Amapá is officially monitored by PRODES, led by the Federal Government , which has performed satellite monitoring of deforestation in the Legal Amazon since 1988.The monitoring is conducted by the National Institute of Space Research (INPE). PRODES use of Landsat satellite images class (20 to 30 meters spatial resolution and revisit rate of 16 days) in an effort to minimize the problem of cloud cover and ensure consistency.
SEMA-AP has assessed information on deforestation since 2002 in an effort to estimate the quantity and spatial distribution of deforestation within the state.The study used images from Landsat obtained free of charge through the INPE website. Because SEMA uses the same images as PRODES , similar limitation with respect to the presence of clouds were faced. However, images from throughout the year were stitched together to reduce the presence of clouds, allowing for an improved assessment as PRODES is typically limited to images taken during August.Because of this, the biannual rates observed by SEMA used the best available imagery over the period, although the rigorous mathematical methods employed by Prodes to determine the annual rate were not used. SEMA performed a manual vectorization of deforestation polygons and also maximized the parameters of original imagery allowing the smallest mapped area to be detected at approximately 0.1 ha. By comparison, PRODES does automatic classification by adopting the parameter of 16 pixels of 60x60 m to determine the minimum area to be mapped (5.76 ha). Both SEMA and INPE did not validate the data with field work and not identify drivers of deforestation in the state. There is also no differentiation between legal and illegal deforestation in the research by PRODES and SEMA.
Amápá has completed one technical study in partnership with EMBRAPA and INPA, which shows that the total carbon stock for the trees is 182.10 + 6.02 t / ha C-1, an average higher than in others regions of the Amazon.
Rio Branco Declaration based on national FREL