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Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
The Global Burnt Area 2000 initiative: GBA-2000
Mapping, from SPOT-VEGETATION S1 imagery, of the areas burnt globally during the year 2000
An overview
J-M. Grégoire
SAI-GVM
June 2001
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
The Global Burnt Area 2000 initiative: GBA-2000
A contribution to the Global Land Cover (GLC 2000) initiative
In response to the needs for environmental assessment of the interactions
• between biomass burning and land cover change:Biodiversity, Desertification and Climate Change Conventions
• between biomass burning and emissions of GHG & aerosols:Climate Change Convention
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Biomass burning & land cover type/conditionsthree main situations
Regular & frequent burning is a characteristic of the land cover class• some kind of equilibrium between burning & land cover• example: African savannas of the Sudanian domain
Due to land use change, regular & frequent burning did appearrecently, but is not a characteristic of the current land cover class• there is a progressive modification of the land cover type or conditions• example: degraded tropical forests
Burning is an exceptional event, and certainly not a characteristicof the land cover class• there is a drastic & sudden modification of the land cover• example: fire events in evergreen rainforests of the tropical belt
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
a binary map (burnt-unburnt)
monthly non-accumulative global burn scar map, at 1 km resolution
statistics of burnt areas
area burnt in 2000 per country, per month, and
per main types of vegetation cover (IGBP-DIS, Hansen et al., …….)
GBA-2000 Product definition
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
GBA-2000 General approach
Selection of a limited number of co-investigators : 8criteria: access to validation data sets & field expertise/contacts
Development of regional algorithms for processing VGT S1 imagery to burnt area maps
Integration of the regional algorithms into a global processing chain at JRC
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
GBA 2000 Co-InvestigatorsCSIRO(AU) - UTL(P) - NRI(UK) - CNR(I) - CCRS (CA) - CRG (CA) - IFI (RU) - SAI (EU)
GBA test-sites (white rectangles; indicative position), with corresponding geographical coordinates (Ul; LR corners)
63N - 81W44N - 55W(CRG)
62.5N-112W57N-104.5W(CCRS)
18N - 93W7N - 77W(NRI)
5S - 75W20S - 45W(UTL)
17S - 21E28S - 29E(NRI)
10S - 22E28S - 42E(UTL)
18N - 18W0 - 52E(CNR)
44N - 10W36N - 0(UTL)
11S - 125E21S - 135E(CSIRO)
60N - 118E48N - 140E(IFI)
68N - 45E60N - 60E(IFI)
55N - 115E40N - 135E(UTL)
10S - 125E18S - 146E(GVM)
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Who is responsible for what ?
• SAI-GVM purchase of the SPOT-VGT S1 time series (costs shared with CNES) delivery (FTP, DAT, DLT …etc) of the regional datasets contribute to the purchase of high resolution imagery for validation implementation of the regional algorithms into a global processing chain overall co-ordination
• Regional Co-Investigators development & test of the regionally adapted algorithms performance assessment of the algorithms delivery of the algorithms to GVM contribution (tbd) to the validation of the end product
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Action plan & schedule
Data delivery to Co-I
Development & test of regional algorithms
Performance assessmentof regional algorithms
Consensus on set of regional algorithms
Integration of regional algo. into proc. chain
Generation of the GBA product
Accuracy assessment of the GBA product
Product dissemination
July 00 Jan 01 July 01 Dec 01 July 02
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
GBA-2000
Methodological component
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Pre-processing of the SPOT-VGT S1 time series
Masking
for clouds & cloud shadows (adapted from Kempeneers et al.,2000)
for extreme viewing zenith angles (> 50o)
for max. NDVI composite areas (+/- 32o Lat.)
for non-burnable areas. IGBP-DIS (EDC/USGS). Simple Biosphere Model 2 (EDC). Maryland Global Landcover Dataset (Hansen et al., 2000)
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Processing of the SPOT-VGT S1 to burnt area maps
Supervised temporal change detection techniques, on a pixel basisapplied to single date images (NRI, Flasse et al.; UTL, Pereira et al.)
non consecutive images: 5-day cycle (Boschetti et al., 2001)
Supervised temporal change detection techniques, on a pixel basisapplied to composite images (JRC, Stroppiana et al., 2001; IFI, Ershov et al.)
compositing = 10-day, min NIR
Supervised temporal change detection techniques, on a pixel basis but with a spatial dependency (CNR, Brivio et al.)
