Sony XDCA-FX9 Extension Unit for PXW-FX9 Camera - Manual (Page 129)

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current location when the camcorder receives
radio signals from 3 or more GPS satellites. The
triangulating error allowed by the GPS satellites
is about 10 m (33 feet). Depending on the
environment of the location, the triangulating
error can be greater. In this case, your actual
location may not match the location on the map
based on the GPS information. Meanwhile, the
GPS satellites are controlled by the United
States Department of Defense, and the degree of
accuracy may be changed intentionally.
• Error during the triangulating process
The camcorder acquires location information
periodically during triangulating.
On the restriction of use of GPS
Use GPS in accordance with the regulations of the
situation, the countries/regions of use.
On the geographic coordinate system
The “WGS-84” geographic coordinate system is
used.