This feature dataset was quickly assembled from old Arc/Info coverages to produce a general representation of the state of Illinois and has not been reviewed or quality-controlled in any way and is not supported.
Attributes include NWI and IDNR identifiers and text designation of habitat. The data are in the Geographic Coordinate System, decimal degrees, NAD83. There are 13 habitat designations. Some examples are Bottomland Forest, Emergent Lake, Intermittent Riverine, Open Water Wetlands, and Swamp.
More recent data may be available at the NWI web site (<http://www.fws.gov/nwi/>). Data are available for download at that site by 1:24,000-scale and 1:100,000-scale quadrangle. Original NWI metadata are also available there.
U.S. Fish and Wildlife Service, Illinois Department of Natural Resources, 199604, National Wetlands Inventory in Illinois, 1987: ISGS GIS Database GISDB_HYDRO.IL_NWI_National_Wetlands_Inventory_1987, Illinois Natural History Survey, Champaign, Illinois.
This is a Vector data set.
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
Here is a list of the potential values for NAME:
Bottomland Forest Deep Marsh Deepwater Lake Emergent Lake Intermittent Riverine Lake Shore Open Water Wetlands Perennial Deepwater River Perennial Riverine Shallow Lake Shallow Marsh/Wet Meadow Shrub-Scrub Wetlands Swamp
The data are appropriate for use in local and regional thematic analysis. The data are not appropriate as a geodetic, legal or engineering base. The data set was not and is not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. The data have no legal basis in the definition of boundaries or property lines.
Data were loaded into ArcSDE. Metadata updated.
Person who carried out this activity:
, University of Illinois Web Privacy Notice.
, University Copyright Policy (stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4).
, Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign.
Attribute information from USFWS.
Digitized from 1:24,000K quad maps transcribed from high-altitude photography at 1:58,000. No further information available.
Wetlands and deepwater habitat identified as of 1980-1987 (depending on location) and based on the definitions of USFWS at the time of database construction. Areas down to .01 acres (ARC generated area) were included; many farmed wetlands were not digitized. Due to the dynamics of wetland systems, boundaries and classifications change over time.
Any additions to the National Wetlands Inventory since 1987 are not included.
Data were are topologically complete at the time data were stored as Arc/Info coverages. No additional information.
Are there legal restrictions on access or use of the data?
- ISGS information must be obtained directly from the ISGS or from an authorized distributor. Be aware that ISGS information obtained from an unauthorized third party may have been altered subsequent to original distribution, or may no longer be current.
Links to these are provided in the Cross References section.
- ISGS information is the property of and copyrighted by the Board of Trustees of the University of Illinois with all rights reserved. University copyright policy is stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4. A link is provided in the Cross References section.
Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, email@example.com. License fees and a license agreement may be required, depending on the proposed usage.
Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data. Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor.
The data do not replace the need for detailed site-specific studies.
Disclaimer of Liability Disclaimer of Warranties and Accuracy of Data Disclaimer of Endorsement Disclaimer for External Links Disclaimer of Duty to Continue Provision of Data Security Choice of Law
The data are intended for use with GIS software. The ISGS uses ESRI ArcGIS software, however, ESRI formats can be imported into many different GIS software packages. It is expected that customers who obtain these data have the technical expertise to use GIS software. The ISGS does not provide software support of any kind.
Illinois Natural Resources Geospatial Data ClearinghouseGenerated by mp version 2.8.25 on Thu Apr 02 09:54:08 2009