Remotely piloted aircraft system (RPAS) platforms are able to optimize the process of acquiring aerial images and improve the quality of the products generated in terms of spatial and temporal resolution. The exponential advance of the use of RPAS platforms in forestry, especially from the year 2010, is noteworthy. In this review, we present the global state of the art of the development and applications of RPAS technology in forestry, structured from a systematic review. Our results reveal a trend towards the use of multirotor RPAS platforms compared with fixed-wing platforms and that sensors that register in the visible spectral range are still the most widely used. More recent research has shown applications geared especially for areas such as forest inventory, with many innovations based on the detection of individual trees. Special focus has also been given to new alternatives for pest and disease mapping and phenological phenomena that occur at short intervals, as well as the monitoring of fires and postharvest areas. Therefore, there is a great potential for the use of RPAS platforms in a wide range of forest applications, whether linked to the productive sector or to the conservation of biodiversity, with great advances for spatiotemporal forest monitoring and expectations of further progress for the coming years.

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As cadeias de valor que compõem a agricultura familiar constituem várias atividades econômicas relevantes para a economia brasileira. Dentre elas, destaca-se o setor fumageiro não só pelo aspecto econômico, mas também pela maior atenção para sustentabilidade do processo produtivo do tabaco, no qual é utilizado lenha para a secagem das folhas. O objetivo desse trabalho foi realizar um diagnóstico da produção e consumo madeireiro de produtores de tabaco na região sul do Brasil. A metodologia aplicada baseou-se no inventário das florestas dos produtores e informações de consumo de lenha no processo de secagem do tabaco de 7 regiões específicas do Rio Grande do Sul, Santa Catarina e Paraná. Foi estimado que a área de produção florestal familiar foi 116.009 ha e o consumo anual de lenha foi de 3.293.755 m³. Em todas as regiões os cenários de produção e consumo de lenha apresentou rendimento volumétrico sustentado. A produção florestal familiar garante a suficiência energética para a cadeia de valor do tabaco Virgínia no sul do Brasil. Palavras-chave: Eucalyptus; lenha para secagem do tabaco; sustentabilidade volumétrica.   Use of renewable energy in a family farm production chain   ABSTRACT: The value chains that make up family farming constitute several economic activities that are relevant to the Brazilian economy. Among them, the tobacco sector stands out, not only because of the economic aspect, but also because of the greater attention paid to the sustainability of the tobacco production process, in which firewood is used to dry the leaves. The objective of this work was to carry out a diagnosis of the production and consumption of wood by tobacco producers in the southern region of Brazil. The applied methodology was based on an inventory of the producers' forests and information on firewood consumption in the tobacco drying process in 7 specific regions of Rio Grande do Sul, Santa Catarina and Paraná. It was estimated that the family forest production area was 116,009 ha and the annual firewood consumption was 3,293,755 m³. In all regions, firewood production and consumption scenarios presented sustained volumetric yield. Family forest production ensures energy sufficiency for the Virginia tobacco value chain in southern Brazil. Keywords: Eucalyptus; firewood for drying tobacco volumetric sustainability.

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