Description

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Ecoregions, Levels III and IV, 1996 (1:250,000) - Shows areas within which ecosystems (and the type, quality, and quantity of environmental resources) are generally similar. Level I divides North America into nine ecological regions. Level II divides the continent into 32 classes. Level III is the hierarchical level shown on this map. For portions of the United States the ecoregions have been further subdivided to level IV. Derived and modified from a preexisting shapefile by A. Woods and others, U. S. Geological Survey. Additional information is available from U.S. Environmental Protection Agency, National Health and Environmental Effects Laboratory (NHEERL).

Dataset Attributes

  • OBJECTID
    Number
  • Ecoregion Level 4 Code
    Text
    {"value"=>"54a", "count"=>2} (), {"value"=>"57a", "count"=>1} (), {"value"=>"56c", "count"=>1} (), {"value"=>"55a", "count"=>1} (), {"value"=>"54d", "count"=>1} (), {"value"=>"54b", "count"=>1} (), {"value"=>"54c", "count"=>1} (), {"value"=>"56d", "count"=>1} (), {"value"=>"56b", "count"=>1} (), {"value"=>"56a", "count"=>1} ()
  • Ecoregion Level 4 Name
    Text
    {"value"=>"Illinois/Indiana Prairies", "count"=>2} (), {"value"=>"Maumee Lake Plains", "count"=>1} (), {"value"=>"Middle Tippecanoe Plains", "count"=>1} (), {"value"=>" Clayey High Lime Till Plains", "count"=>1} (), {"value"=>"Kankakee Sand Area", "count"=>1} (), {"value"=>"Chicago Lake Plain", "count"=>1} (), {"value"=>"Kankakee Marsh", "count"=>1} (), {"value"=>"Michigan Lake Plain", "count"=>1} (), {"value"=>"Elkhart Till Plains", "count"=>1} (), {"value"=>"Lake Country", "count"=>1} ()
  • Ecoregion Level 3 Code
    Number
    54 to 72
  • Ecoregion Level 3 Name
    Text
    {"value"=>"Interior Plateau", "count"=>6} (), {"value"=>"Eastern Corn Belt Plains", "count"=>6} (), {"value"=>"Central Corn Belt Plains", "count"=>5} (), {"value"=>"Interior River Valleys and Hills", "count"=>4} (), {"value"=>"Southern Michigan/Northern Indiana Drift Plains", "count"=>4} (), {"value"=>"Huron/Erie Lake Plains", "count"=>1} ()
  • Shape
    Number
  • SHAPE_Length
    Number
  • SHAPE_Area
    Number

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