Environmental corridors are areas in the landscape containing especially high value natural, scenic, historic, scientific, and recreational features. Environmental corridors and isolated natural resource areas consist of the following 12 natural resource and natural resource-related elements: 1) lakes, rivers, and streams and their associated shorelands and floodplains; 2) wetlands; 3) woodlands; 4) prairies; 5) wildlife habitat areas; 6) wet, poorly drained, or organic soils; 7) rugged terrain and high-relief topography; 8) existing park and open space sites; 9) potential park and open space sites; 10) historic sites; 11) significant scenic areas and vistas; and 12) natural and scientific areas. Primary environmental corridors include a wide variety of these resource and resource-related elements and are at least 400 acres in size, two miles in length, and 200 feet in width. Secondary environmental corridors generally connect with primary environmental corridors, and are at least 100 acres in size and one mile in length. Isolated natural resource areas contain some of these resource and resource-related elements, are separated physically from environmental corridors by intensive urban or agricultural land uses, and are at least five acres in size.
The environmental corridor and isolated natural resource area polygons are identified by a tag or label consisting of one of the following codes:
PEC ............ Primary environmental corridor
SEC ............ Secondary environmental corridor
INRA .......... Isolated natural resource area
OUT ............ Area outside of environmental corridors
950 .............. Surface water from SEWRPC land use inventory
PEC.950 ...... Surface water inside PEC
SEC.950 ...... Surface water inside SEC
INRA.950 ... Surface water inside INRA
The digital map files are available in ESRI geodatabase and shapefile format. The files consist of graphic map features only and do not contain additional attributes at this time.
Information about the features included in this data set are contained in a document entitled "Environmental Corridor Inventory Digital Map File Data Dictionary" written by the Southeastern Wisconsin Regional Planning Commission GIS Division.