[ gpsdrive ] GRIB met data mini-tutorial

[Hamish]

Hamish:
>> I just added a GRIB met data mini-tutorial to the GRASS wiki site:
>>   http://grass.osgeo.org/wiki/GRIB

Chris:
> Since this is all grass dependant is there an interest or intent to
> integrate this into gpsdrive somehow?

I started with loading it into GRASS for easy prototyping and to learn
about the GRIB data. What GRASS adds is the code to render the arrows
and interpolate+create the isobar lines.

It could all be scripted in a cron job, from download to rendering to
export & overwriting the "to_latest_[0]hr_forecast.jpg" tiles. I've
mentioned a bit about that at the end of the wiki page. 

Resolution seems to be at 1deg x 1.5deg, so it's mostly useful at the
country scale.


> Looking at zygrib source and dependencies from my understanding it
> relies on proj4 rather then gdal.

as you know, gdal's support for grib is very new. on the other hand gdal
is much more mainstream so the code is likely to have a bright future.

I'll try out zyGRIB. FWIW, I notice it is licensed GPL3. (GDAL is MIT/X)

proj4 and GDAL are not mutually exclusive, quite the opposite they are
siblings with major overlap in the dev teams.
gdal is data format conversion and input/output, proj4 is the reprojection
stuff.

> How the translation is done however I am of no help..:)

.... we'll see.


Hamish