[GRASS-user] Perform resample a raster using another image as a reference for the process?

Nikos Alexandris nik at nikosalexandris.net
Wed Aug 3 12:55:25 PDT 2016

Eddison wrote:

>> >>> Hello thank you very much , you can put some screenshots of the
>> >>> process?

Helmut Kudrnovsky:

>> >> have a look at https://grass.osgeo.org/grass70/manuals/g.region.html
>> >> -a     Align region to resolution raster=name[,name,...]

>> See also
>> https://grasswiki.osgeo.org/wiki/Computational_region

>> >> Set region to match raster map(s)
>> >> g.region -a raster=your_raster_you_want_align_to

Nikos Alexandris:

>> > Also useful (to read and use):
>> > https://grass.osgeo.org/grass70/manuals/r.resample.html

Markus Neteler:

>> For an overview, see also
>> https://grasswiki.osgeo.org/wiki/Interpolation

>> PS: I have now added the second link to all relevant manual pages

Eddison Araya:

>Hello thank you very much , then the command is as follows:
>g.region -a -p raster=lsat5_1987_10 align=urban  ?

Eddison, the command is as Helmut proposed in one of his first posts
(see below).

Essentialy, you want to set the extent of the region (within which
grass' raster modules will operate) to match a raster map's dimensions.

That is,

g.region raster=Your_Raster_Map

And, even more, you want to force the alignment of the extent to this
map.  This is done by addin the -a flag:

g.region -a raster=Your_Raster_Map

That's it, nothing more.


ps-  Please, if you would like, keep bottom posting so as to to preserve flow of the

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