| 摘要 |
PROBLEM TO BE SOLVED: To quickly and easily draw a plan by setting a coordinate axis of an axonometric projection plan without using an angle setting tool. SOLUTION: A position 40 mm inside from the end of a longer side of an A4-size sheet is folded to form a rectangle 2 and folds 3, 4 are formed on two diagonal lines of the rectangle 2. A point 5 where the folds 3, 4 intersect is made a center of a coordinate and further, lines 6, 7 are drawn on the folds 3, 4 which form an obtuse angle in the upper part of the plan from the point 5. In addition, three coordinate axes (X axis, Y axis and Z axis) are set by drawing a parallel line 8 with the shorter side of the sheet from the point 5 toward the lower part of the plan and the plan is drawn by an isometric projection based on the coordinate axes.
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