[Qgis-user] qgis extremly slow on grass data. More info

[Jarek Jasiewicz]

Hi
1) There are no problems in GRASS, datafile opens immediately, colors 
are presented OK


2) gdal_translate -of GTiff  ~/grassdata/zdjecia/brovery/cellhd/brovery 
bovrey.tif
Input file size is 853, 946
0Warning 1: Lost metadata writing to GeoTIFF ... too large to fit in tag.
...10...20...30...40...50...60...70...80...90...100 - done.
Warning 1: Lost metadata writing to GeoTIFF ... too large to fit in tag.

image is empty i.e. only null values.



3) gdalinfo ~/grassdata/zdjecia/brovery/cellhd/brovery
also executes immediately, time is 0.447s

the result is as below:



Driver: GRASS/GRASS Database Rasters (5.7+)
Files: /home/jarekj/grassdata/zdjecia/brovery/cellhd/brovery
Size is 853, 946
Coordinate System is:
PROJCS["UTM Zone 33, Northern Hemisphere",
    GEOGCS["wgs84",
        DATUM["WGS_1984",
            SPHEROID["WGS_1984",6378137,298.257223563]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",15],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1]]
Origin = (557973.000000000000000,5779914.000000000000000)
Pixel Size = (57.000000000000000,-57.000000000000000)
Corner Coordinates:
Upper Left  (  557973.000, 5779914.000) ( 15d50'51.45"E, 52d 9'59.99"N)
Lower Left  (  557973.000, 5725992.000) ( 15d50'18.75"E, 51d40'54.84"N)
Upper Right (  606594.000, 5779914.000) ( 16d33'29.85"E, 52d 9'33.90"N)
Lower Right (  606594.000, 5725992.000) ( 16d32'29.76"E, 51d40'29.19"N)
Center      (  582283.500, 5752953.000) ( 16d11'47.42"E, 51d55'16.41"N)
Band 1 Block=853x1 Type=UInt16, ColorInterp=Palette
  Min=0.000 Max=32766.000
  NoData Value=65535
  Metadata:
    COLOR_TABLE_RULES_COUNT=1024
    COLOR_TABLE_RULE_RGB_0=0.000000e+00 3.100000e+01 0 0 0 255 0 0

........

and next are 33822 lines of color table

Its all I can do. It seems problems concern only datafiles with huge pallete
Hope it helps to identify problem (if it is a problem)
regards
Jarek