GEOGRAPHICAL INFORMATION PROCESSOR, GEOGRAPHICAL INFORMATION PROCESSING METHOD AND COMPUTER-READABLE MEDIUM

摘要

An accurately interpolated path is set to a path consisting of a geodesic line between two points on an ellipsoid of revolution that is projected on to a true sphere. A geographical information processor (100) has a storage device (2) and a computation unit (3). The storage device (2) has stored therein information that indicates two points on the ellipsoid of revolution. The computation unit (3) reads the information pertaining to the two points on the ellipsoid of revolution from the storage unit (2) and rotates a plane to which a path on a great circle linking the two points projected to the true sphere belongs by a prescribed amount around a line linking the start and end points on the true sphere and thereby minimizes the error of an interpolated path after rotation against the geodesic line projected to the true sphere.