[GRASS-user] Has GRASS been used to create near real-time display of geomap?

[Brad Douglas]

On Mon, 2007-07-16 at 14:37 -0500, Nithi, Nachi K (Karun) wrote:
> Hi All,
> 
> 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.

I've considered this, but have done little regarding it.  One option is
to have a WMS server that refreshes periodically.  Or you could script
it in GRASS, but that really isn't what GRASS is for (not that there are
any limits on usage, but it seems like overkill).

Another possible option is to adapt this program to your needs:
http://www.xastir.org/

Xastir is a simple application with real-time tracking that is used in
the amateur radio community.  I use it to monitor positions of research
balloons and recovery teams (in relation to my own) for Stanford.  I
must admit, though, the software needs some modernization.


-- 
Brad Douglas <rez touchofmadness com>                    KB8UYR/6
Address: 37.493,-121.924 / WGS84    National Map Corps #TNMC-3785