[GRASS-dev] t.rast.out.xyz not exporting all cells in the computational region

[Luca Delucchi]

On 28 November 2016 at 14:53, Veronica Andreo <veroandreo at gmail.com> wrote:
> Hello devs,
>

Hi Vero,

> I'm using the add-on t.rast.out.xyz to export my raster time series to a csv
> file. Here's my region definition:
>
> GRASS 7.3.svn (latlong_wgs84):~ > g.region -p
> raster=A20133052013312.L3m_8D_CHL_chlor_a_4km_arg
> projection: 3 (Latitude-Longitude)
> zone:       0
> datum:      wgs84
> ellipsoid:  wgs84
> north:      38S
> south:      55S
> west:       70W
> east:       55W
> nsres:      0:02:30
> ewres:      0:02:30
> rows:       408
> cols:       360
> cells:      146880
>
> By running t.rast.out.xyz I would expect to have a file with 146880 rows
> (number of cells) and columns = the number of maps registered in the raster
> time series plus x & y coordinates. The latter works, I get the expected
> number of columns. However, the number of rows is much lower than expected.
>
> GRASS 7.3.svn (latlong_wgs84):~ > t.rast.out.xyz strds=cla_monthly_average |
> wc -l
>  100%
> Space time raster dataset cla_monthly_average exported to -
>
> 12891 << -- less than 10% of the region!! No mask applied.
>
> I observe the same behaviour when I vary the region size and also, when I
> export to a text file. Is this the expected behaviour? Am I missing
> something?
>

Maybe yes... do you have null cells (read r.out.xyz manual ;-) )?

r.univar can help you to discover the null cells ;-)

>
> Cheers,
> Vero
>


-- 
ciao
Luca

www.lucadelu.org