Handling Large Errors (Gps); Map Matching; When The Positioning By Gps Is Impossible - Pioneer AVIC-D3 Operation Manual

In tunnels or enclosed parking garages
errors are kept to a minimum by com-
Dead and map matching.
in some these
may not work properly, and the error may become
When the positioning by GPS is
impossible
• If cannot be received from more than
two GPS satell GPS positioning does not
take
• In some driving from GPS
satellites may not reach your vehicle. In this
case, it is for the to use GPS
Hand ling Large Errors
Without map matching
With map matching
Map matching
As the and dead reckoning sys-
tems used by this are
ble to certain errors. Their calculations may, on
you in location on the map
where no road exists. In this the pro-
understands that vehicles travel
and can correct you r by
it to a road. is called map
Under elevated roads or similar structures
When driving among high buildings
When driving through a dense forest or tall trees
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