From the Landsat mosaics, the classifications that result in land cover and land use maps are carried out for each year. Within the logic proposed by MapBiomas the maps will be updated every time there is an improvement in the classification algorithms. The classification methodology is dynamic and procedural, with the purpose of improving the classification of each typology.
Important: when composing a single mosaic or calculating statistics on maps it should be noted that:
For area calculation, it is necessary to use an appropriate metric projection.
Until Collection 4.0, the biome limits were adopted by the original scale project published by the IBGE from 1: 5,000,000 to 1: 1,000,000 from the territorial boundaries maps of Brazil 1:250,000 (IBGE) and phytophysiognomies 1: 1,000,000, also of IBGE. Since Collection 4.1. the new limits of biomes on 1:250.000 scale produced by IBGE (2020) were adopted. The boundary shapefile is available for download along with reference maps.
The RGB color palette for each legend class is available in the file, as well as for use in ArcMap or QGIS.
5. Download by state, biome, municipality and any other desired geometry using Toolkits prepared in Google Earth Engine (GEE). Access the tutorial video to learn how to use the toolkit. Instructions are also available on Github. The following data are currently available:
The transition maps have codes calculated by joining the first and second year codes, according to the formula below:
(year1 x 100) + year2
This means:
303 = forest that remained forest
315 = forest that has been converted to pasture
1515 = pasture that remained pasture
1524 = pasture that has been converted to urban infrastructure
Mosaic Quality Caption
Obs. All data are downloaded with a .CSV table (comma separated text) with the calculated areas. This script is an example of how to perform the Area Calculation in the GHG.
