When the GPS reception is poor (e.g. driving in an urban environment with a low
sensitivity GPS), occasional wandering (called position fluctuation) of the calculated
GPS position is likely. Although HP iPAQ Trip Guide employs a sophisticated Lock-on-
Road system that will mostly suppress these position errors by aligning your position to
the recommended route and the road network of the map, sometimes the errors are
too large to correct.
To reduce the effect of large errors, you can increase the recalculation tolerance two
ways.
Off-route sensitivity
This is a range of relative values from 0 to 10, telling HP iPAQ Trip Guide how far the
GPS position should be from the recommended route before the program decides to
recalculate. Lower values make HP iPAQ Trip Guide insensitive to position errors;
higher values will result in quicker reactions.
Recalculation delay
This is a setting that helps suppress the effects of position fluctuation. With a few
seconds delay in recalculation even large position jumps can be survived without a
need for route recalculation.
U-turn penalty
You can fine-tune the way HP iPAQ Trip Guide takes U-turns into account when
planning a route. You can tell HP iPAQ Trip Guide how much extra distance you
would travel to avoid a U-turn.
Parameters (Page 88).
Cross-border planning
By default HP iPAQ Trip Guide plans routes using the border crossing points.
However, if you live near the border, you can disable border crossing with this switch
to remain within one country.
98
Note:
This value is taken into account only if U-turns are enabled in Route
