Canon EOS 7D Mark II Instruction Manual page 207

Since the digital compass uses geomagnetism for direction sensing, correct
directions may not be obtained or calibration may not be possible in the
following environments.
• In or near buildings (including office buildings, residences built using
reinforced concrete or masonry, and underground shopping malls),
vehicles (including cars, trains, planes, and boats), or metal structures
such as elevators
• Near metals (including steel desks and furnishings), permanent
magnets (including magnetic jewelry), or home electronics (including
televisions, computers, speakers, or mobile phones)
• Near high-voltage lines (including transmission towers), overhead
power lines (including those powering trains), or metal facilities
(including footbridges and guardrails)
• At high latitudes
Calibrating the Digital Compass
While you are using the GPS function, if the [Calibrate digital
compass] screen appears or if the direction indicated looks
questionable, calibrate the digital compass as follows. The digital
compass should be calibrated at the actual shooting location.
1
Using the Digital Compass
Select [Calibrate digital
compass].
Check that [Digital compass] is set
to [Enable].
Select [Calibrate digital compass],
then press <0>.
The camera will be ready for
calibration.
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