Jose, You can use /vsigzip/ with /vsicurl
Try gdalinfo /vsigzip/vsicurl/http://www.globalbedo.org/GlobAlbedo29/tiles/2004/h17v04/GlobAlbedo.2004001.h17v04.nc.gz Mike -- Michael Smith Remote Sensing/GIS Center US Army Corps of Engineers From: Jose Gomez-Dans <jgomezd...@gmail.com<mailto:jgomezd...@gmail.com>> Date: Thursday, October 10, 2013 2:33 PM To: gdal-dev <gdal-dev@lists.osgeo.org<mailto:gdal-dev@lists.osgeo.org>> Subject: [EXTERNAL] [gdal-dev] /vsicurl/ and gz files Resent-From: Michael Smith <michael.sm...@usace.army.mil<mailto:michael.sm...@usace.army.mil>> Hi, I was wondering if it's possible to use /vsitar/ to have a peek in .gz files, such as this one: http://www.globalbedo.org/GlobAlbedo29/tiles/2004/h17v04/GlobAlbedo.2004001.h17v04.nc.gz The file is a NetCDF, with 20 different layers. I was hoping to be able to read the file in using /vsitar/ (actually, combining /vsicurl/ and /vsitar/), but using e.g. /vsitar/GlobAlbedo.2004001.h17v04.nc.gz I get: $ gdalinfo /vsitar/GlobAlbedo.2004129.h17v04.nc.gz ERROR 4: `/vsitar/GlobAlbedo.2004129.h17v04.nc.gz' does not exist in the file system, and is not recognised as a supported dataset name. gdalinfo failed - unable to open '/vsitar/GlobAlbedo.2004129.h17v04.nc.gz'. GDAL: In GDALDestroy - unloading GDAL shared library. I also get failures when I try to open remote sample netcdf files using /vsicurl/: $ gdalinfo /vsicurl/http://www.unidata.ucar.edu/software/netcdf/examples/tos_O1_2001-2002.nc VSICURL: GetFileSize(http://www.unidata.ucar.edu/software/netcdf/examples/tos_O1_2001-2002.nc)=2949152 response_code=200 VSICURL: GetFileList(/vsicurl/http://www.unidata.ucar.edu/software/netcdf/examples) VSICURL: Downloading 0-16383 (http://www.unidata.ucar.edu/software/netcdf/examples/tos_O1_2001-2002.nc)... VSICURL: Got reponse_code=206 GDAL_netCDF: ===== calling nc_open( /vsicurl/http://www.unidata.ucar.edu/software/netcdf/examples/tos_O1_2001-2002.nc ) ERROR 1: netcdf error #-33 : NetCDF: Not a valid ID . at (netcdfdataset.cpp,~netCDFDataset,1446) GDAL: GDALClose(/vsicurl/http://www.unidata.ucar.edu/software/netcdf/examples/tos_O1_2001-2002.nc, this=0x1e2ca40) gdalinfo failed - unable to open '/vsicurl/http://www.unidata.ucar.edu/software/netcdf/examples/tos_O1_2001-2002.nc'. GDAL: In GDALDestroy - unloading GDAL shared library. Questions: 1.- Do gzipped files work with /vsitar/? 2.- Are remote/compressed netcdf files useable with GDAL? 3.- How do you select a particular layer if the answer to (2) is yes? Thanks for your time! Jose
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