Critical Trends Assessment Land Cover Database of Illinois, 1991-1995

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Dr. Donald Luman, Mark Joselyn, Liane Suloway, Illinois Department of Natural Resources

Publication_Date: 199603

Title:

Critical Trends Assessment Land Cover Database of Illinois, 1991-1995

Geospatial_Data_Presentation_Form: remote-sensing image

Series_Information:

Series_Name: IDNR GIS Database

Issue_Identification: /gisdb/county/<county_name>/landcov

Publication_Information:

Publication_Place: Champaign, Illinois

Publisher: Illinois Department of Natural Resources

Larger_Work_Citation:

Citation_Information:

Originator:

Illinois Natural History Survey, Illinois State Geological Survey, Illinois Department of Natural Resources

Publication_Date: 199603

Title:

Critical Trends Assessment Land Cover Database of Illinois, 1991-1995

Geospatial_Data_Presentation_Form: remote-sensing image

Publication_Information:

Publication_Place: Champaign, Illinois

Publisher: Illinois Department of Natural Resources

Description:

Abstract:

County by county land cover grid data for Illinois derived from Thematic Mapper (TM) Satellite data from the Landsat 4 sensor. Dates of the imagery used range from April, 1991 to May, 1995. 21 Scenes were used, two dates for each of ten scene areas needed to cover the state (Path/Row 24/31, 24/32, 24/33, 23/31, 23/32, 23/33, 23/34, 22/32, 22/33, 22/34) with an additional single scene needed to fill a small area along the northern border (24/30). Raw data were obtained in Space Oblique Mercator projection for 14 scenes, 7 scenes were delivered in UTM zone 16. Georeferenced data were modified using vector field segmentation with a threshold of 70 prior to being separated into urban and non-urban sets which were then clustered using PCI Image Processing software's ISOCLUS (ISODATA) algorithm. In addition, areas falling under a modified boundary of municipal areas determined by the 1992 TIGER/Line files was used to identify built up areas in the non-urban landscape. The urban classes for these areas were imposed upon the non-urban classified landscape. In general 250 spectral clusters were identified in the non-urban areas with 100 to 150 clusters being identified for the urban areas. A Maximum Likely Classification was run using the signatures generated by ISOCLUS to create the theme channel used for coding. Ancillary data included the Illinois Wetlands Inventory, NRCS (ASCS) county crop compliance data, 1988 CIR NAPP photography (20% sample), 1988 BW NAPP (100%) sample, DNR digital vector roads, streams, and railroads. Nineteen Land cover classes were identified.

Purpose:

This database was completed as an integral part of the Critical Trends Assessment Project. It is intended to serve as a base line for assessment and management of biologic natural resources in Illinois. It is a good medium scale land cover map of the entire state.

Supplemental_Information:

The path to these data sets is /gisdb/county/<county_name>/landcov where <county_name> should be replaced with the name of the county of interest. Longer county names have been truncated to eight characters.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19910417

Ending_Date: 19950530

Currentness_Reference: Acquisition date of raw imagery by satellite

Status:

Progress: Complete

Maintenance_and_Update_Frequency: unknown

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -91.7

East_Bounding_Coordinate: -87.5

North_Bounding_Coordinate: 42.76

South_Bounding_Coordinate: 36.9

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: land cover

Theme_Keyword: landcover

Theme_Keyword: satellite

Theme_Keyword: imagery

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Illinois

Access_Constraints: none

Use_Constraints:

Reproduction or redistribution of copyrighted digital data sets or products derived therefrom outside of licensee's organization or entity is expressly forbidden. The only exception is redistribution to consultants working for the licensee, and then only for purposes, related to work for the licensee. Such consultants may not further reproduce or redistribute these data sets. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or in part, without permission of the appropriate custodial division within DNR.

Any hardcopies utilizing DNR data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent DNR data sets, nor to imply that changes they made were approved by DNR.

These data are not to be used for commercial profit.

Identification of Illinois Department of Natural Resources, Critical Trends Assessment Project as the source is mandatory.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Illinois State Geological Survey

Contact_Position: Information Office

Contact_Address:

Address_Type: mailing and physical address

Address: 615 East Peabody Drive

City: Champaign

State_or_Province: Illinois

Postal_Code: 61820

Country: USA

Contact_Voice_Telephone: 217-333-4747

Contact_TDD/TTY_Telephone: 217-785-0211

Contact_Facsimile_Telephone: 217-244-0802

Contact_Electronic_Mail_Address: isgs@isgs.uiuc.edu

Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time

Native_Data_Set_Environment:

PCI, PCDSK file; ESRI Arc/Info version 7.0.3 Grid, UNIX, SunOS 5.x

Cross_Reference:

Citation_Information:

Originator: Illinois Natural History Survey

Publication_Date: 199603

Title:

Colormap file to reproduce the colors of the published (hardcopy) map.

