On 21/06/17 16:17, Luís Moreira de Sousa wrote:
Dear all,
I would like to know how to use a mask with the v.surf.idw module. I
have tried using r.mask with both raster and vector maps, but v.surf.idw
always produces a surface encompassing the entire region [0].
Is there any other way of forcing this module to operate within an area
of interest?
As explained in [1]: "Raster input maps are automatically masked if a
raster map named MASK exists. The MASK is only applied when reading maps
from the disk."
This means that the output of v.surf.idw will always cover the entire
computational region. If you want to create a map with null values
outside the mask, you can use r.mapcalc "masked_map = interpolated_map"
while the mask is active.
Moritz
[1] https://grass.osgeo.org/grass72/manuals/rasterintro.html
Thank you.
[0] https://gis.stackexchange.com/questions/244097/v-surf-idw-ignores-mask
--
Luís Moreira de Sousa
Im Grund 6
CH-8600 Dübendorf
Switzerland
Phone: +41 (0)79 812 62 65
Email: luis.de.so...@protonmail.ch <mailto:luis.de.so...@protonmail.ch>
URL: https://sites.google.com/site/luismoreiradesousa
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