An information processing method comprising the steps of: obtaining and storing by a first device a set of picture information in association with a plurality of corresponding first time information representing times of day at which said picture information are captured; obtaining and storing by a GPS device a set of measured positions in association with a plurality of corresponding second time information representing times of day at which said positions are measured, wherein a wake state and a sleep state of the GPS device are alternated, whereby the wake state is activated after a predetermined sleep time in which the GPS device is in the sleep state, a measured position is obtained and stored after activation of the wake state, and once the storing is performed, the sleep state is resumed, if the predetermined sleep time is zero, the GPS device continuously is in the wake state and obtains and stores measured positions at predetermined intervals, if no measured position can be obtained and stored, the GPS device remains in the wake state, until after a predetermined wake time or interval time, respectively, the sleep state is activated, upon operation of a mark button of the GPS device by a user an additional measured position at that time point is obtained and stored, and wherein if no measured position can be obtained and stored at the time of the user input, the most recently stored measured position is provided with updated second time information; and associating by a third device said picture information with said measured positions, after the steps of storing the set of picture information by the first device and of storing the set of measured positions by the GPS device, respectively, are completed, wherein in said associating step, a picture information is associated with a measured position of which the second time information matches the first time information, wherein if there is no match, the position for said picture information is estimated from two chronologically closest measured positions. obtaining and storing by a first device a set of picture information in association with a plurality of corresponding first time information representing times of day at which said picture information are captured; obtaining and storing by a GPS device a set of measured positions in association with a plurality of corresponding second time information representing times of day at which said positions are measured, wherein a wake state and a sleep state of the GPS device are alternated, whereby the wake state is activated after a predetermined sleep time in which the GPS device is in the sleep state, a measured position is obtained and stored after activation of the wake state, and once the storing is performed, the sleep state is resumed, if the predetermined sleep time is zero, the GPS device continuously is in the wake state and obtains and stores measured positions at predetermined intervals, if no measured position can be obtained and stored, the GPS device remains in the wake state, until after a predetermined wake time or interval time, respectively, the sleep state is activated, upon operation of a mark button of the GPS device by a user an additional measured position at that time point is obtained and stored, and wherein if no measured position can be obtained and stored at the time of the user input, the most recently stored measured position is provided with updated second time information; and associating by a third device said picture information with said measured positions, after the steps of storing the set of picture information by the first device and of storing the set of measured positions by the GPS device, respectively, are completed, in said associating step, a picture information is associated with a measured position of which the second time information matches the first time information, wherein if there is no match, the position for said picture information is estimated from two chronologically closest measured positions.