[postgis-devel] LWGEOM -- inital version ready for testing

David Blasby dblasby at refractions.net
Thu Apr 29 11:52:12 PDT 2004

There's an inital version of LWGEOM available for testing.  The indexes 
it makes are about 40% smaller, and there's a very significant reduction 
of the actual geometry size.  It natively supports 2D, 3D, and 4D 

Its been tested on a Linux (Intel) machine and a Solaris (Sparc) 
machine.  Norman says it compiles on Windows (cygwin), so it should also 
work there.

If you checkout a CVS copy of PostGIS, you'll see a "lwgeom/" directory.

There's a README file here with lots of details on how to use it.

In summary, to test out the LWGEOM on your system:

      cd lwgeom
      cd regress

Please let me know if you're tried it out and if you had any problems.

ps. I've attached the README file - it contains more detail of how to 
use the LWGEOM type.

pps. Thanks to Ralph Mason who did lots of work doing a lex/yacc WKT/WKB 
parser and writers.
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