Developing Efficient Procedures for Automated Sinkhole Extraction from Lidar DEMs

• DOI: 10.14358/pers.79.6.545
• Publication Date: 2013-10-22T01:46:04Z
• Authors: Xin Miao; Xiaomin Qiu; Shuo-Sheng Wu; Jun Luo; Douglas R. Gouzie; Hongjie Xie
• Keywords: Hierarchal Watershed Segmentation (HWS); Sinkhole Detection; Karst Areas; Adaptive Wiener Filter (AWF); 01 natural sciences; 0105 earth and related environmental sciences

Sinkhole detection in karst areas is usually difficult through remote sensing image interpretation. We present an efficient approach to extract mature sinkholes from lidar DEM. First, an adaptive Wiener filter (AWF) and hierarchical watershed segmentation (HWs) are applied to identify all local depression or potential sinkholes. Second, a hole-filling algorithm is applied to the potential sinkholes, and nine spatial features are extracted. Finally, the random forest classifier is used to select true sinkholes from all potential sinkholes. Our results show that this approach is efficient for detecting mature sinkholes from lidar data, and it can be used for risk assessment and hazard preparedness in karst areas.