SAT4EST is a system and service supporting forest management based on satellite Earth observation techniques. The SAT4EST system consists of the following components: satellite (data collection and processing), ground-based (access to spatial data, i.e., UPUL, EGiB), and mapping for data visualization and sharing with users. SAT4EST is the result of work carried out as part of the pilot project: SAT4EST – Earth observation based service supporting local administration in non-state forest management, funded by the European Space Agency (ESA). The SAT4EST system was developed by a consortium consisting of TaxusIT Sp. z.o.o. and the Institute of Geodesy and Cartography.