The tunnel present condition development view and its creation mannered

摘要

PROBLEM TO BE SOLVED: To provide a tunnel existing circumstance development having three- dimensional information.;SOLUTION: On this tunnel existing circumstance development A displayed on a medium such as paper or a display 16, a central line CL indicating the line shape of a tunnel 2, a plurality of surveying points P(i) determined along the central line CL of the tunnel 2 at predetermined intervals, and a line segment having a length corresponding to a cross-section circumferential length Di calculated on the basis of a cross-section measured at each surveying point P(i), and extended in the direction orthogonal to or approximately orthogonal to the central line CL, are indicated.;COPYRIGHT: (C)2004,JPO