applied to single date imagescontextual window 3x3neural network approach
3 approaches currently testedAll based on change detection techniques in NIR, SWIR & NDWI
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
GBA-2000
Validation component
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
ref. Document prepared by NRI and CNR, and distributed by e_mail
GBA2000-Algorithm performance & final product assessmentComments and suggestions
(NRI and CNR, 21 February 2001)
Guidelines for validation
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
of the algorithmregression estimator, over the regionscovered by TM data• overall accuracy• omission & comission errors
of the classificationevaluation, on a grid basis over theentire region classified to BA
Outputfor each classification• overall accuracy of the map• overall accuracy of the algorithm• levels of under and overestimation
Performance analysis
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Performances of the algorithm
Set of BA maps derivedfrom SPOT-VGT1 map for each classificationtool
BA map derived from highresolution imagery (TM)
Regression estimator
1 to 1 line: level of omission and comission errors regression line: overall accuracy
Samples (14 x 14 km)randomly distributed
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
GBA 2000: validation sites
GBA validation sites, with corresponding co-investigators
Central Af.Rep. / CNR
Canada / CCRS
NiamibiaBotswana / NRI
Mozambic / UTL
Portugal / UTL
Siberia / IFI + UTL
West Russia / IFI
Guinea / CNR
Australia / JRC + CSIRO
Mexico / NRI
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
LEGEND OF VEGETATION TYPES IN TM FRAMES
Barren or Sparsely Vegetated Cropland/Natural Vegetation Croplands Evergreen Broadleaf Forest Grasslands Permanent Wetlands Savannas Urban and Built-Up Water Bodies Woody Savannas
N
N
N
N
N
NN
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
NN
N
N
201 - 52
201 - 54
200 - 53
198 - 54
199 - 53
179 - 56 177 - 56
181 - 57
177 - 57
N
EW
S
N
NN
N
N
N
NN
N
N
N
NN
N
N
N
NN
N
N
N
NN
N
N
201-52
201-54
200-53
198-54
199-53
Ivory CostSierra Leone
Liberia
Guinea
Mali
Senegal
Performance analysisRegion: Africa N-Eq. (sub-window 1)Co-I: CNR (Milan)Site(s): TM 201/52 10/12/99
TM 201/54 15/03/00TM 200/53 19/12/99 & 08/03/00TM 199/53 12/12/99TM 198/54 21/12/99
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
179-56 177-56
181-57
177-57
Central African Republic
Congo
Sudan
Tchad
N
EW
S
N
N
N
N
N
NN
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
NN
N
N
201 - 52
201 - 54
200 - 53
198 - 54
199 - 53
179 - 56 177 - 56
181 - 57
177 - 57
Barren or Sparsely Vegetated Cropland/Natural Vegetation Croplands Evergreen Broadleaf Forest Grasslands Permanent Wetlands Savannas Urban and Built-Up Water Bodies Woody Savannas
LEGEND OF VEGETATION TYPES IN TM FRAMES
Performance analysisRegion: Africa N-Eq. (sub window 2)Co-I: CNR (Milan)Site(s): TM 181/57 03/03/00
TM 179/56 30/11/99 & 06/04/00TM 177/56 16/11/99 & 04/02/00TM 177/57 02/12/99
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Site(s):
TM from 1999
105/69-70; 104/69-70
TM from 2000
105/070 02 - 18 /05/00
03 - 19 /06/00
05 - 21 /07/00
06 - 22 /08/00
07 - 23 /09/00
113/075 08/07/00
02/11/00
110/072 08/07/00
10/09/00
098/070 20/07/00
06/09/00
089/082 22/09/00
11/12/00
Performance analysis Australia
Co-I: GVM (Ispra)
EOC (Canberra)
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Performance analysisRussia & Siberia study-sites (IFI)
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Performance analysis Far East SiberiaCo-I: IFI (Moscow)
UTL (Lisbon)Site(s): TM 124/22 11/08/00 TM 118/23 14/06/00
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Site(s)TM 165/70 10/08/00
11/09/00 27/09/00
Performance analysisMozambic
Co-I: UTL (Lisbon)
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Site(s)
TM 204/31 6/10/00
TM 204/32 6/10/00
TM 204/33 6/10/00
TM 204/34 6/10/00
23/10/00
TM 203/31 7/10/00
TM 203/32 7/10/00
TM 203/33 7/10/00
Performance analysis Iberic Peninsula
Co-I: UTL (Lisbon)
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Site(s)
TM 179/74 12/08/00
31/10/00
TM 174/74 10/09/00
20/10/00
179-74
174-74
Performance analysis Namibia-Botswana
Co-I: NRI (Chatham)
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Site(s)
TM 30/45 18/04/00 20/05/00
TM 33/40 23/04/00 25/05/00
30-45
33-40
Performance analysis Mexico
Co-I: NRI (Chatham)
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Site(s)
TM 43-17 16/06/0004/09/00
TM 40-18 15/09/00TM 41-18 18/09/99
Performance analysis CanadaCo-I: CCRS (Ottawa)
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
Space Applications Institute(jmg/fireglob/Gba_vgt/GBA-2000_Project) Global Vegetation Monitoring Unit
GBA-2000 Status on June 2001
Data distribution to co-investigators completed
Development of regional algorithms+ completed for . Australia test-site
. Africa, Namibia/Botswana site
. Africa, Northern hemisphere+ initiated for . Africa, Mozambic test-site
. Russia, Far East Siberia
. Canada+ evaluation during the GOFC-Fire workshop, Lisbon, July 9-11
Performance analysis+ initiated for Australia & Africa
Global processing chain at JRC+ pre-processing module completed+ processing module: tests started over . African continent
. Australia