| 摘要 |
PROBLEM TO BE SOLVED: To obtain a computation system by which the change point of a soil-layer line can be input precisely and easily. SOLUTION: By operating a digitizer 70, the soil-layer line on the lower side of every soil layer in the bedrock section, the boundary line of a regions to be noticed and the position of a change point on a ground-surface line are input. A soil-layer-line acquisition means 54 generates data expressing the position of the change point on the basis of the output signal of the digitizer 70. An area computation means 56 computes, on the basis of the data generated by the soil-layer-line acquisition means 54, the cross section of a soil layer using every soil-layer line as a boundary on the lower side for every soil-layer line within the range of a section region which is surrounded by the boundary line and by the ground-surface line. In addition, and operator operates a mouse 72 so as to designate a plurality of soil-layer lines corresponding to the soil layer of the same soil quality. On the basis of a signal which is output with the mouse 72 at this time, a soil-layer-line designation means 68 outputs discrimination information which indicates the plurality of soil-layer lines corresponding to the soil layer of the same soil quality. An area addition means 58 adds the cross section of the soil layer corresponding to the plurality of soil layers indicated by the discrimination information. |
