Forest management, as a component of the management of natural protected areas, has the mission to adopt the most effective measures in relation to climate change. The forest management activity is based on management plans drawn up for a period of 10 years, a period appreciated, until recently, to be sufficient for management plans to be considered up to date. Their updating is done with the data provided in field by the rangers through direct observations and measurements, but the accuracy of

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... these data is complemented by data obtained through modern technologies. Analyses of the distribution of forest vegetation, its composition and its evolution, both in time and in the area, and last but not least, the technical measures for implementing the most effective treatments for preserving its health, the optimal structure and biomass production is made using the latest technology, such as Free Open Source Software and GIS. Recent services provided free of charge by some remote sensing operators make it possible to adopt the most appropriate technical measures, real-time tracking of their implementation and expected results. This paper aims to bring to light some of the most useful free remote sensing services and how to use them.