DigiWalker User Manual P350 P550

8 Glossary
The manual may contain many technical terms. Please look below for an explanation
if you are unfamiliar with some of them.
¾ 2D/3D GPS reception: The GPS receiver uses satellite signals to calculate its
(your) position. Depending on the current positions of the ever-moving
satellites in the sky, and the objects in your environment, the signal that your
GPS device receives may be weaker or stronger. Your GPS needs strong
signal from at least four satellites to give a three dimensional position including
elevation. If fewer satellites are available, it may still be possible to calculate
the position but the accuracy will be lower and the GPS device will not
calculate elevation. This is called 2D reception. Mio Map shows the quality of
reception on the GPS Data screen (4.4.3) and both map screens (4.3.9). Note
that 2D and 3D GPS receptions have nothing to do with the 2D and 3D display
modes of the map. That is a way of representing the map on the screen
independently from the GPS reception.
¾ Accuracy: The difference between your real position and the one given by the
GPS device is affected by several different factors. The GPS is capable of
providing a guess of its current error based on the number of satellites it can
receive a signal from, and their position in the sky. This information is shown in
Mio Map on the GPS Data screen (4.4). Lower numbers indicate better
accuracy, where 1.0 is near-perfection. Use it as a general reference only.
Note that several other factors affect the real accuracy, some of which the
GPS is incapable of estimating (e.g. signal delay in the ionosphere, reflecting
objects near the GPS device, etc.).
¾ Active route: A route is an itinerary planned to reach your chosen
destinations. A route is active when it is used for navigation. Mio Map has only
one route at a time, and it is always active until you delete it, reach the final
destination or exit Mio Map. When there is more than one destination to reach,
the route is cut into different legs (from one via point to another). Only one of
these legs can be active at one particular time (4.2.11.3). The rest of them are
unused, and inactive.
¾ Automatic route planning (Autorouting): You only need to set up your
destination, and based on its map, the software will automatically figure out
which roads you need to take, and the turns you need to make to get there.
Mio Map will let you select multiple destinations, and customise some
important routing parameters (6.3).
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