Hi Frank,
I can (I'll send it to you off-list on Thursday), but the problem
appears to be different. I overlooked the fact that the classification
is being done in Mapserver (about 30 classes), but even with
scalebuckets set I can't get it to speed up.
Best regards,
Bart
Frank Warmerdam wrote:
[email protected] wrote:
Hi list,
I've got a tiff file of 28 Mb and it is really slow, so I am assuming
the
classification gets applied on the fly or something like that.
If I do a gdalinfo I get a huge list of STATISTICS_HISTOBINVALUES
Metadata:
STATISTICS_MINIMUM=-5838
STATISTICS_MAXIMUM=4225
STATISTICS_MEAN=-1010.4585191036
STATISTICS_MEDIAN=-212
STATISTICS_MODE=1
STATISTICS_STDDEV=1833.0113850333
LAYER_TYPE=athematic
STATISTICS_HISTOBINVALUES=1|1|1|1|1|1|1|1|1|1|1|2|1|2|1|1|1|2|1|1|1|1.......
Also, the GDALRasterAttributeTable has 9150 rows. Don't know if this is
related.
Any ideas on how to speed this up? I tried to write it out to a new
GeoTiff or MrSID file, but somehow all this info is preserved, and the
slowness continues.
Bart,
Could you provide the dataset? I'd be interested in reviewing the
performance of the raster attribute table logic with an eye towards
optimizing it.
Best regards,
--
Bart van den Eijnden
OSGIS, Open Source GIS
[email protected]
http://www.osgis.nl
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