[R-sig-Geo] early rgdal example

[Timothy H. Keitt]

Yes, I think the issue was size and Roger was right to not include a
54MB file in the package! I had it there originally simply because I
thought it was cool that you could easily display a 54MB file in R.
(GDAL is good at subsampling images.)

BTW, I can report a recent rgdal success. We've been working with global
MODIS 1/2 kilometer datasets which are huge. My student was using
ArcGrid, but it sputters and dies just thinking about files that large
(its amazing to me that someone can charge those prices for code that
can't catch out-of-memory exceptions!) Five lines of code in R was
enough to row-by-row multiply a few gigs of data. Took a couple of
minutes. Less time than restarting our lone XP box after ArcGIS took it
down.

T.

On Mon, 2004-08-23 at 01:27, Roger Bivand wrote:
> On Mon, 23 Aug 2004, Hisaji ONO wrote:
> 
> > Hi.
> > 
> >  Timothy H. Keitt's web page for early rgdal had tutorial using DEM of
> > Madagascal$B!!(Band its surroundings.
> > 
> >  I remembered this example was better than current rlogo examples because
> > gdal is originally used for geo-spatial data.
> > 
> >  However I couldn't find this "original " web page.
> > 
> >  Can I see this page again?
> 
> Unless someone has a copy, no. It isn't on sourceforge, as far as I can 
> see. The underlying files were E020S10.*, the DEM being 54MB, so a bit big 
> to distribute with the package. "Small file" and "remoe sensing" seem to 
> be contradictory. Shall I add a new Madagascar page to the sourceforge 
> page - since the page needs editing to add a link to Prof. Ripley's VC++ 
> Windows binary of rgdal 
> 
> (http://www.stats.ox.ac.uk/pub/RWin/rgdal_0.2-7.zip) 
> 
> anyway?
> 
> By the way, has anybody tried to build Rmap against the VC++ gdal12.dll in 
> Prof. Ripley's build of rgdal? Contact me for details of his approach.
> 
> Roger
> 
> > 
> > 
> >  Regards.
> > 
> > _______________________________________________
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> > R-sig-Geo at stat.math.ethz.ch
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> > 
-- 
Timothy H. Keitt
Section of Integrative Biology
University of Texas at Austin
http://www.keittlab.org/