GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

GLC 2000 – South America map

Presented by H.Eva

E. E. de Miranda C. di Bella

V. Gond O.Huber S.Jones

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Contributing Institutions

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Logistical Approach

1/. Centralised processing

2/. First-pass class labels

3/. Regional expert assessment of classes – re-labeling

4/. Class rationalisation

5/. Integration of specialist areas for regional product

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

1/. Centralised processing –the data set

Creation of seasonal mosaics from S10 product

Jan-Mar Apr-Jun July-Sept Oct-Dec

Cloud Screening

Image selection on lowest SWIR

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

•Combining of VGT seasonal images•Masking of evergreen forest (use of TREES 2000)

•Unsupervised clustering to 50 classes

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

2/. First pass class labeling

-Semi- evergreen forest

-Dry forest

-Shrubs (dense / sparse)

-Savannah with shrubs

-Savannah

-Sparse grasslands

-Agriculture

-Barren

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Class labeling

-Spectral signature

-Texture and context

-NDVI profile

-Existing land cover maps and ancillary data

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Major Problems

•Cloud shadow in forest areas and Andes

•Seasonal aspects not directly related to the land cover – snow / flooding / burning

• Main spectral ambiguity – grasslands / agriculture

•Urban areas not easy to descriminate

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Main problem areas – V1.1

NE Brazil Caatingas

Andes transect

Southern Brazil

Argentina from Monte to Steppe

Magellan grasslands

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Venezuela

Brazil

Southern Cone

Amazon forest

3/. Regional Experts working on data

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Regional Experts helping with validation

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

4/. Integration of specialist areas for regional product

Whilst all of South America is completed to the mimimum GLC 2000 legend – some areas/land cover types will have more detailed products

-NE Brazil

-Swamp forests (JERS-1 data)

-Bamboo dominated forests (Acre / Peru)

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Class rationalisation with other tropical regions

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Intercontinental comparisons of vegetation dynamic from NDVI- derived parameters for each map class

-maximum NDVI

-adjusted minimum NDVI

-range of NDVI

-rates of change of NDVI

-integrated NDVI

-parameters of seasonality (fit of seasonally adjusted curves)

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

NDVI maximum monthly image – allowing intercontinental comparisons

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

-NE Brazil should be ratified with EMBRAPA by the end of March

- A final “draft” for July / August

-first draft map has been created

-Errors due to spectral confusion

-Lack of adequate knowledge of certain cover types

Current Status

GLC 2000 – “FIRST RESULTS” WORKSHOPJRC – Ispra, 18-22 March 2002

Final Comment

Importance of the Global Legend

Importance of the Regional Legends and the partnerships with national experts worldwide