Abstract
The paper presents a photogrammetric system with a digital camera as a precise measuring tool for the monitoring of slope stabilities. The least squares solution with a pseudoinverse method, which has the advantage of the flexibility of measurement, is introduced by both of mathematic and geometric concepts to transform two dimensional digital image coordinates into three dimensional object space coordinates without the incorporation of control data. In the paper, experiments have been also conducted to quantitatively examine the accuracies and precision of this solution, and the results show that this measurement system has high potential applicability in deformation monitoring of a slope.
