On 16-1-2010 16:03, Mateusz Loskot wrote:
Jan Hartmann wrote:
Yes, that is clear, thanks. I see that at the moment only raster files
are supported.
Would it make sense to do this for vector formats too?
The VSI layer is available to all parts of GDAL and OGR.
If you scan source code of OGR drivers, you'll find that this feature
is already used by, for example, GTM driver:
http://trac.osgeo.org/gdal/browser/trunk/gdal/ogr/ogrsf_frmts/gtm/gtm.cpp?rev=17612#L339
IOW, VSI layer is available and not dependant on GDAL or OGR format,
it's a separate library of common functions.
Best regards,
Does that mean that I can use ogrinfo on a gzipped archive, like
gdalinfo (http://trac.osgeo.org/gdal/wiki/UserDocs/ReadInZip)? This page
says:
"The fact that this new capability is implemented as virtual file
systems imply that it will only work for GDAL drivers supporting the
"large file API""
It would be a nice archive functionality. At the moment I store my
raster files in a directory tree and retrieve information on some or all
of them with small scripts calling gdalinfo and filtering the results. I
know now that I can put the files in a gzip archive, while still be able
to do the same queries. If the same would be possible for vector maps, I
could store everything in one large file for backup.
Jan
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