On 2012/09/21 20:54, Martin Gregorie <mar...@gregorie.org> wrote:
> Are you sure that the iPhone is using a GPS fix when it is indoors? Most
> phones can also get their position by triangulation off the cell network
> and will fall back to that method whenever the GPS signal is blocked by
> buildings or scrambled by multipath reflections. Can the iPhone or its
> location app let you find out which location method it is currently
> using?

Good point.  It should also be noted that XCSoar explicitly asks the
Android operating system for a GPS fix, which disables GSM/WiFi
triangulation.  Maybe Google Maps or any other app gets a fix, but
that doesn't imply GPS availability, unlike XCSoar.

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