The land cover and land use classifications of MapBiomas Amazonía Collection 2 are based on LANDSAT mosaics. A mosaic has been produced for each 1:250,000 chart, for each year evaluated (1985-2018). Each mosaic is produced by the spatial integration of different LANDSAT images present in each chart and by a pixel-by-pixel temporal integration. The time intervals are defined according to a strategy to improve the classification results .
Annual mosaics contain up to 81 components per pixel, which includes 8 spectral bands plus various fraction metrics and spectral indexes.
You can access Collection 2’s annual mosaics directly in Google Earth Engine through the following tool*: https://code.earthengine.google.com/2aed0a40fad7417aa922003c1be96dd4
* To use this tool you must have an account in the Google Earth Engine (free).