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
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.
The coordinates in the GPS are expressed
using the international WGS-84
coordinate system. The availability of the
coordinates may vary by region.