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on this particular day. Using that informa-
tion Cydle can change between the day
and the night color schemes a few minutes
before sunrise and a few minutes after sun-
set. 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 dimens ions. In
this case the elevation is calculated togeth-
er with the latitude/longitude position. Note
that some older GPS units may provide in-
correct elevation data because th ey use a
simple ellipsoidal earth mode l rather than
a database that contains local sea level s.
You should also be aware that the elevation
value is generally less accurate (by at lea st
a factor of 2) than the horizontal position.
See also 2D/3D GPS Reception.
ETA (Estimated Time of Arri val): A fre-
quently used expression in navigation. It
represents the time when you will reach
your destination based upon calcula tions
using the remaining part of the route an d
available information of the roads used.
This estimatio n can only be use d as a gen-
eral reference. It will not be able to take
into account your future speed or the traf-
fi c delays. In Cydle this value is shown as
‘Estimated Arrival’ on the Route Informa-
tion screen.
ETE (Estimated Time En route): Another
frequently used expression in navigation. It
represents the time needed to reach your
destination based upon calculati ons using
the remaining part of the route and avail-
able information of the roads used. This
estimation can be used only as a general
referenc e. It will not be ab le to take into ac-
count your future speed or the traffi c de-
lays. In Cydle this value is shown as ‘Time
left’ on the Route Information screen.
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 kee p the satellites in
sync. To calculate your position, your GPS
device uses the signals received from t hose
GPS satellites that are currently visible a t
your location. You can use this service free
of charge.
Lock-on-Road: This function of Cydle will
always keep the blue(yellow when using
night colors) arrow representing you r actu-
al position on the nearest road. This au to-
matic feature is necessary as th e position
given by the GPS receiver is not perfectly
accurate. Under normal circumstances
Lock-on-Road will eliminate the occa-
sional 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. Normally Lock-on -Road is
always active in Cydle when GPS position
is available. However for pedestrian use it
can be permanently turned off in Advanc ed
settings.
Lock-to-Position: When GPS position
is available, Cydle will automatically keep
moving the map to always have the blue
(yellow at night) arrow, representing your
actual position, on the screen. You can
move the map to lose this position. Then
the Lock button appears on the scree n.
Tapping it will re-enable Lock-to-Position.
Map Orientation: Cydle is able to ro-
tate the map for your convenience. If you
choose Track-up mode, the map will be ro-
tated to look in the direction of your head-
Glossary