Dejan Gambin wrote:
Hi,
I have successfully clasified the dana in .asc file and it is looking
good. I am just seeing some lack in performance so I would just like to
know if there are some performance tips I can use, similar to other
raster performance techniques (tiling, tileindexes, overviews)?
Dejan,
Convert it to GeoTIFF!
Seriously, ascii grid files are an interchange format, not a working format.
It is surprisingly expensive (from a performance point of view) to parse
big ascii files and convert all those numbers into internal binary form.
gdal_translate your.asc your.tif
If the dataset is large, tiling and overviews (as normal) may be helpful.
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED]
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | President OSGeo, http://osgeo.org
