Nokia N97 - Manual (Page 67)

Almost all digital cartography is inaccurate and incomplete
to some extent. Never rely solely on the cartography that you
download for use in this device.
Content such as satellite images, guides, weather and traffic
information and related services are generated by third
parties independent of Nokia. The content may be inaccurate
and incomplete to some extent and is subject to availability.
Never rely solely on the aforementioned content and related
services.
About positioning methods
Maps displays your location on the map using GPS, A-GPS, Wi-
Fi, or cell ID based positioning.
The Global Positioning System (GPS) is a satellite-based
navigation system used for calculating your location. Assisted
GPS (A-GPS) is a network service that sends you GPS data,
improving the speed and accuracy of the positioning.
Wi-Fi positioning improves position accuracy when GPS
signals are not available, especially when you are indoors or
between tall buildings.
With cell ID based positioning, the position is determined
through the antenna tower your cellular phone is currently
connected to.
Depending on the available positioning method, the accuracy
of positioning may vary from a few meters to several
kilometers.
When you use Maps for the first time, you are prompted to
define the internet access point to use to download map
information, use A-GPS, or connect to a Wi-Fi.
The Global Positioning System (GPS) is operated by the
government of the United States, which is solely responsible
for its accuracy and maintenance. The accuracy of location
data can be affected by adjustments to GPS satellites made
by the United States government and is subject to change
with the United States Department of Defense civil GPS policy
and the Federal Radionavigation Plan. Accuracy can also be
affected by poor satellite geometry. Availability and quality
of GPS signals may be affected by your location, buildings,
natural obstacles, and weather conditions. GPS signals may
not be available inside buildings or underground and may be
impaired by materials such as concrete and metal.
GPS should not be used for precise location measurement,
and you should never rely solely on location data from the
GPS receiver and cellular radio networks for positioning or
navigation.
The trip meter has limited accuracy, and rounding errors may
occur. Accuracy can also be affected by availability and quality
of GPS signals.
Note: Using Wi-Fi may be restricted in some countries. For
example, in France, you are only allowed to use Wi-Fi indoors.
For more information, contact your local authorities.
View your location and the map
See your current location on the map, and browse maps of
different cities and countries.
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