Patent ID: 8965194
Filing Date: 2015-02-24
Classification: G01S,G03B

Abstract:
1. A positional information recorder, comprising: a receiver configured to receive a wireless signal; an operation section configured to indicate a sign for recording positioning information; a positional information calculator configured to measure a geographical position based on the wireless signal and calculate positioning information according to the geographical position; a positioning information recorder configured to record the calculated positioning information; an acceleration detector configured to detect a movement direction and a movement amount; an inclination specifier configured to specify an inclination of the acceleration detector; a movement locus information calculator configured to calculate displacement information including a moving distance and a direction from a standard position; a relative positional information recorder configured to calculate, for each of a plurality of points, relative positional information according to a relative position from the standard position by the displacement information upon determination that the calculated positioning information is not obtained, and record the calculated relative positional information for each of the plurality of points associated with information according to the sign; and a positional information convertor configured to, upon determination that the calculated positioning information is obtained, convert the relative positional information of the plurality of points previously recorded in the relative positional information recorder into the positioning information, the conversion from the relative positional information into the positioning information performed in order from a latest calculated relative positional information in which the calculated positioning information was obtained to an earlier calculated relative positional information in which the calculated positioning information was not obtained.