Electronic devices and positional information obtaining method

An electronic device comprising:

• a sensor that measures air pressure;
• a processor that obtains altitudes at intervals of a first period based on the measured air pressure;
• a storage that stores altitude information on each of the obtained altitudes;
• a communication unit that sends the stored altitude information to an external device that performs positioning;
• and
• an operation receiver that receives an input operation from outside, wherein
• the processor:
• sends the altitude information on the altitudes obtained at intervals of the first period, at intervals of a second period that is longer than the first period;
• and
• obtains an altitude at a timing at which the operation receiver receives a predetermined command, and sends the altitude information on the altitude not at intervals of the second period.

A positional information obtaining method for an electronic device including:

• a receiver that receives radio waves from positioning satellites;
• and a communication unit that receives, from an external device, altitude information on each altitude obtained by the external device, the positional information obtaining method comprising:
• performing positioning at intervals of a first period based on the radio waves from the positioning satellites received by the receiver;
• from the external device, receiving the altitude information on altitudes obtained at intervals of the first period, at intervals of a second period that is longer than the first period, and individually receiving the altitude information on an altitude obtained not at intervals of the first period;
• in response to receiving the altitude information on the altitude obtained not at intervals of the first period, performing the positioning at a timing of receiving the altitude information on the altitude;
• and
• based on (i) obtainment timings of the altitudes in the external device received at intervals of the second period and (ii) an obtainment timing of the altitude in the external device received individually, correlating the altitudes of the altitude information received at intervals of the second period and the altitude of the altitude information received individually with positioning results of the positioning such that the obtainment timings correspond to positioning timings of the positioning results.