Geospatial_Data_Presentation_Form: ancillary data

Series_Information:

Series_Name: IGIS GIS Database

Issue_Identification: /gisdb/ancillary/landcov.clr

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

No accuracy assessment of the classification has been performed.

Logical_Consistency_Report: not available

Completeness_Report:

All of Illinois is covered. A local filter was run after classification. The threshold used ranged from 2 pixels to 6 pixels.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Agrees with the 1:100,000 vector layers very well.

Lineage:

Process_Step:

Process_Description: see abstract

Process_Date: unknown

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: varies for each county

Column_Count: varies for each county

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Lambert Conformal Conic

Lambert_Conformal_Conic:

Standard_Parallel: 33 0 0.000

Standard_Parallel: 45 0 0.000

Longitude_of_Central_Meridian: -89 30 0.000

Latitude_of_Projection_Origin: 33 0 0.000

False_Easting: 914400.00000 meters

False_Northing: 0.00000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: unknown

Ordinate_Resolution: unknown

Planar_Distance_Units: feet

Geodetic_Model:

Horizontal_Datum_Name: NAD27

Ellipsoid_Name: CLARKE1866

Semi-major_Axis: 6378206.4 meters

Denominator_of_Flattening_Ratio: 294.98

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

LAND COVER CLASSES: NOTE: Class values stored in item VALUE for each Arc/Info Grid

Urban and Built-Up Land 1 - High Density (all or most of the surface cover is comprised of ' impervious material) 2 - Medium-High Density (transitional between Medium and High Density; ' located in Cook County only) 3 - Medium Density (a significant proportion of the surface cover ' is comprised of impervious material) 4 - Low Density (small amount of surface area comprised of ' impervious material mixed with other land cover such as ' Grassland, Wooded Land, etc.)

Transportation [ONLY PRESENT IN land2utm] 5 - Major Roadways (Major Highways updated 1992) 6 - Active Railroads (1991) 7 - Abandoned Railroads (1991)

Crop Land 8 - Row Crop (corn, soybeans, and other tilled crops) 9 - Small Grains (wheat, oats, etc.) 10 - Orchards/Nurseries

Grassland 11 - Urban Grassland (parks, residential lawns, golf courses, ' cemeteries, and other open space) 12 - Rural Grassland (pastureland, grassland, waterways, ' buffer strips, CRP land, etc.)

Wooded and Forested Land 13 - Deciduous: undifferentiated broadleaf deciduous, closed canopy 14 - Deciduous: undifferentiated broadleaf deciduous, open canopy 15 - Coniferous: undifferentiated

16 - Open Water 17 - Perennial Streams [ONLY PRESENT IN land2utm]

Wetland 18 - Shallow Marsh/Wet Meadow 19 - Deep Marsh 20 - Forested Wetlands 21 - Swamp 22 - Shallow Water Wetlands

23 - Barren Land (e.g., quarries, sandy beaches, ' exposed soil surfaces, etc.)

Entity_and_Attribute_Detail_Citation: none

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Illinois State Geological Survey

Contact_Position: Information Office

Contact_Address:

Address_Type: mailing and physical address

Address: 615 East Peabody Drive

City: Champaign

State_or_Province: Illinois

Postal_Code: 61820

Country: USA

Contact_Voice_Telephone: 217-333-4747

Contact_TDD/TTY_Telephone: 217-785-0211

Contact_Facsimile_Telephone: 217-244-0802

Contact_Electronic_Mail_Address: isgs@isgs.uiuc.edu

Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time

Distribution_Liability:

The Illinois Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of DNR, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.

In no event shall the DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by DNR.

Metadata_Reference_Information:

Metadata_Date: 19970307

Metadata_Review_Date: 19970307

Metadata_Future_Review_Date: 19980401

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Illinois State Geological Survey

Contact_Position: Information Office

Contact_Address:

Address_Type: mailing and physical address

Address: 615 East Peabody Drive

City: Champaign

State_or_Province: Illinois

Postal_Code: 61820

Country: USA

Contact_Voice_Telephone: 217-333-4747

Contact_TDD/TTY_Telephone: 217-785-0211

Contact_Facsimile_Telephone: 217-244-0802

Contact_Electronic_Mail_Address: isgs@isgs.uiuc.edu

Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time

Metadata_Standard_Name:

FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: none

Metadata_Use_Constraints: none

Illinois Natural Resources Geospatial Data Clearinghouse