[R-sig-Geo] What is the latest re: reading HDF files with R?

[Roger Bivand]

On Wed, 10 Jan 2007, Rick Reeves wrote:

> Good idea, Scott. I had forgotten about rgdal. Doesen't come up in the R 
> topic search. RR

You'll need a build of the GDAL library against HDF - which platform are
you using? I believe these formats can be accessed from GDAL, but
confirmation would be welcome. If not Windows, you will be installing a
source rgdal package anyway, if Windows, there are ways round using the
DLLs in FWTools - ask if you need guidance.

Roger

> 
> Scott W Mitchell wrote:
> > I have never done this, so may be missing something obvious, but can 
> > you not use rgdal ?  GDAL lists HDF4 as a supported format.
> >
> > Cheers,
> > Scott
> >
> > On 10-Jan-07, at 14:49, Rick Reeves wrote:
> >
> >>
> >> Greetings:
> >>
> >> This week I am working with HDF format files containing ocean color 
> >> imagery (CZCS, SeaWIFS) secured from NASA GSFC,
> >> and would like to bring the image maps into the R environment.
> >>
> >> One way I have done this is to use the SeaDAS software to extract a 
> >> 2-dim binary floating point matrix (from the HDF file)
> >> and write it to disk, then use R pixmap() to read it in to a vector. 
> >> This works, but one loses all of the image attributes
> >> contained in the HDF header. Now, it would be good to read the HDF 
> >> file directly into R, capturing the header attributes.
> >>
> >> I have tried the R HDF5 library routine hdf5load(), which seems to 
> >> read the new .hdf5 format
> >> but NOT the older .hdf format (I tried, unsuccessfully)
> >>
> >> Question is: Has anyone developed a technique to read HDF files with R?
> >>
> >> Thanks in advance, Rick R
> >>
> >> --Rick Reeves   
> >> Scientific Programmer / Analyst   
> >> National Center for Ecological Analysis and Synthesis
> >> UC Santa Barbara
> >> reeves at nceas.ucsb.edu
> >> www.nceas.ucsb.edu
> >> 805 892 2533
> >>
> >> <reeves.vcf>
> >> _______________________________________________
> >> R-sig-Geo mailing list
> >> R-sig-Geo at stat.math.ethz.ch
> >> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
> >
> 
> 

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no