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Land areas covered by agricultural commodities
Row Crops: Predominantly corn and soybeans, including other
row tilled crops.
Land areas predominantly covered with grass
Small Grains: Oats, wheat, barley, etc.
Orchards/Nurseries: Fruit orchards and nurseries.
Urban Grassland: Residential lawns, golf courses, open spaces
and other managed grassland in urban and built-up areas
Rural Grassland: Alfalfa, hay, pasture, greenways and other grassland
cover situated outside of urban areas.
Shallow Marsh/Wet Meadow: Areas characterized by standing
water or saturated soils for brief to moderate periods during growing season.
Land areas built up with manmade structures
Deep Marsh: Areas characterized by standing water or saturated soils
on a semi-permanent or permanent basis during growing season.
Bottomland Forest: Forested wetland, temporarily or seasonally flooded.
Swamp: Forested wetland with permanent or semi-permanent water.
Shallow Water Wetland: Permanently flooded areas less than 20 acres
in extent and less than 2 meters deep (ponds, borrow pits, open areas of marsh
High Density: All or nearly all of the land surface covered
with manmade structures.
Land under water
Medium High Density: Transitional between medium and high density surface
coverage (found primarily in Cook County.
Medium Density: An intermediate amount of the land surface covered with
Low Density: Only a portion of the land area covered with manmade structures
that are intermixed with other land cover including urban grassland, wooded
Transportation: Major highways, interchanges and right-of-ways; active
rail lines; and rail lines no longer in service as of 1990.
Lakes and Rivers: Open water and major stream courses.
Streams: Minor stream courses that contain water year around.
Land without vegetation or structures (e.g., quarries, bare soil surfaces
Land Cover by Counties
Data for CTAP Land Cover Database, 1991-1995