On Thu, 2009-07-23 at 07:06 -0400, Stephen Frost wrote: > Why do you care about it being in meters..?
Well, all I care about is that it's in some kind of linear length units. Queries might take the form of "what else is within 3 miles of this lat/lon point?". > Just make sure that > st_expand will grow it large enough to be within the distance limit > you're looking for everywhere, and then convert to UTM for the actual > source point and use distance() there to further refine the search. > > Use the bounding box to narrow the search, don't try to use it *as* your > search criteria. > That's what I'm trying to do. But how do I ensure that the bounding box is big enough to account for points near the poles, but not too big for points near the equator? I suppose it's not really necessary for it to be accurate near the poles, but I'm curious why there's not a function that works everywhere. Regards, Jeff Davis _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users