Abstract: With the rapid development of UAV equipment and computer-based digital image processing technology, UAV is more and more widely used in surveying and mapping industry. Especially in the current new form of natural resources development, the demand for three-dimensional “one map” is more and more urgent. UAV oblique photogrammetry technology has developed rapidly because of its convenience, flexibility and simple operation. But the UAV data generally has the problem of low elevation accuracy, and a large number of control points are needed to improve the accuracy. However, the existing specifications for field work of low-altitude digital aerophotogrammetry can not meet the requirements of UAV operation. Therefore, on the basis of considering the efficiency and the accuracy of the results, this paper discusses the influence of different image control layout schemes on the three dimensional accuracy of the UAV oblique photography remote sensing system and the results of the three-dimensional real scene model, and conducts relevant tests and accuracy analysis.

Key words: oblique photography, image control points, accuracy, UAV