Originally Posted by
Juha
The "snapshot" can take several minutes. If you move for 15-20 minutes with the GPS turned off (this seems to be what you want), the receiver has to start searching for satellites again. That time can be reduced with wifi / GSM cell tower triangulation, not sure how much iPhone makes use of those.
The iPhone
with these locates much faster than a GPS without them. They work fairly-well to locate even without a gps signal.
Last edited by njkayaker; 04-19-13 at 05:49 AM.