[gdal-dev] slow raster (large GDALRasterAttributeTable?)

[bartvde at osgis.nl]

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.

TIA.

Best regards,
Bart