The Detection of Active Sinkholes by Airborne Differential LiDAR DEMs and InSAR Cloud Computing Tools

InSAR (Interferometric Synthetic Aperture Radar) cloud computing and the subtraction of LiDAR (Light Detection Ranging) DEMs (Digital Elevation Models) are innovative approaches to detect subsidence in karst areas. allows for analyzing C-band Envisat Sentinel S1 SAR images through web platforms produce displacement maps Earth’s surface an easy manner. The serial results same product but with a different level accuracy precision than maps. Here, we analyze capability these products active sinkholes mantled evaporite Ebro Valley (NE Spain). We found that produced open access, high-resolution airborne was up four times higher generated by Geohazard Exploitation Platform (GEP). Differential provide accurate information about location, sectors, maximum rate growing trend most rapid damaging sinkholes. Unfortunately, artifacts detection limit established at −4 cm/yr entailed important limitations precise mapping sinkhole edges slow-moving small collapses. Although provided GEP show worse performance when identifying sinkholes, some cases they can serve as complementary technique overcome urban