ABSTRACT
Like industrial production, there must be some procedures or methodology for quality management and control in digital terrain modeling.
7.1 QUALITY CONTROL: CONCEPTS AND STRATEGY
7.1.1 A Simple Strategy for Quality Control in Digital Terrain Modeling
The quality of DTM data is usually measured by the accuracy of position and height. However, updatedness (or currency) has also become an important issue. This importance can be illustrated by the generation of DTM from a pair of aerial photographs taken 10 years ago. Although the DTM is of great fidelity to the original terrain, the result may not necessarily be useful if there have been a lot of changes. In this context, it is assumed that the source materials used for digital terrain modeling are not out of date. Therefore, only accuracy is of concern in this chapter.
