[GRASS-user] download MODIS data (MOD43B3)

[Chemin, Yann (IWMI)]

Hi all,

Reopening an old thread, to know if any new knowledge has been acquired about the MODIS v005 SIN->LatLong reprojection in GDAL, within our GRASS perspective.

I may have time to look into it in a future project, but would not want to discover somebody went over it already...

Thank you,
Yann
________________________________________
From: neteler.osgeo at gmail.com [neteler.osgeo at gmail.com] on behalf of Markus Neteler [neteler at osgeo.org]
Sent: Tuesday, October 04, 2011 1:38 PM
To: Chemin, Yann (IWMI)
Cc: GRASS user list
Subject: Re: [GRASS-user] download MODIS data (MOD43B3)

On Tue, Oct 4, 2011 at 9:23 AM, Chemin, Yann (IWMI) <Y.Chemin at cgiar.org> wrote:
> It asks for pyMRT...

I would really need the error message since there is no trace of
a "pyMRT" error message in r.modis.*

Perhaps you mean pyModis? This is part of the module set.


> Does the GDAL-dev mailing list know about the geolocation error issue?

I was in contact with Gail Schmidt (MRT developer) from NASA about this
years ago (MODIS V003 and V004 when MODIS was still in ISIN, I posted
that to gdal-dev some years ago but didn't gain much attention ...
For ISIN (nowadays MODIS is in SIN), the source code is here:
mrt4.1/MRT/resample/calc_isin_shift.c

I am not sure about any potential projection shifts in SIN (MODIS V005),
but the source code of MRT is available if anyone wants to investigate.
Or run comparative test cases in different parts of the world....

For r.modis.* we decided to take the secure route and used MRT.

Markus