Re: [sahana-maindev] Real Time Tracking

[Fran B. <fl...@pa...>]

Dominic König wrote:
> in view of a standard I'd suppose OpenGIS Sensor Observation Service (SOS) was 
> a good idea, see
> http://www.opengeospatial.org/standards/sos

This can certainly do cool stuff if there's a bunch of sensors deployed:
http://www.openioos.org/

I can see that this could be useful for

It's also supported by our current toolsets.
Convert to GeoRSS (already supported within Sahana GIS):
http://www.openioos.org/cgi-bin/sos2rss
http://mapserver.gis.umn.edu/docs/howto/sos_server
Unreleased OpenLayers code:
http://conference.osgeo.org/index.php/foss4g/2008/paper/view/273


It's not quite Tracking though...which is more about objects moving 
(people?)

I think, as far as OGC goes, OpenGIS Location Service /seems/ more 
relevant here & it mentions emergency response as a use case although 
this is 911-style not major catastrophes:
http://www.opengeospatial.org/standards/ols
However I don't yet see implementations.

We probably don't need to use a heavy standard like this though if we're 
not interested in the routing components.
Simple LatLon updates would be much simpler, or possibly using Format.GPX

Some discussions on using OL for real-time tracking occurred awhile ago 
on their list:
http://openlayers.org/pipermail/dev/2006-October/000058.html
The base functionality of being able to update Markers got fixed after that:
http://trac.openlayers.org/ticket/519


The best existing project I've seen which could possibly be integrated 
is OpenGTS:
http://www.opengts.org/

This can use OL via Mapstraction or GeoServer (the latter being good for 
Un integration).
It's focus is vehicle-tracking, which would also be of most interest to me.
I'm still very unclear as to the requirement being sought after here.

F