Perhaps it could use an in-memory bounding prism index? You're using a
disk-based one used for geography types, right?
Paul Ramsey wrote:
On Mon, May 31, 2010 at 10:27 PM, Paragon Corporation <l...@pcorp.us> wrote:
On that thought. Remember how geometry intersects performance significantly
increased with prepared geometry algorithm, are we using that same kind of
prepared geometry logic for geography.
No, we are not. The algorithm is currently brute force O(nm). My ideas
are very similar to the prepared geometry approach, but with some
changes necessary to work in spherical land (like, what are the index
leaves? not rectangles...)
P.
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Martin Davis
Senior Technical Architect
Refractions Research, Inc.
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