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GLC2000 Land Cover Classification

GLC2000 Land Cover Classification. Main characteristics of GLC 2000 classification. No pre-defined class names but land cover is described by a set of classifiers and attributes based on the FAO LCCS:  LCCS definitions and thresholds accepted.

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GLC2000 Land Cover Classification

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  1. GLC2000 Land Cover Classification

  2. Main characteristics of GLC 2000 classification • No pre-defined class names but land cover is described by a set of classifiers and attributes based on the FAO LCCS: LCCS definitions and thresholds accepted 2. Land cover should be described at any geographical scale at the best possible detail 3. Detail of a legend depends on the • information obtainable from SPOT VEGETATION 2000 data • capability to map a class consistently • auxiliary map or information sources • Regional and sub-regional legends are developed - following a  Minimum set of mandatory classifiers The global legend will be achieved by grouping of regional classifiers and attributes

  3. Rationale for the approach • regional or sub-regional maps can be produced with detailed legend • legends can be formed according to user needs and purpose • no need to force a regional land cover in a predefined global class name • links possible to the national and local data, if all coded with LCCS • follow a standardized classification approach • enlarge the potential applications and user group • address different geographical scale • Requirement : • mandatory minimum set of land cover classifiers to be followed in order to achieve a uniform and consistent global map

  4. Minimum Requirements : ‘Cropland’ (terrestrial) & Bare Areas ‘Cultivated and Managed Terrestrial Areas’ • Surface aspect • Consolidated • Bare rock • Hardpan • Unconsolidated • Bare Soil • Loose and shifting sand

  5. Minimum Requirements: ‘Natural vegetation’ (terrestrial)

  6. GLC2000 - Global Land Cover Classes 21 land cover classes are presently proposed for display at the global level

  7. GLC2000 - Global Land Cover Classes: Non-forest

  8. Example of aggregating regional classes to global legend: South-Asia

  9. Land cover information needed for aggregation

  10. Issues to be decided • Proposal: Display at the global level the two classes for broadleaved deciduous tree cover • a) closed: >>> forest type • b)open: >>>> open forests & woodland formations • Rationale: • display large tropical and sub-tropical dry forest-woodland formations in Africa, SE-Asia & S-America separate from the mainly closed temperate and boreal deciduous forests • some Mediterranean forests would be in the open class • the open boreal coniferous and mixed forests are not concerned by this separation.

  11. Issues to be decided • Proposal: • Map the swamp forests together with the mangrove forests as • regularly flooded • Rationale: • more consistent with LCCS concept (than only mangroves) • represent large areas of swamp forests in C-Africa, S-America, SE-Asia • differentiation between mangroves and swamp forest is clear because of the location of mangroves at the coast • check whether consistently and important in other regions

  12. Issues to be decided • Map burnt areas as a separate class • Rationale: No decision can be made on whether to assign these areas in the boreal or humid tropical zone to trees, shrubs, grass or mixtures • Proposal: • I. Burning is an annual and regular process • Map burnt areas along with the non-burnt class: burnt savannah (herbaceous cover)  remains herbaceous cover • II. Burning is a single event or occurring in long intervals • If post-fire vegetation unknown > assign to shrub or sparse vegetation • introduce a class ‘natural vegetation, burnt’?

  13. Issues to be decided Proposal: Make a difference between natural grassland and pasture at the global level?

  14. Issues to be decided Mosaics: Are the present mosaic classes appropriate? Mosaic Tree cover & other natural vegetation Mosaic Cropland & Tree cover Mosaic Cropland & Other natural vegetation & Trees

  15. Issues to be decided Mixed forests: Do we need more than one class of mixed forest? Mixed needle-leaved and broadleaved forests Mixed evergreen and deciduous forest Mixed evergreen and deciduous needle-leaved forest

  16. Issues to be decided • What to display on global legend on global map • Display LCCS class name Tree cover, broadleaved, deciduous, open • Display a user class names? Open deciduous forests and woodlands • Display additional fields • with regional user class names? • Global: Tree cover, broadleaved, deciduous, open • Africa: Miombo • S-America: Catingas • SE-Asia: Dry Dipterocarp forest • For regional legends on regional maps • Regional LCCS class + regional user name • For the digital data set • Global LCCS class name • + Regional LCCS class name • + Regional user name • + full LCCS Code

  17. The End…

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