DRAWING COORDINATES SYSTEM AND SCALE SETTING METHOD.

摘要

The method setting coordinates system (XD-YD') of graphics depicted on a drawing (DRW) on a tablet surface (8c) and setting a scale. The coordinates values in a tablet coordinate system (XT-YT) are inputted by identifying two points (P1, P2) whose coordinates values are known in the drawing coordinates: system. The distances between the individual two points in the tablet coordinates system and in the drawing coordinates system are calculated by use of the coordinates values. The known coordinate values and the scale S of the graphics is determined on the basis of a ratio of one distance to another in either of these coordinates systems. The drawing coordinates system (XD-YD) is set on the tablet surface on the basis of the scale S and the coordinates values in each coordinate system.