[GRASSLIST:3541] Re: How to import data from EOS

[Markus Neteler]

On Wed, Apr 17, 2002 at 05:57:24PM -0700, Ray Drapek wrote:
> > The MODIS data is hdf.
> > Has anyone any experience in importing any of these data into GRASS?

Hi,

I am  currently merging a piece of software from below mentioned page into
r.in.hdf. So far I can read all MODIS (only partially working yet for the 2Q
product) and also ASTER. Missing is still the support of geocoding. I hope
to finish that soon (IDL is not needed).

A second problem is the MODIS ISIN projection. A colleague of
mine currently tries to implement it into PROJ4 (recently Czech Krovak
projection was added which we can study now). Without ISIN support in GRASS
the MODIS data are quite unusable unless you use the 'MODIS Reprojection
Tool' (which, however, does not read the 250m 2Q product).

AVHRR you can import with r.in.bin directly. It's just a bit tricky
to set up the Goode Homolosine projection.

Cheers

 Markus Neteler
 
> Some information I picked up from my IDL user's manual (I have not 
> worked with this format myself):
> 
> HDF - Hierarchical Data Format
> 
> The Hierarchical Data Format (HDF) is a multi-object file format
> that facilitates the transfer of various types of data between
> machines and operating systems. HDF is a product of the National
> Center for Supercomputing Applications (NCSA). HDF is designed to
> be flexible, portable, self-describing and easily extensible for
> future enhancements or compatibility with other standard formats.
> The HDF library contains interfaces for storing and retrieving
> images and multi-dimensional scientific data. This version of IDL
> supports HDF 4.1r3. IDL's HDF routines all begin with the prefix
> "HDF_".
> 
> Further information about HDF can be found on the World Wide Web
> at the HDF Information Server:
> 
> http://hdf.ncsa.uiuc.edu
> Alternately, you can send e-mail to hdfhelp at ncsa.uiuc.edu.