David Megginson writes: > > Julian Foad writes: > > > It seems *awfully* redundant given that there is already the Id > > *and* the geographical location. > > The lat/lon would be fine for searching inside 10 deg x 10 deg chunks, > but it would get very expensive if we had to store polygons for all > country and region boundaries and do point-inside tests for every > airport. On balance, I think that this is a reasonable optimization.
I hope that this data base is stored in XYZ form and not lat lon else any optimizations you make by spatial partitioning will be nullified by the trig calls required to get distances Norman _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
