Re: GPS
- From: Gordon H <Gordon@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Sat, 16 Jun 2007 11:13:16 +0100
Paul Saunders <pvs1@xxxxxxxxxxxxxxxxxxxxx> writes
But is it their GPS that's telling them, or is it their own fault for
putting in a waypoint and trying to follow a simple GOTO? Assuming they have
a car GPS that calculates road routes, there could be some kind of error in
the map data, if this is a common occurence in your location. I've noticed
on my GPS mapping that sometimes rough tracks are shown as roads, so it
might advise you to drive a route which isn't sensible for a normal car. The
data could also be out of date, if roads have since been blocked off.
Another possible cause is simply bad reception. Inside a car surrounded by
high buildings is not the best place to get good reception with a GPS.
There's also the possibility of signal path errors caused by reflections off
buildings.
Paul
All GPS systems have to be used intelligently. :-)
I have occasionally been directed along single-track roads when I had told my in-car Sat_Nav to find the *shortest* route, but have never driven into a dead end or into a lake, canal or farm track with it.
:-)
It has helped me to get to start points for walks in the country without close map navigation, and also to find a destination in spite of detours due to road closures, an invaluable feature.
I start from home with it set to *fastest* route, then when I get within a few miles I change to *shortest* route and let it re-calculate the tricky bits through the lanes instead of sending me off on a circuitous motorway tour.
It works quite well.
--
Gordon H
(Remove invalid to email)
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