[GRASS-user] Change elevation value for entire DEM raster cell [UPDATE 2]

[Helmut Kudrnovsky]

Rich Shepard wrote
> On Thu, 23 Mar 2017, Rich Shepard wrote:
> 
>> What raster module will allow me to specify the new value of a DEM cell
>> if
>> I provide the easting and northing coordinates?
> 
>    Using v.in.ascii instead. File blocked_culvert.txt in mapset topography
> contains:
> 
> 2295820.0|175258.0|160.0
> 2295820.0|175257.0|160.0
> 2295821.0|175258.0|160.0
> 2295821.0|175257.0|160.0
> 
>   But, GRASS cannot read this file:
> 
> v.in.ascii input=blocked_culvert.txt output=blocked_elev --overwrite
> ERROR: Unable to open input file 
> <blocked_culvert.txt>
> .
> 
>    I'm not seeing my error here.

see the manual https://grass.osgeo.org/grass73/manuals/v.in.ascii.html

Example 3 - point format mode
Generate a 2D points vector map 'points.dat' as ASCII file:

1|1664619|5103481|studna
2|1664473|5095782|kadibudka
3|1664273|5101919|hruska
4|1663427|5105234|mysi dira
5|1663709|5102614|mineralni pramen

Import into GRASS:

cat points.dat | v.in.ascii in=- out=mypoints x=2 y=3 cat=1 \
    columns='cat int, x double precision, y double precision, label
varchar(20)'

and the description of columns:

columns=string
    Column definition in SQL style (points mode)
    For example: 'x double precision, y double precision, cat int, name
varchar(10)'



-----
best regards
Helmut
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