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The antenna of the GPS module is
located at the top of the module, and
it should face upwards. Some car
windshields and windows may contain
metal, which may block or weaken the
satellite signals.
If you stand still, GPS cannot detect
which way you are facing, because it
determines your direction on the basis
of your movement.
Almost all digital cartography is
inaccurate and incomplete to some
extent. Never rely solely on the
cartography provided for use with the
GPS application.
The use of the GPS module requires
your mobile phone to be switched on.
Do not switch on your mobile phone
where it may cause interference or
danger.
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. The
GPS module should only be used
outdoors to allow reception of GPS
signals.
GPS should only be used as a navigation
aid. It should not be used for precise
location measurement and you should
never rely solely on location data from
the GPS module for positioning or
navigation.