Download presentation
Presentation is loading. Please wait.
Published byYasmin Loar Modified over 10 years ago
1
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – 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
2
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002 Contributing Institutions
3
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – 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
4
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – 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
5
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002 Combining of VGT seasonal images Masking of evergreen forest (use of TREES 2000) Unsupervised clustering to 50 classes
6
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – 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
7
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002 Class labeling -Spectral signature -Texture and context -NDVI profile -Existing land cover maps and ancillary data
8
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002
9
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002
10
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – 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
11
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002 Main problem areas – V1.1 NE Brazil Caatingas Andes transect Southern Brazil Argentina from Monte to Steppe Magellan grasslands
12
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002 Venezuela Brazil Southern Cone Amazon forest 3/. Regional Experts working on data
13
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002 Regional Experts helping with validation
14
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – 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)
15
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002 Class rationalisation with other tropical regions
16
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – 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)
17
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002 NDVI maximum monthly image – allowing intercontinental comparisons
18
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – 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
19
GLC 2000 – “FIRST RESULTS” WORKSHOP JRC – Ispra, 18-22 March 2002 Final Comment Importance of the Global Legend Importance of the Regional Legends and the partnerships with national experts worldwide
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.