Nithi, Nachi K (Karun) wrote: > > I am wondering whether GRASS has been used to create near real-time > display of vector maps with a street map (of a state or county) as the > background map (PNG map) and several layers of symbols on top of it. > These additional layers can be, for example, movement of a fleet of > vehicles (each type of vehicle as a separate layer). If we want to > create vector maps frequently with several thousand points (or vehicle > symbols) how responsive GRASS will be in terms of speed and memory > usage. Assume that we want to use mysql as the database and that the > map will be displayed on a web browser.
GRASS isn't really built for this, but is flexible enough to do it if you really want. I hear QGIS is getting a real-time NMEA plugin, but again it suffers the same problem of the task being well outside its design intentsions. Better to start with something built for it like GpsDrive or Kismet? previous m.in.realtime_gps GRASS 5 real-time GPS display: http://grass.itc.it/pipermail/grassuser/2006-September/036438.html http://lists.alioth.debian.org/pipermail/pkg-grass-general/2005-January/000452.html idea for real-time GPS display with GpsDrive using auto-refresh background tiles produced by GRASS's d.out.gpsdrive in a sleep-loop: http://article.gmane.org/gmane.comp.linux.gps/1406 good luck, Hamish _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
