On 2008-5-14 14:23, Francois Ochsenbein wrote:
> Well, the self-join example of Jeff and Pat is exactly what I feel would be
> more easily expressed with a sphericalDistance function:
For that example they happen to be equivalent because the only shape is a circle. But we know there are shapes (the bounds of observations, surveys, etc) that are not circles... so we need the generality of INTERSECTS.
-- Patrick Dowler Tel/Tél: (250) 363-6914 | fax/télécopieur: (250) 363-0045 Canadian Astronomy Data Centre | Centre canadien de donnees astronomiques National Research Council Canada | Conseil national de recherches Canada Government of Canada | Gouvernement du Canada 5071 West Saanich Road | 5071, chemin West Saanich Victoria, BC | Victoria (C.-B.)Received on 2008-05-15Z00:30:02