AERIAL MARKING FOR AERIAL PHOTOGRAPHY SURVEY

摘要

PROBLEM TO BE SOLVED: To solve the problem wherein markings obtained by installing a square plate at the center of a spot reference point and painting the plate, while on its upper surface or radically installing plates in three or four ways using the reference point as center and painting the plates white on their upper surfaces are used as conventional aerial markings, and thus that an operator makes an error, in the course of targeting operation and the simplification and labor saving of the spot installing operation of the aerial markings are required.;SOLUTION: The marking is obtained by overlapping and sticking, onto a circular sheet, having an appropriate size, a smaller circular sheet on which a center position is indicated, and the upper inner side circular sheet is defined as being white or yellow, and the outer lower side sheet is defined as black or bark color so that the contour of the upper inner side circle can be photographed sharply. Since the center position of the aerial marking photographed is accurately calculated by gravity calculation, the error of an operator during targeting operation is eliminated. Further, by having the aerial signal in the sheet form prepared in advance, operation on site is simplified and saving labor.;COPYRIGHT: (C)2005,JPO&NCIPI