Nols Smit wrote:

> Hi,
>
> I've been asked at work (where large GIS applications are using SQLServer) about FireBird support for PostGIS as in PostgresSQL.
>
> Referring links:
> http://postgis.refractions.net/
> http://www.postgresql.org/about/
>
>
>
> Regards,
>
> Nols Smit
>

No, Firebird doesn't have implemented the R-tree indexes (which are the
core for a spatial engine), even it will be very nice to have them, but
you can use Fb as storage engine and build a customized one for
yourself. See

http://en.wikipedia.org/wiki/R_tree
http://www.dblab.ece.ntua.gr/~mario/rtree/ (nice demo here...)
http://www.rtreeportal.org/

...and follow the other links from these pages if you're interested. You
have there enough source code (in C/C++ or Java) to use if you want to
implement this. Perhaps the Fb team considers to implement them...

hth,

m. th.