Opened 8 years ago

Last modified 7 years ago

#5828 closed defect

gdal_translate (2.0.0dev) performance degrades on wide VRTs (VRT to PNG only, TIFF OK) — at Version 1

Reported by: riveryeti Owned by: warmerdam
Priority: normal Milestone: 2.0.0
Component: GDAL_Raster Version: unspecified
Severity: normal Keywords: vrt
Cc:

Description (last modified by Jukka Rahkonen)

I am using the commandline gdal_translate -of png -co "ZLEVEL=1" [filename].vrt [filename].png to translate two rasters from VRT to PNG (also converting to tiled tiff, but that works fine).

Given two vrt "rasters" with sizes as follows:

59392,201728 (wide raster) 191488,46080 (tall raster)

performance degrades to about 20bytes/sec on the wide raster when I hit about 30% processing (still at 30% + 1 dot 3 hours later). On the other hand, performance does not noticeably degrade when processing the tall raster, and the entire translation takes about 2-3 minutes.

both vrts are built from 1024x1024 uncompressed TIFF tiles generated using otherwise the same methods/settings/projection/coordinate system/etc.

gdalinfo from "good" vrt below (excluding file-list) vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv

Size is 59392, 201728
Coordinate System is:
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
Origin = (-123.610326674747300,48.157496099385916)
Pixel Size = (0.000001641647305,-0.000001100758214)
Corner Coordinates:
Upper Left  (-123.6103267,  48.1574961) (123d36'37.18"W, 48d 9'26.99"N)
Lower Left  (-123.6103267,  47.9354423) (123d36'37.18"W, 47d56' 7.59"N)
Upper Right (-123.5128260,  48.1574961) (123d30'46.17"W, 48d 9'26.99"N)
Lower Right (-123.5128260,  47.9354423) (123d30'46.17"W, 47d56' 7.59"N)
Center      (-123.5615763,  48.0464692) (123d33'41.67"W, 48d 2'47.29"N)
Band 1 Block=128x128 Type=Byte, ColorInterp=Red
  NoData Value=0
Band 2 Block=128x128 Type=Byte, ColorInterp=Green
  NoData Value=0
Band 3 Block=128x128 Type=Byte, ColorInterp=Blue
  NoData Value=0
Band 4 Block=128x128 Type=Byte, ColorInterp=Alpha
  NoData Value=0

gdalinfo from "bad" vrt below (excluding file-list) vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv

Size is 191488, 46080
Coordinate System is:
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
Origin = (-123.657297355231180,48.158143203488351)
Pixel Size = (0.000001374831964,-0.000000920181878)
Corner Coordinates:
Upper Left  (-123.6572974,  48.1581432) (123d39'26.27"W, 48d 9'29.32"N)
Lower Left  (-123.6572974,  48.1157412) (123d39'26.27"W, 48d 6'56.67"N)
Upper Right (-123.3940335,  48.1581432) (123d23'38.52"W, 48d 9'29.32"N)
Lower Right (-123.3940335,  48.1157412) (123d23'38.52"W, 48d 6'56.67"N)
Center      (-123.5256654,  48.1369422) (123d31'32.40"W, 48d 8'12.99"N)
Band 1 Block=128x128 Type=Byte, ColorInterp=Red
  NoData Value=0
Band 2 Block=128x128 Type=Byte, ColorInterp=Green
  NoData Value=0
Band 3 Block=128x128 Type=Byte, ColorInterp=Blue
  NoData Value=0
Band 4 Block=128x128 Type=Byte, ColorInterp=Alpha
  NoData Value=0

end.

Change History (1)

comment:1 by Jukka Rahkonen, 8 years ago

Description: modified (diff)
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