Topic: Idea of position precision sensor and display it on map
The idea is:
1. To create new sensor type "position precision" measured in meters.
2. In Unit properties window insert check box "Show circle according to position precision sensor.
3. Show position precision circle in map together with track and current position of unit. GPS precision almost has 5 meters in range from 5 to 200 meters. If unit has no GPS or it is jammed. Some unit can calculate position from GSM and show it with precision from 100m(downtown) to 10km(out city).