[GRASS-user] CHELSA climate data set

[Veronica Andreo]

Hi :)

JFYI, CHELSA v1.2 is out

2017-02-07 15:43 GMT+01:00 Markus Neteler <neteler at osgeo.org>:

> On Tue, Feb 7, 2017 at 3:32 PM, Markus Metz
> <markus.metz.giswork at gmail.com> wrote:
> [...]
> > Compared to GMTED, CHELSA extents further south to 90:0:0.5S which
> conforms
> > to the GMTED grid geometry. For CHELSA, however gdalinfo reports
> > Pixel Size = (0.008333333300000,-0.008333333300000)
> > while for GMTED, gdalinfo reports
> > Pixel Size = (0.008333333333333,-0.008333333333333)
> >
> > The reason for the slightly smaller pixel size is most probably reduced
> > floating point precision during creation of the CHELSA data.
>
> from personal comm.:
> They are currently investigating where the precision is cut in their
> workflow (the upcoming V1.2 shall come with a related correction).
>

Unfortunately they have not corrected the precision issue...

gdalinfo CHELSA_temp_2_1979-2013_V1.2_land.tif
Driver: GTiff/GeoTIFF
Files: CHELSA_temp_2_1979-2013_V1.2_land.tif
Size is 43200, 20880
[...]
Origin = (-180.000138888850017,83.999860415150010)
Pixel Size = (0.008333333300000,-0.008333333300000)

Corner Coordinates:
Upper Left  (-180.0001389,  83.9998604) (180d 0' 0.50"W, 83d59'59.50"N)
Lower Left  (-180.0001389, -90.0001389) (180d 0' 0.50"W, 90d 0' 0.50"S)
Upper Right ( 179.9998597,  83.9998604) (179d59'59.49"E, 83d59'59.50"N)
Lower Right ( 179.9998597, -90.0001389) (179d59'59.49"E, 90d 0' 0.50"S)
Center      (  -0.0001396,  -3.0001392) (  0d 0' 0.50"W,  3d 0' 0.50"S)
Band 1 Block=43200x1 Type=Float32, ColorInterp=Gray
  NoData Value=-99999

best,
Vero
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