Remote sensing is acknowledged as the best solution for forest monitoring of such vast areas. INPE is a research unit of the Brazilian Ministry of Science and Technology, whose main goals are fostering scientific research and technological applications and qualifying personnel in the fields of space and atmospheric sciences, space engineering, and space technology. It developed the PRODES project for a detailed annual assessment of deforestation. PRODES, one of the actions of the Science and Technology Ministry (MCT), in the Plan of Prevention and the Amazon Deforestation Control (PPCDAM), has been recognized as an essential contribution for the PPCDAM goals as well as for transparency in publishing the information about the Legal Amazon. INPE makes PRODES information freely available through: www.obt.inpe.br/prodes Making use of high resolution optical satellite sensors, PRODES enables the capture of all deforestation bigger than 6.26 hectares.