Ciao Daniele,
The gdalinfo from the file is below:
Size is 598240, 638720
Coordinate System is:
PROJCS["ETRS89 / UTM zone 30N",
GEOGCS["ETRS89",
DATUM["European_Terrestrial_Reference_System_1989",
SPHEROID["GRS 1980",6378137,298.2572221010002,
AUTHORITY["EPSG","7019"]],
AUTHORITY["EPSG","6258"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4258"]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",0],
PARAMETER["central_meridian",-3],
PARAMETER["scale_factor",0.9996],
PARAMETER["false_easting",500000],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AUTHORITY["EPSG","25830"]]
Origin = (539240.000000000000000,4798780.000000000000000)
Pixel Size = (0.250000000000000,-0.250000000000000)
Metadata:
GEOTIFF_NUM__1024__GTModelTypeGeoKey=1
GEOTIFF_CHAR__GTModelTypeGeoKey=ModelTypeProjected
GEOTIFF_NUM__1025__GTRasterTypeGeoKey=1
GEOTIFF_CHAR__GTRasterTypeGeoKey=RasterPixelIsArea
GEOTIFF_NUM__1026__GTCitationGeoKey=This file was created with the ECW JPEG 20
00 SDK build 4.2.0.64 copyright 1998-2005 by ER Mapper. This GeoJP2 header was
translated from the following ER Mapper style registration information:
fOriginX: 539240.000000
fOriginY: 4798780.000000
fCellIncrementX: 0.250000
fCellIncrementY: -0.250000
fCWRotationDegrees: 0.000000
szProjection: EPSG:25830
szDatum: EPSG:25830
GEOTIFF_NUM__3072__ProjectedCSTypeGeoKey=25830
GEOTIFF_CHAR__ProjectedCSTypeGeoKey=Unknown-25830
GEOTIFF_NUM__3076__ProjLinearUnitsGeoKey=9001
GEOTIFF_CHAR__ProjLinearUnitsGeoKey=Linear_Meter
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 539240.000, 4798780.000)
Lower Left ( 539240.000, 4639100.000)
Upper Right ( 688800.000, 4798780.000)
Lower Right ( 688800.000, 4639100.000)
Center ( 614020.000, 4718940.000)
Band 1 Block=1024x128 Type=Byte, ColorInterp=Red
Minimum=11.000, Maximum=255.000, Mean=177.955, StdDev=81.483
Overviews: 299120x319360, 149560x159680, 74780x79840, 37390x39920, 18695x19960
, 9348x9980, 4674x4990, 2337x2495, 1169x1248, 585x624, 293x312, 147x156, 74x78,
37x39
Band 2 Block=1024x128 Type=Byte, ColorInterp=Green
Minimum=18.000, Maximum=255.000, Mean=178.914, StdDev=79.212
Overviews: 299120x319360, 149560x159680, 74780x79840, 37390x39920, 18695x19960
, 9348x9980, 4674x4990, 2337x2495, 1169x1248, 585x624, 293x312, 147x156, 74x78,
37x39
Band 3 Block=1024x128 Type=Byte, ColorInterp=Blue
Minimum=8.000, Maximum=255.000, Mean=172.125, StdDev=85.485
Overviews: 299120x319360, 149560x159680, 74780x79840, 37390x39920, 18695x19960
, 9348x9980, 4674x4990, 2337x2495, 1169x1248, 585x624, 293x312, 147x156, 74x78,
37x39
The layer is EPSG:25830 at both native and declared SRS. To ensure there is no
reprojection the SRS handling is set to "force declared".
At the coverage parameters I had initially SUGGESTED_TILE_SIZE=512,512,
USE_JAI_IMAGEREAD=true, USE_MULTITHREADING=false, but I have switched the last
two parameters to USE_JAI_IMAGEREAD=false, USE_MULTITHREADING=true and I have
experimented an increase in performance: now I have 16 to 18 seconds per map
request, but no later downtime from GeoServer.
The tile caching is as default, enabled for EPSG:900913 and EPSG:4326, but this
option is not triggered as I am trying to build the cache in EPSG:25830. I
don't see any need to use tile caching in this case, since the sole purpose of
the WMS is to serve MapProxy so it can build the WMTS cache.
Best regards,
Fernando Lacunza
De: [email protected] [mailto:[email protected]] En nombre de
Daniele Romagnoli
Enviado el: martes, 02 de abril de 2013 15:33
Para: Fernando Lacunza Prieto
CC: [email protected]
Asunto: Re: [Geoserver-users] Performance with huge JPEG2000
Hi,
can you run a gdalinfo on your file or provide us some more info on the inner
structure of that file (progression order, tiling, decomposition levels, ...)?
Moreover, how did you configure the layer on geoserver?
Please, let us know.
Daniele
On Tue, Apr 2, 2013 at 2:26 PM, Fernando Lacunza Prieto
<[email protected]<mailto:[email protected]>> wrote:
Hello everyone,
I have a really big JPEG2000 file (598240x638720 pixels, about 54 GB) published
in a WMS by GeoServer 2.2 and the GDAL extension. The file is accessed with a
JP2MrSID store. The purpose of that WMS is to serve tiles to MapProxy to build
a WMTS cache.
Unfortunately, the performance is appalling: each GetMap request lasts 10 to 15
seconds, and after that GeoServer stops responding for another 15 to 20
seconds. At this rate, my WMTS cache would be done in about 5 years, and I do
not want to wait so long.
¿Is there some tweaking I can do to increase the performance to acceptable
levels? I am a newbie in both GeoServer and MapProxy, and I fear that my
approach to the problem could be wrong. Therefore, any suggestions to
accomplish the task of building a restful WMTS cache from a JPEG2000 file are
welcome.
Thanks!
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