file title : Olson World Ecosystem Classes Version 1.4D data type : byte file type : binary columns : 2160 rows : 1080 ref. system : lat/long ref. units : deg unit dist. : 1.0000000 min. X : -180.0000000 max. X : 180.0000000 min. Y : -90.0000000 max. Y : 90.0000000 pos'n error : unknown resolution : mixed .167/.5 min. value : 0 max. value : 73 value units : classes value error : unknown flag value : none flag def'n : none legend cats : 74 category 0 : Waters, including Ocean and Inland Waters category 1 : 1 CCX City complexes--being added for MM4 type cat.1 category 2 : 2 SSG Short or Sparse Grass/shrub of semiarid climates category 3 : 3 Not used category 4 : 4 Not used category 5 : 5 Not used category 6 : 6 TBE Temperate/Tropical-montane Broadleaf Evergreen covers warm temperate or montane broadleaf evergreen forest [Africa only] category 7 : 7 Not used category 8 : 8 DMB Desert, mostly bare stone, clay or sand category 9 : 9 Not used category 10 : 10 Not used category 11 : 11 Not used category 12 : 12 Not used category 13 : 13 Not used category 14 : 14 Not used category 15 : 15 Not used category 16 : 16 {BES} Broadleaf Evergreen Scrub, commonly with #46 and #47 category 17 : 17 ICE Antarctic ice cap category 18 : 18 Not used category 19 : 19 Not used category 20 : 20 SRC Snowy, rainy coastal conifer category 21 : 21 MBC Main Boreal conifer forest, closed or open category 22 : 22 SNB Snowy non-Boreal conifer forest category 23 : 23 CDF Conifer/deciduous, snow persisting in winter category 24 : 24 TBC Temperate Broadleaf/Conifer forest: with deciduous and/or evergreen hardwood trees category 25 : 25 SDF Snowy Deciduous Forest, i.e. summergreen (=cold-deciduous) types category 26 : 26 TBF Temperate broad-leaf forest: deciduous, semideciduous, and some temperate-subtropical broadleaf evergreen types that are least active in winter. category 27 : 27 NSC Non-snowy conifer forest category 28 : 28 TMC Tropical montane complexes, typically evergreen, including dwarfed ("elfin") forest, opening to grass, or tall or short forbs (puna, paramo) category 29 : 29 TBS Tropical Broadleaf Seasonal, with dry or cool season category 30 : 30 CFS Cool Farmland & Settlements, more or less snowy category 31 : 31 MFS Mild/hot farmland & settlements category 32 : 32 RGD Rain-green (drought-deciduous) or very seasonal dry evergreen forests to open woodlands, very frequently burned. category 33 : 33 TRF Tropical RainForest category 34 : 34 Not used category 35 : 35 Not used category 36 : 36 PRA Paddy rice and associated land mosaics category 37 : 37 WCI Warm/hot cropland, Irrigated extensively category 38 : 38 CCI Cool cropland with Irrigation of variable extent category 39 : 39 CCP Cold cropland and pasture, irrigated locally category 40 : 40 CGS Cool grass/shrub, showy in most years category 41 : 41 MGS Mild/warm/hot grass/shrub category 42 : 42 CSM Cold steppe/meadow +/- larch woods (in Siberia), scrub (Bering sea) or tundra (Tibetan highland) category 43 : 43 SGW Savanna/Grass, seasonal woods: Trees or shrubs above grass groundcover may be interspersed on many scales in savana belts of varying drought duration and high fire frequency category 44 : 44 MBF Mires include peaty Bogs and Fens (mostly in high latitudes) category 45 : 45 MOS Marsh or other swampy wetlands include various transitionsto or mixtures with trees category 46 : 46 MES Mediterranean-type Evergreen (mostly) broadleaved Scrub and forest relics category 47 : 47 DHS Dry or highland scrub, or open woodland category 48 : 48 DEW Dry Evergreen Woodland or low forest, mapped mostly in interior Australia and South America category 49 : 49 HVI Hot-mild volcanic "islands" (Galapogos), with local denser forest on some older lava flows but wide areas of sparse cover on recent lavas) category 50 : 50 SDB Sand Desert, partly Blowing dunes category 51 : 51 SDS SemiDesert/Desert Scrub/succulent/sparse grass category 52 : 52 CSS Cool/cold shrub semidesert/steppe category 53 : 53 TUN Tundra (polar, alpine) category 54 : 54 TER Temperate Evergreen Rainforest (e.g., in Chile) category 55 : 55 SFW Snowy Field/Woods complex category 56 : 56 FFR Forest/Field complex with Regrowth after disturbances, mixed with crops and/or other non-wooded lands category 57 : 57 SFF Snowy Forest/Field, commonly openings are pasture and/or mires category 58 : 58 FWG Field/Woods with Grass and/or Cropland category 59 : 59 STW Succulent and Thorn Woods or scrub is widespread category 60 : 60 SDT Southern Dry Taiga or similar aspen/birch with northern and/or mountain conifers category 61 : 61 LT Larch Taiga with deciduous conifer category 62 : 62 NMT Northern or maritime taiga typifies a wide latitude belt or a narrow altitude belt above denser forest or woodland category 63 : 63 WTM Wooded tundra margin or mountain scrub/meadow) category 64 : 64 HMW Heath and Moorland, Wild or artificially managed, as by burning and/or grazing. Can include wetland (#44-45) interspersed with drier heath, with dwarfed or taller, commonly dense scrub on peat or sand category 65 : 65 CNW Coastal: NorthWest quadrant near most land category 66 : 66 CNE Coastal: NorthEast quadrant near most land category 67 : 67 CSE Coastal: SouthEast quadrant near most land category 68 : 68 CSW Coastal: SouthWest quadrant near most land category 69 : 69 PDL Polar desert with rock Lichens, locally abundant or productive (even between mineral grains) but provide little food. Animals import residues for localized humus category 70 : 70 GLA Glaciers in polar or alpine complex, with rock fringes category 71 : 71 SSF Salt/soda flats desert playas, occasionally with intermittent lakes category 72 : 72 MSM Mangrove and non-saline swamps and tidal Mudflats [Africa only] category 73 : 73 ISL Islands and shore waters in oceans and/or lakes [Elba Island] comment : Olson's 72 World Ecosystem classes (not all classes used) comment : This version is a refinement of WE1.4. Changes include: comment : (1) Trimmed desert and bare ground using AVHRR/GVI data comment : (2) Trimmed coastline areas using elevation data comment : (3) Added Elba Island comment : (4) Corrected mis-located tropical montane classes comment : (5) Other miscellaneous corrections comment : This data file contains mixed resolutions. comment : The data file named OWE14R provides an overlay to determine comment : which cells contain 10-minute and 30-minute data. lineage : Derived from Olson World Ecosystems Version 1.4 (prototype) lineage : Version 1.4 was an extension of Version 1.2, previously lineage : distributed by CDIAC, Oak Ridge National Laboratory completeness: 10-minute updates are incomplete. Complete coverage of land completeness: areas is achieved by a mix of 10-min and 30-min classes. consistency : Mixed spatial dominance at 10-minutes and 30-minutes.