: Windows-Vista-6.0.6002-SP2 (OSGeo4W)
>
> on a very old windows box with the NC sample data set
>
> g.region -p -a raster=elevation at PERMANENT align=elevation at PERMANENT
> r.surf.random output=rrandom
>
> r.info map=rrandom at user1
> Range of data:    min = 1.65429668186334e-005  max = 99.9999642372131
>
> after editing with cell value 9999 in the wxGUI
>
> r.info map=rrandom at user1
> Range of data:    min = 1.65429668186334e-005  max = 99.9999642372131
> r.patch --overwrite --quiet input="x6cd2d029,rrandom_backupcopy_2220"
> output="rrandom at user1"
>
> I've experienced the same behaviour like you at the first step.
>
> but in a second test:
>
> r.info map=rrandom at user1
> Range of data:    min = 1.65429668186334e-005  max = 888888888
> r.patch --overwrite --quiet input="x0738b000,rrandom_backupcopy_2220\"
> output="rrandom at user1"
>
> it seems to be a chronological matter of when you enter the cell value and
> press the area/line/point button.
>
> it works, at least here, when I enter first the cell value, than choose
> area/line/point button, and then beginn to edit.
>
>

Hi,

yes, you first select the value you want to change and then draw
polygons/lines/points and right click to confirm. The width is useful
mostly for drawing lines and points. The rasterization process can
take little bit more time than one would expect, because it calls
r.in.poly several times, but at least it should be more stable than
the vector digitizer (not crashing the gui), because it doesn't use
ctypes. It works actually quite well if you know how to use it but I
unfortunately haven't added the manual yet... Will try to fix that.
It should work on Linux and Windows, I know about the problem on Mac,
but it was not super easy to fix when I looked at it some time ago.



Anna

>
> -----
> best regards
> Helmut
> --
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