[GRASS-dev] Unexpected EVI range from "i.vi"

Nikos Alexandris nik at nikosalexandris.net
Thu Jun 20 00:31:55 PDT 2013


Nikos Alexandris wrote:

> >> >> > g.region -pagc e=784935 n=2695215 rows=1 cols=1 res=30
> >> > 
> >> > --------------------^^^^^^---^^^^^^^------^------^-----^^
> >> > 
> >> >> > n=2695230
> >> >> > s=2621340
> >> >> > w=658560
> >> >> > e=784950
> >> > 
> >> > ---------vvvvv
> >> > 
> >> >> > nsres=73890
> >> >> > ewres=126390
> >> > 
> >> > ---------^^^^^^

ML:

> >> rows and cols has precedence over res, but res=30 plus -a still has an
> >> effect, so you get an extension that is in multiples of 30, with a
> >> resolution equal to the total extension, since you asked for one row and
> >> one col.

NA:

> > So, "e=784935" and "n=2695215" are set as requested but the "-a" flag
> > cut's
> > off a bit while aligning...

ML:

> It doesn't cut off,

Bien sure! I should put it like "cut's off"... I wanted to say that it simply 
modifies.

> but it extends the region until you hit a multiple of 30:

> n=2695215 is extended northward to n=2695230
> e=784935 is extended eastward to e=784950

Milles mercis, N


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