UNSUPERVISED EXTRACTION OF DRAINAGE NETWORK FROM DIGITAL ELEVATION DATA: A SELF-ADAPTIVE APPROACH

摘要

In this study, the problem of unsupervised extraction of drainage network from elevation data is addressed. A self-adaptive system and its application to the problem are described. The system incorporates variable thresholding in conjunction with an adaptive algorithm to extract the drainage network through an iterative parameter adjusting process. The algorithm and its application to DEM data are illustrated.