On Fri, 8 Jun 2007, Tom Russo wrote: > Without the rtrees, every time you zoom or pan a map, all the shapefiles > in it are searched linearly for shapes that overlap the screen. With rtrees, > a fast lookup can be done to access only those shapes that overlap without > searching through the entire file. It can make things a lot faster if you're > doing a lot of zooming and panning.
Unless you're zoomed out most or all of the way for the Shapefile anyway, in which case it's just as fast to load the whole Shapefile without rtree support at all. If you're using very large (area) Shapefiles or are zoomed in a lot, rtree support _really_ makes rendering faster. -- Curt, WE7U. archer at eskimo dot com http://www.eskimo.com/~archer Lotto: A tax on people who are bad at math. - unknown Windows: Microsoft's tax on computer illiterates. - WE7U. The world DOES revolve around me: I picked the coordinate system!" _______________________________________________ Xastir mailing list Xastir@xastir.org http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir