> I have read in some places that MySQL is not as OGC compliant as PostGIS however I need an official source to prove this.
I won't repeat the links provided by others, go straight to MySQL's documentation for the "authoritative" confirmation you need. Further, there are also official tickets for this support (slated for MySQL 7.0): http://forge.mysql.com/worklog/task.php?id=2377 http://forge.mysql.com/worklog/task.php?id=1326 One of the MySQL developers, Alexey Botchkov, has implemented a MySQL branch (off of 5.1) that provides Buffer(), Distance() Intersection(), Sym_Difference(), Union(). It might be some work, but you could compile this early MySQL branch for some rough benchmarks: http://lenz.homelinux.org/archives/125-New-openGIS-functionality-in-MySQL-available-for-testing.html The only other "free" (but not open source) spatial database I know of is IBM's DB2 with Spatial Extender: http://www-306.ibm.com/software/data/db2/express/download.html I haven't used it, but it could be used as another spatial database source for your benchmarking. Regards, -Justin
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