A location context specifies a circular geographical area in which it is active. It is formed by a centre point (latitude, longitude) plus a radius around that point.
The most accurate provider available (around +-10m), but its performance degrades quickly indoors and it uses a relatively large amount of power.
To set the frequency of GPS fixes, see
Menu / Preferences / Monitor.
GPS Check Time determines the check frequency in seconds while the device
is awake, Off Check Time while the device is asleep.
GPS will only be used for a particular context if it is specified in the location edit screen.
Network will only be used for a particular context if it is specified in the location edit screen.See also: