Further Information
Regarding Vehicle Position Detection
Correction Using Map Matching
Regarding the Accuracy of the Current Position
and Route Navigation
Map matching is a method of comparing information on the current
position acquired by GPS and so on, with the road driven up to that
point, and correcting the current position based on the most likely
road.
This unit uses information on the current position combined with
independent navigation and satellite navigation and matches it to the
shape of the road to create the correction.
However, as it cannot avoid the error margins at the current position,
the current position may shift away from the actual position even when
correcting using map matching.
Also, the vehicle marker may shift if the map data and the shape of the
road being driven on differ.
As in the following images, an accurate display of the current position
or route navigation may not be provided, however this is not an
indication of a malfunction in the unit, but is due to road conditions or
driving conditions.
• Shows the current position on roads • Shows the current position on the
running in parallel.
other road when there is a narrow
fork in the road.
Actual Vehicle Swept Path
Vehicle swept path acquired from each sensor
Corrected using map matching on the screen
NOTE
Because it takes a short time for operations to stabilize just after turning on the
unit, the vehicle mark may not immediately match the vehicle as it moves. After
driving for a while, operations stabilize, and the marker should match the actual
driving position.
• Shows the current position on the
• Shows the current position when
road ahead or behind when turning
traveling up a steep hill.
right or left.
Navigation 175