On Mar 12, 2010, at 6:31 AM, Mike Grant wrote: > Hi Howard, > > On 25/02/10 16:10, Howard Butler wrote: >> I would like to >> propose that we provide a liblas.org VLR record that contains an XML >> file to describe the dimensions, their sizes, if they are used, etc. > [snip] >> I propose each entry in the file have the following attributes: > > Not sure if LAS mandates a global endian format, but it'd be good to > include that if not.
All three of the specs say "All data is in little-endian format." > >> All this would be properly namespaced XML (liblas.org or something) >> along with whatever we can find for standards such as those for >> describing data types, etc. Maybe there's an existing standard for >> something like this already, I don't know. > > I've come across two things that might be worth looking at - they're not > directly usable here, but they may provide some guidance/ideas: > > http://www.gdal.org/ogr/drv_vrt.html (also > http://www.gdal.org/gdal_vrttut.html) > - GDAL's XML format for describing data (see the fields section) Heh, VRT's actually my counter-example. It's home-grown, it doesn't have a schema to validate against, it can't live in a namespace, and it makes up its own names for everything. > > http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.4/ch03s05.html > - CF Conventions for netCDF data (bitfields section) ooh, I hate netCDF's approach :) > On a vaguely related note, it'd be nice to have a VLR XML (ISO) that > described the dataset for archival and metadata purposes. Have an example? _______________________________________________ Liblas-devel mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/liblas-devel
