[GRASS-user] TRMM (3B43) handling

[Markus Metz]

nikos ves wrote:
> On Wed, 2010-11-17 at 10:08 +0100, Markus Metz wrote:
>> Another option:
>> get binary grids from here
>> ftp://disc2.nascom.nasa.gov/data/TRMM/Gridded/3B43_V6/
>> read
>> ftp://disc2.nascom.nasa.gov/data/TRMM/Gridded/3B43_V6/3B43.ctl
>>
>> import into a latlon location with r.in.bin -f -b north=50 south=-50
>> east=180 west=-180 rows=400 cols=1440, e.g.
>> r.in.bin -f -b input=3B43.100101.6.precipitation.bin
>> output=3B43.100101.6.precipitation north=50 south=-50 east=180
>> west=-180 rows=400 cols=1440
>
> i was comparing the output rasters with a png [1] a same period.
> eg Jul_2006. it seems that in the bin [2] file N is S and vise versa.
> The phenomenon can be seen clearly by comparing the western coast of
> India between [1] and [2]
>
> I don't think I'm doing something wrong, but can anyone cross check just
> to be sure I didn't anything stupid on my side?
>

Confirmed, that's maybe the reason why these binary grids are well hidden.

Looks like there is no way around setting GCPs and using i.rectify,
either with these binary grids or with the hdf dumps.

Markus M