User manual

GB
236
6 Glossary
2D/3D GPS reception
The GPS receiver uses satellite signals to calculate its (your) position and needs at
least four signals to give a three-dimensional position, including
elevation. Because the
satellites are moving and because objects can block the signals, your GPS device might
not receive four signals. If three satellites are available, the receiver can calculate the
horizontal
GPS position but the accuracy is lower and the GPS device does not give
you
elevation data: only 2D reception is possible.
Active route
The currently navigated route. Whenever the destination is set, the route is active until
you delete it, reach your
destination or you quit the software. See also: Route.
City Centre
The city/town centre is not the geometric centre of the city/town but an arbitrary point
the map creators have chosen. In towns and villages, it is usually the most important
intersection; in larger cities, it is one of the important intersections.
Colour theme
The software comes with different colour themes for daytime or night use of the map
and menu screens. Themes are custom graphic settings and they can have different
colours for streets, blocks or surface waters in 2D and 3D modes, and they display
shades or shadows in different ways in 3D mode.
One daytime scheme and one night scheme is always selected for the map and for the
menus. the software uses them when it switches from day to night and back.