Mio MIOMAP C220 - Manual (Page 84)

Automatic day/night colours: Based on the time and position given by the GPS
device, MioMap is able to calculate when the sun rises and sets at your current
location on this particular day. Using that information MioMap can change between
the day and the night colour schemes a few minutes before sunrise and a few
minutes after sunset (Page 70). As additional information to help your orientation, the
sun is shown in the sky when you display the map in 3D mode with a low viewing
angle, and the sun is near the horizon.
Elevation: When the GPS receiver can see at least four GPS satellites, it can
determine its current position in three dimensions. In this case the elevation is
calculated together with the latitude/longitude position. Note that some older GPS
units may provide incorrect elevation data because they use a simple ellipsoidal
earth model rather than a database that contains local sea levels. You should also
be aware that the elevation value is generally less accurate (by at least a factor of 2)
than the horizontal position. See also 2D/3D GPS Reception.
ETA (Estimated Time of Arrival): A frequently used expression in navigation. It
represents the time when you will reach your destination based upon calculations
using the remaining part of the route and available information of the roads used.
This estimation can only be used as a general reference. It will not be able to take
into account your future speed or the traffic delays. In MioMap this value is shown as
‘Estimated Arrival’ on the Route Information screen (Page 37).
ETE (Estimated Time Enroute): Another frequently used expression in navigation.
It represents the time needed to reach your destination based upon calculations
using the remaining part of the route and available information of the roads used.
This estimation can be used only as a general reference. It will not be able to take
into account your future speed or the traffic delays. In MioMap this value is shown as
‘Time left’ on the Route Information screen (Page 37).
GPS: Abbreviation of Global Positioning System. This system is operated by the
DoD (the Department of Defense of the Unites States Government). It consists of 24
satellites orbiting Earth, and several ground stations to keep the satellites in sync. To
calculate your position, your GPS device uses the signals received from those GPS
satellites that are currently visible at your location. You can use this service free of
charge.
Lock-on-Road: This function of MioMap will always keep the green arrow
representing your actual position on the nearest road. This automatic feature is
necessary as the position given by the GPS receiver is not perfectly accurate. Under
normal circumstances Lock-on-Road will eliminate the occasional position error. If
the corridor of error is too large, your position may be shown over a different street
on the map. You can only avoid that by using good quality GPS equipment
positioned so that it has a direct view to as large a portion of the sky as possible.
Lock-on-Road is always active in MioMap. See also Page 19.
Lock-to-Position: When GPS position is available, MioMap will automatically keep
moving the map to always have the green arrow, representing your actual position,
on the screen. You can move the map to lose this position. Then the Follow button
appears on the screen. Tapping it will re-enable Lock-to-Position. See also Page 26.