And the exact gdaladdo command line you're using ? (must be sure if it's internal or external overviews)
Le Tuesday 09 February 2010 23:22:05 David Fogel, vous avez écrit : > Hi Even: > > The GeoTIFF file is described below (output from gdalinfo). The > pre-compiled code is from Tamas' site: > http://vbkto.dyndns.org/sdk/ > I am using the MSVC2008 version ( scroll to the bottom of the page ). > This ought to be v1.7.0 with some or all of the code for HFA files > folded into it. > > The workstation is running Windows 7 64-bit w/ 8 GB of RAM and too > much disk space to know what to do with .. for the moment. > > Thanks. > = David > > ----- % cut here % ----- > Driver: GTiff/GeoTIFF > Files: Central_North.tif > Size is 119999, 74401 > 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 = (-31.999583000000001,60.000416333276846) > Pixel Size = (0.000833333333333,-0.000833333333333) > Metadata: > AREA_OR_POINT=Area > Image Structure Metadata: > COMPRESSION=LZW > INTERLEAVE=BAND > Corner Coordinates: > Upper Left ( -31.9995830, 60.0004163) ( 31d59'58.50"W, 60d 0'1.50"N) > Lower Left ( -31.9995830, -2.0004170) ( 31d59'58.50"W, 2d 0'1.50"S) > Upper Right ( 67.9995837, 60.0004163) ( 67d59'58.50"E, 60d 0'1.50"N) > Lower Right ( 67.9995837, -2.0004170) ( 67d59'58.50"E, 2d 0'1.50"S) > Center ( 18.0000003, 28.9999997) ( 18d 0'0.00"E, 29d 0'0.00"N) > Band 1 Block=119999x1 Type=Int16, ColorInterp=Gray > NoData Value=-32768 > Metadata: > LAYER_TYPE=athematic > ----- % cut here % ----- > > On Tue, Feb 9, 2010 at 2:09 PM, Even Rouault > > <even.roua...@mines-paris.org> wrote: > > Could you append the output of gdalinfo on the TIF you make overviews on > > and the exact gdaladdo you're using (mainly if you use one particular > > resampling algorithm) ? > > > > Le Tuesday 09 February 2010 22:57:26 David Fogel, vous avez écrit : > >> Hi: > >> > >> In the process of moving data into GeoTIFF, I am re-creating pyramids > >> (OVR files). The good news: It takes fewer than ten minutes to create > >> an LZW Horizontal Differenced compressed 3.5 GB file on a Windows 7 > >> box using GDAL 1.70+ ( via Tamas Szekeres site; 64-bit precompiled ). > >> > >> The OVR files are problematic. Using gdal_translate, I can resize by > >> 50% in less than ten minutes. Using gdaladdo, the first layer ( "2" ) > >> takes hours to complete. > >> > >> This is for SRTM 16-bit data. It appears that something is amiss. > >> > >> Tips and tricks? > >> > >> Thanks! > >> = David > >> _______________________________________________ > >> gdal-dev mailing list > >> gdal-dev@lists.osgeo.org > >> http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
