Forest degradation is a gradual process through which the forest’s biomass declines, the species composition and vertical complexity change and the soil physico-chemical properties degrade. Evaluating forest degradation is challenging, as it needs measurable indicators, in order to compare different areas with the best condition forest. The UAV-SfM technological package, combining drone’s imagery and algorithms, offers the opportunity to model forests in three dimensions and to derive ecological indicators describing forest state. The Dry Chaco is a subtropical broadleaf dry forest ecosystem having a long history of disturbances and human exploitation. A sample of 54 plots of forest with different degradation histories were surveyed in this region in order to study the degradation state. During the seminar we will discuss to what extent information on forest degradation can be derived from UAV-SfM methods.