抄録
A straight line is given on the ground plane, and many straight lines, parallel to one another and at constant intervals, are on the same plane. Intersection points of them are at constant intervals. Perspective projection of the given straight line appears as total perspective. Perspective projection of these many straight lines becomes to a group of straight lines, each line passes a vanishing point on HL and their intervals in horizontal direction are constant. Then we get axometric scale of the given straight line from intersection points of the total perspective and the group of straight lines. We get also axometric scales both of a straight line parallel to the given straight line and of one in a differrent direction from the same many straight lines. If we use a drawing paper, on which HL and such a group of straight lines are printed, we can easily draw one or two vanishing point perspective images.
