Opened 9 years ago
Last modified 9 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 )
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.
