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Monitoring Deforestation in Amazonia using Remote Sensing Luís Fernandes Executive Secretary MCT Ministério da Ciência e Tecnologia
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Monitoring Amazon Deforestation Near real-time detection of newly deforested areas (DETER) Uses MODIS data (250 m resolution, 2 days revisit) Maps produced weekly Supports law-enforcement Detailed assessment of deforestation (PRODES) Uses LANDSAT (30 m resolution, 18 days revisit) and CBERS (20 m resolution, 25 days revisit) Other satellite data is used when needed Detailed maps produced yearly Supports policy-making
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CBERS: China-Brazil Earth Resources Satellite Brief History Initial agreement signed in July 6th, 1988, covering CBERS-1 and 2. In 2002, both governments decided to expand the initial agreement by including CBERS-3 and 4. Program objectives Build a family of remote sensing satellites to support the needs of users in earth resources applications Improve the industrial capabilities of space technology in Brazil and China
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CBERS-2 Launch (21 October 2003 ) CBERS-2
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CBERS Program Timeline Launc h Date Operatio n 20042005200620072008200920102011 CBERS-119994 years CBERS-220034 years CBERS-2B20064 years CBERS-320085 years CBERS-420115 years
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Near real-time detection of newly deforested areas Supports law-enforcement Information available as soon as possible Location and period of newly deforested area Accurate only for areas greater than 100 ha Fast result dissemination via Web
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DETER – Sensors TERRA e AQUA MODIS - Moderate-resolution Imaging Spectroradiometer Temporal resolution: Daily Spatial resolution: 250 m CBERS - China-Brazil Earth Resources Satellite WFI sensor Temporal resolution: 5 days Spatial resolution: 250 m
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Large deforestation detected by Deter in 22/jun/2004, in Altamira/PA Landsat 5 image of 22 Aug 2003 without deforestation evidences
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Grande desmatamento detectado pelo Deter em 22/jun/2004, município de Altamira/PA (s 05 08 11.89 o 53 55 15.73) Large deforestation detected by Deter in 22/jun/2004, in Altamira/PA MODIS image of 07 May 2004 without deforestation evidences
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MODIS image of 08 June 2004 showing first evidences of deforestation Large deforestation detected by Deter in 22/jun/2004, in Altamira/PA
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MODIS image of 22 June 2004 showing full extent of deforestation (6000 ha)
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Large deforestation detected by Deter in 22/jun/2004, in Altamira/PA Government actions in area: (a)Offender fined and jailed (b)Environmental protection area created
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Detailed assessment of deforestation (PRODES) Estimates yearly rates of gross deforestation Estimates the extension of gross deforestation Produces a digital data base Maps available on the Internet www.obt.inpe.br/prodes
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Detailed assessment of deforestation (PRODES) Computer aided image interpretation Improvements in 2005 Use of multisatellite data Results available in the same calendar year Technology developed by INPE Open source software
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Deforestation Forest Non-forest Clouds/no data INPE/PRODES 2003/2004: Deforestation Map
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Deforestation Map: Key Areas New frontiers Consolidated areas still under high deforestation pressure. Deforestation Forest Non-forest Clouds/no data INPE/PRODES 2003/2004:
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General Concepts: Increment and Rate Deforestation Increment Calculated for each image scene Sensitive to date of image acquisition Deforestation Rate Estimated on a image basis Areas under cloud cover have deforested area estimated from regional trends Rates are normalized to a reference date: 1 August
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Impact of cloud cover To reduce the impact of cloud cover, INPE combines images from different dates
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166-112 116-113 116-112 Combination CBERS-LANDSAT
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Combination CBERS-LANDSAT (zoom)
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Reducing cloud effect (date 1)
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Reducing cloud effect (date 2)
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Deforestation estimates for 2005 YearNum images Measured deforest area Estimated deforestat area Final measured area 2003-20047622.87026.15027.200 2004-20057716.60018.900 -
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Difference in rates 2005-2004 (%)
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MT/PA: areas more than 1000 ha (2004)
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MT/PA: areas more than de 1000 ha (2005)
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BR-163: areas greater than 100 ha (2004)
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BR-163: areas greater than 100 ha (2005)
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Cumaru (PA): areas greater than 100 ha (2004)
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Cumaru (PA): areas greater than 100 ha (2005)
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