Anais do XIX Simpósio Brasileiro de Sensoriamento Remoto

Gravitational mass movements like landslides are natural destructive processes that can cause enormous losses. Although crucial, identification and monitoring of such areas is time consuming and costly. New technologies such as laser scanning, unmanned aerial vehicles (UAV) and Structure-from-Motion -- Multi-View Stereo (SfM-MVS) photogrammetry provides an alternative to conventional mapping methods. A hill with a landslide located in the city of Cunha - SP was surveyed by terrestrial laser scanner (TLS) and UAV-based SfM-MVS. The cloud-to cloud distance was calculated. SfM-MVS point cloud covers a larger area and point distribution is more homogeneous while TLS points have an uneven distribution. Small distances were predominant in the vicinity of the landslide and greater differences only occurred on the scene edges. We conclude that both TLS and UAV SfM-MVS are suitable for landslide investigation according to terrain conditions and other visible limitation factors.