[Gdal-dev] Gdal and pyramid files

[Tim Sutton]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi again

I have been comparing the performance of (gdal based) qgis against  * ahem * 
arcmap using the Nasa blue marble visible earth dataset (two tiffs totalling 
roughly 2.8gig). In general arcmap rendering is faster, especially when 
zoomed out so that most or all of the dataset is in view.

I found the following message in the archives:

http://remotesensing.org/pipermail/gdal-dev/2003-August/000948.html

And was wondering if the use of rrd files is automatic in the gdal tiff 
driver, or if there is something special I need to "activate"?

On a similar note, if I create overviews using the gdaladdo utilitiy, does 
gdal automatically look for and use the associated .ovr file?

Lastly, is it possible call gdaladdo programmatically?

Many thanks

Tim Sutton
- -- 
The only reason for time is so that everything doesn't happen at once 
 --Albert Einstein 

Get my public keys from:

http://tim.suttonfamily.co.uk/modules.php?name=Content&pa=showpage&pid=2
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.2 (GNU/Linux)

iD4DBQFAj5ljWvXTJUo0BDoRAoA9AJUcaMYRhBku6AVMhwbQIP6fY0l4AKCYDtUX
DAD+ExEfG05NSGlpFichKg==
=uzjy
-----END PGP SIGNATURE-----