Patent ID: 8224030

Claim:
A position measuring method for measuring a moving image pickup position and for measuring an object of image pickup from the image pickup position, wherein a method of intersection and a method of resection are alternately and repeatedly carried out, said method of intersection is used to continuously take digital images, to generate tracking point in the image, to perform tracking on moving image and to measure coordinates of said tracking point from coordinates of the image pickup position used as a known point by calculation, said method of resection is used to measure the image pickup position after moving from coordinates of the tracking point obtained by calculation, comprising a step of measuring actually a distance to an object of image pickup by laser surveying in parallel to image pickup of the digital image, a step of comparing coordinates of said tracking point obtained by calculation with the distance obtained by actual measurement, and a step of acquiring a calculating coordinate as coordinate value of the tracking point in case said calculating coordinate obtained by calculation is within a predetermined limit of errors to the actually measured distance.