On Wed, Jul 25, 2007 at 05:45:49PM -0600, we recorded a bogon-computron collision of the <[EMAIL PROTECTED]> flavor, containing: > Tom Russo wrote: > > On Tue, Jul 24, 2007 at 10:09:28PM -0600, we recorded a bogon-computron > > collision of the <[EMAIL PROTECTED]> flavor, containing: > > <snip> > >> It's just that they're so awfully slow to load from my hard drive -- I > >> would have thought they'd almost HAVE to be faster than loading a map from > >> the internet, but they actually take maybe 4 or 5 times as much time. > >> > > > > It is because of the essential difference between them. > > > > The on-line maps are being downloaded as rendered images. The shapefiles > > are > > being rendered by Xastir, and each line is being read in, examined, drawn > > and labeled. > > > > For big shapefiles such as county-wide TIGER/Line data this can be very > > slow. > > Rtree helps it somewhat (by generating a spatial index so it doesn't have > > to > > do very slow linear searches through the data), but there's just so much > > you can speed it up without doing a lot of special preparation on the data > > files (some folks here have done that). > > > Is there some way to simply drop the amount of detail as I zoom out to a > larger area? I sure don't need to see every little dirt road and cow path > when I'm looking at an entire state.
Make sure that "enable map levels" is turned on. The dbfawk files *should* be set up to do exactly as you say, but if enable map levels isn't turned on, then everything is always displayed. -- Tom Russo KM5VY SAR502 DM64ux http://www.swcp.com/~russo/ Tijeras, NM QRPL#1592 K2#398 SOC#236 AHTB#1 http://kevan.org/brain.cgi?DDTNM "And, isn't sanity really just a one-trick pony anyway? I mean all you get is one trick, rational thinking, but when you're good and crazy, oooh, oooh, oooh, the sky is the limit!" --- The Tick _______________________________________________ Xastir mailing list [email protected] http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir
