wrote:
Wolfgang S. Rupprecht wrote:

writes:
A smartphone with Google Latitude enabled will update it's location
periodically if there is a cellular signal. If the phone has GPS, the
position is very accurate.

I only see accurate locations reported on my HTC G1 "googlephone" when
the phone user looks at the map on the phone. That seems to power up
the GPS and latitude defaults to the GPS if it is powered up. At all
other times the phone seems to default to cell tower locations.

Of course, the answer is to leave Google Maps in the foreground.
I made a trip yesterday with Google Maps on the display, instead of in the
background.
I usually leave it in the background so it won't constantly be fetching
map tiles...

The resulting latitude history map looks very accurate. The spots are
obviously not cell locations. I can tell by the time stamps when I had
Google in the foreground verses background, and it exposes lack of cellular
coverage along the route.

http://www.google.com/latitude/apps/history

Foreground won't work for my idea of finding a lost family member, but it
could work for horse trails, and provide a KML to review your track in
Google Earth.

--
Clarence A Dold - Hidden Valley Lake, CA, USA GPS: 38.8,-122.5