OVERVIEW

GET TO KNOW THE STEPS OF THE MAPBIOMAS ALERT METHODOLOGY

Below you will find the main characteristics, the way of organizing the work and the overview of the MapBiomas Alert method to validate and refine, with high resolution images, deforestation alerts in Brazilian biomes.

GENERAL CHARACTERISTICS

All alerts and respective deforestation reports are produced from the analysis and supervised classification of PlanetScope satellite images of 3-5 m resolution and daily frequency.

The entire process is done with extensive use of machine learning algorithms (machine learning) through the Google Earth Engine platform that offers immense processing capacity in the cloud.

The work is organized in cells (tiles) of 5 x 5 km. The definition of cells/tiles to be analyzed is based on deforestation alerts generated by the systems of the responsible institutions according to the table below:


Alert system

Provider institution

Covered biomes

DETER

INPE

Amazon and Cerrado

SAD

IMAZON

Amazon

SAD Caatinga

UEFS e Geodatin

Caatinga

SAD Atlantic forest

Arcplan, SOS Atlantic forest

Atlantic forest, Wetland

SipamSAR

Censipam

Amazon

Sirad X

ISA, Network Xingu +

Amazon, Xingu basin

GLAD

University os Maryland

Pampa, Wtland and Atlantic Forest

Atlas of the Atlantic Forest

SOS Mata Atlântica Foundation

Atlantic Forest

PRODES

INPE

Amazon and Cerrado

HOW WE ORGANIZE

To carry out the validation and refinement of alerts, teams of programmers, remote sensing specialists and conservation and land use specialists are organized into teams for each biome, in addition to the technology and systems support team.

 

OVERVIEW OF THE METHOD

The diagram below illustrates the main steps in the process of validating and refining deforestation alerts in Brazilian biomes.

SOURCE OF CROSS DATA

Once validated and refined with high resolution images, the alerts are crossed with land and inspection information, such as indigenous territories, conservation units, settlements, Rural Environmental Registry (CAR) areas, including Permanent Preservation Areas (APP) and Legal Reserve (RL), in addition to embargo areas, suppression authorizations and the Sinaflor do Ibama forest management plan. Alerts are also located in geographic limits such as municipalities, states, biomes and watershed.

In the MapBiomas Alerta Platform, alerts can be visualized in different basemaps (backgrounds), such as Google Earth images (without associated date), Google Maps 2D, monthly mosaics of Planet images and the most current collection of annual maps of MapBiomas Brazil land use and coverage.

This information qualifies the alerts and complements the reports with relevant information for the user bodies.


Layer Year Description Reference Site to download
APP 2021 Permanent Preservation Areas SFB, 2021 https://sistemas.florestal.gov.br/geoserver/ows
Countries 2018 Map of Brazil (political boundary) IBGE, 2018 ftp://geoftp.ibge.gov.br/organizacao_do_territorio/malhas_territoriais/malhas_municipais/municipio_2015/Brasil/BR/
States 2018 Map of the States of Brazil IBGE, 2018 ftp://geoftp.ibge.gov.br/organizacao_do_territorio/malhas_territoriais/malhas_municipais/municipio_2015/Brasil/BR/
Municipalities 2018 Map of the Municipalities of Brazil IBGE, 2018 ftp://geoftp.ibge.gov.br/organizacao_do_territorio/malhas_territoriais/malhas_municipais/municipio_2015/Brasil/BR/
Biomes 2019 Map of Brazilian biomes 1: 250,000 (IBGE, 2020) MapBiomas,2016 https:https://drive.google.com/open?id=0Byp5eRWoQ-PkWUpXNHRGMTdkcTg
Hydrographic Regions   Map of watersheds level 1, scale 1: 1,000,000 ANA http://dadosabertos.ana.gov.br/datasets?group_ids=084346aa5c18467782432f48bb687f83
Watersheds level    Map of the Indigenous Lands of Brazil ANA http://dadosabertos.ana.gov.br/datasets?group_ids=084346aa5c18467782432f48bb687f83
CNUC 2019 Conservation Units in Brazil MMA, 2019 http://mapas.mma.gov.br/i3geo/ogc.htm
Settlements
2017 Settlement map INCRA, 2017 http://acervofundiario.incra.gov.br/acervo/acv.php
CAR 2018 Areas Rural Environmental Registry Brazilian Forest Service, 2018 https://sistemas.florestal.gov.br/geoserver
Embargo 2019 Embargo areas Sinaflor, http://siscom.ibama.gov.br/geoserver/
Authorizations 2019 Permits for suppression and forest management Sinaflor/Ibama, SEMA-MT, SEMA-PA

http://siscom.ibama.gov.br/geoserver/

https://monitoramento.semas.pa.gov.br/monitoramento/#/sig

http://monitoramento.sema.mt.gov.br/simlam/

Rural real estate - INCRA SIGEF 2019 Delimitation of rural real estate

SIGEF/

INCRA

https://sigef.incra.gov.br/



IMAGE USED

 

MapBiomas Alerta uses high spatial resolution images of Planet (3.7 meters) and Sentinel-2 (10 meters), both with four spectral bands.

For each alert, dozens of daily images are checked to select two images, one before and one after deforestation, recording the identification of the images and the date of acquisition in the alert report.