1. A system for determining the three dimensional shape of an object, comprising: a first measuring device for measuring a first distance and direction from a fixed first observation point to a first group of measurement points on the object, thereby obtaining first measurement results; a second measuring device for measuring a second distance and direction from a movable second observation point to a second group of measurement points on the object, thereby obtaining second measurement results, wherein at least one point among said second group of measurement points is a common measurement point, the common measurement point being the same measurement point as at least one point among the first group of measurement points, said second group of measurement points including at least one measurement point not included in the first group of measurement points; a computer for: (i) calculating a traveling velocity vector of the second observation point from the measurement results concerning the common measurement point made by the first and second measuring devices, (ii) correcting the second measurement results based upon said traveling velocity vector, and (iii) calculating the three dimensional coordinates of the measurement points of the first group and the second group of measurement points; and a display that displays an image of the object based upon the three dimensional coordinates.