Using the data declared by the farmers in the Brazilian Rural Environmental Registry (CAR) maintained by the Brazilian Forest System, this project intends to analyze areas destined for the preservation of native vegetation in rural properties, and legally assigned areas. This analysis is focused on a delimited territory (the State of Rondônia) and performed at increasing, successive levels, city > microregion > and the state of Rondônia, as requested by the Soybean Producers Association in Rondônia (Associação dos produtores de soja do Estado de Rondônia, Aprosoja-RO, in Portuguese). Scientific knowledge about the use and occupation of land is essential to qualify and quantify the contributions of farms to the preservation of native vegetation, biodiversity, and to the environment as a whole in Brazil.