Service Description: Great Smoky Mountains National Park Level IV Ecoregions
Service ItemId: 9c7c405b1a0f4840a2db56c65049c440
Has Versioned Data: false
Max Record Count: 1000
Supported query Formats: JSON
Supports applyEdits with GlobalIds: True
Supports Shared Templates: False
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Description: Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas. The approach used to compile this map is based on the premise that ecological regions can be identified through the analysis of patterns of biotic and abiotic phenomena, including geology, physiography, vegetation, climate, soils, land use, wildlife, and hydrology. The relative importance of each characteristic varies from one ecological region to another. A Roman numeral hierarchical scheme has been adopted for different levels for ecological regions. Level I is the coarsest level, dividing North America into 15 ecological regions. Level II divides the continent into 50 regions (Commission for Environmental Cooperation Working Group, 1997). At Level III, the continental United States contains 104 regions whereas the conterminous United States has 85 (U.S. Environmental Protection Agency, 2005). Level IV ecoregions are further subdivisions of Level III ecoregions. Methods used to define the ecoregions are explained in Omernik (1995, 2004), Omernik and others (2000), and Gallant and others (1989).
These data are a subset of a larger dataset published by the organization listed in the credits. Great Smoky Mountains National Park makes these data available in this form such that users can: effectively manipulate data for park mapping activites that do not require the aquistion of a large, nation-wide data set; alter symobology and rendering parameters natively; restrict analysis of geospatial data to an extent that coincides with the park footprint.
Copyright Text: US Environmental Protection Agency
Spatial Reference: 4269 (4269)
Initial Extent:
XMin: -88.1257209572916
YMin: 34.8008560092089
XMax: -81.3249338561595
YMax: 37.4918807840848
Spatial Reference: 4269 (4269)
Full Extent:
XMin: -84.392092581878
YMin: 35.1192886064686
XMax: -82.632366662429
YMax: 36.1400001841436
Spatial Reference: 4269 (4269)
Units: esriDecimalDegrees
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