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捷克布拉格探矿研究所发明用24×36毫米(135)象幅的照象机进行金属矿及煤矿的地下采场的测量,地下采场的尺寸不大于10×10×10米,测量误差不大于10—20厘米。这是一种立体摄影系统,三脚架上固定有水平的金属横杆,象机可以滑动至横杆的两端,摄影基线长0.5米。象机可以用
The Prague Prospecting Institute of the Czech Republic invented the measurement of underground stopes for metal mines and coal mines using 24 × 36 mm (135) image cameras. The size of underground stopes is not more than 10 × 10 × 10 meters and the measurement error is not greater than 10-20 cm. This is a stereoscopic photography system. The tripod is fixed with a horizontal metal crossbar. The camera slides to both ends of the crossbar, and the photographic baseline is 0.5m long. Camera can be used