Electronic apparatus

An electronic apparatus comprising:

• a main body;
• a first-axis magnetic sensor fixedly disposed within the main body and outputting a value corresponding to a component of an external magnetic field along a direction of a first axis of the main body;
• a second-axis magnetic sensor fixedly disposed within the main body and outputting a value corresponding to a component of the external magnetic field along a direction of a second axis of the main body, the second axis intersecting the first axis at a predetermined angle;
• and
• azimuth-inclination angle determination means for determining an azimuth of a third axis of the main body and an inclination angle of the third axis relative to a reference plane on the basis of values actually output from the first-axis and second-axis magnetic sensors and with reference to a conversion table defining relations between values output from the first-axis and second-axis magnetic sensors and azimuth of the third axis and between the values and inclination angle of the third axis.

An electronic apparatus comprising:

• a main body;
• a first-axis magnetic sensor fixedly disposed within the main body and outputting a value corresponding to a component of an external magnetic field along a direction of a first axis of the main body;
• a second-axis magnetic sensor fixedly disposed within the main body and outputting a value corresponding to a component of the external magnetic field along a direction of a second axis of the main body, the second axis intersecting the first axis at a predetermined angle;
• position data obtaining means for obtaining position data indicating the position of the main body;
• communication means for communicating with a center;
• conversion table obtaining means for transmitting the obtained position data to the center via the communication means and for receiving table values of a first conversion table from the center when the center determines that the main body is present within an inclination correctable area in which the geomagnetic field is known, and receiving table values of a second conversion table or a signal from the center when the center determines that the main body is not present within the inclination correctable area, the first conversion table defining relations between values output from the first-axis and second-axis magnetic sensors and an azimuth of a third axis of the main body and between the values and an inclination angle of the third axis relative to a reference plane, the second conversion table defining a relation between values output from the first-axis and second-axis magnetic sensors and azimuth of the third axis on the assumption that the inclination angle of the third axis relative to the reference plane is a predetermined constant angle, the signal indicating to the effect that the inclination angle must be assumed to be the predetermined constant angle;
• and
• azimuth-inclination angle determination means for determining the azimuth and inclination angle of the third axis on the basis of values actually output from the first-axis and second-axis magnetic sensors and with reference to the obtained table values or the signal indicating to the effect that the inclination angle must be assumed to be the predetermined constant angle.