[GRASS-user] question on i.nightlights.intercalibration code

Nikos Alexandris nik at nikosalexandris.net
Tue Jun 26 00:53:13 PDT 2018


* Markus Metz <markus.metz.giswork at gmail.com> [2018-06-25 08:29:45 +0200]:

[..]

>The resolution is a bit wrong, it is 0.008333333300000 but should be
>0.008333333333333, i.e. exactly 30 arc-seconds. This can be solved with the
>-a flag of r.in.gdal, or after import with r.region -a.
>
>The message
>
>> 360 degree EW extent is exceeded by 0.999827 cells
>
>will change to
>
>> 360 degree EW extent is exceeded by 1 cells
>
>but will not go away, because 360 degree EW extent is exceeded in the input
>data, the first and last column cover the same geographical area. You can
>change your current region to chop of e.g. the first column: set the region
>to the raster, then modify the current region with g.region w=179:59:45W -p
>and use this region for further processing.

I guess this is worth being documented in the manual of the add-on. Would
it also make sense to let the module attempt to perform this "correction"?

Nikos
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