Application of digital close-range photogrammetry to the deformation-observing for buildings

Abstract：Traditional surveying method has lots of disadvantages, such as great workload, low efficiency, high cost and low precision. This paper presents a surveying method of close-range photogrammetry based on non-metric digital camera. The surveying method calculates objects, spatial 3-D (dimension) coordinates by direct linear transformation (DLT) , and the method is analyzed by a real example of deformation monitoring of buildings. The paper concludes that the method can get high precision and measure building deformation effectively.

Keyword：close-range photogrammetry; deformation-observing; direct linear transformation;