Marius M. (2) [Avatar] Offline
#1
Could be PostGIS + PostgreSQL a good choice to:

1. Store more than 5 million moving objects changing Latitude + Longitude in real time;
2. Fast processing queries;
3. Calculate radius around moving objects;
4. Distance on the streets between moving objects (North America);
5. Placing the moving objects on a map.
regina.leo (260) [Avatar] Offline
#2
Yes. Several companies use it for that, e.g.

collecting massive streams of GPS data in real-time, doing spatial analysis on that data (I think PostGIS is the fastest relational spatial engine even when compared to commercial offerings), and also showing on map in real-time.
Marius M. (2) [Avatar] Offline
#3
Wonderful,

Appreciate for fast reply smilie