Illinois Natural History Survey's 1999-2000 1:100 000 Scale Illinois Gap Analysis Land Cover Classification, Raster Digital Data, Version 2.0, September 2003

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Illinois Natural History Survey

Publication_Date: 20030930
Title:
Illinois Natural History Survey's 1999-2000 1:100 000 Scale Illinois Gap Analysis Land Cover Classification, Raster Digital Data, Version 2.0, September 2003
Edition: Version 2.0
Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher:
Illinois Natural History Survey, Illinois Department of Natural Resources
Other_Citation_Details:
Please use this hyperlink for additional citation information.

<http://www.agr.state.il.us/gis/index.html> >

Description:
Abstract:
The Illinois Natural History Survey (INHS) Illinois Gap Analysis Land Cover Classification is a land cover classification for Illinois. Vegetation is classified according to the Illinois Natural Community Level, as outlined in the Illinois Natural Areas Inventory Technical Report (1978). An attempt was made, where possible, to classify the vegetation to the Alliance (Species) Level Classifications developed by the Nature Conservancy. Data is also generalized to the National Vegetation Classification Standard (NVCS) developed by the Federal Geographic Data Committee (FGDC). A list of the land cover categories and their codes can be found in the data dictionary.

The Illinois Gap Analysis Land Cover Classification is a raster, geo-referenced, categorized land cover data layer produced using satellite imagery from the Thematic Mapper (TM) instrument on Landsat 5 and the Enhanced Thematic Mapper (ETM+) on Landsat 7. The data are geospatial and georeferenced to UTM Zone 16 NAD 83 GRS 1980. The data were derived from 1999 and 2000 Landsat 5 and Landsat 7 TM satellite imagery acquired between the dates of April 30, 1999 and October 10, 2000. The approximate scale is 1:100,000 with a ground resolution of 30 meters by 30 meters. The Illinois Gap Analysis layer is aggregated to 29 standardized categories for display purposes.

Purpose:
This database was completed as an integral part of the Illinois GAP Project. The purpose of this land cover map is to depict a statewide natural community or alliance-level vegetation classification (as defined by the Nature Conservancy). This data is intended to serve as a vegetation database for the management of natural resources in Illinois and is being collected in conjunction with the vertebrate and public land stewardship databases.

In addition, this dataset is part of a nationwide GAP project and a national mapping effort sponsored by the United States Geological Survey (USGS), as an attempt to identify and protect private or unmanaged land with potential for high levels of biodiversity.

Supplemental_Information:
In addition to the Illinois Natural History Survey and the Illinois Department of Natural Resources, other state agencies participated and assisted in the creation of this dataset. These agencies include: Illinois State Geological Survey, Illinois Department of Agriculture, National Agriculture Statistics Service, and the Illinois GAP Analysis Project.

The updating of this dataset is the responsibility of the United States Geological Survey (USGS), as directed by National GAP Analysis Project office.

ERDAS Imagine 8.5 is used as the Illinois Gap Analysis's main image processing software.

Additional information about the Erdas Imagine .img formats can be found at: <http://www2.erdas.com/SupportSite/documentation/files/erdas7xfiles.pdf>

Additional information about EarthSat Inc's ortho-rectified GeoCover Stock used to georegister the Illinois Gap Analysis Layer can be found at: <http://www.geocover.com/>.>

Satellite images are georeferenced and identified by path and row.

NOTE: The publication dates listed for the satellite imagery may or may not represent the actual date that the satellite acquired the ground data.

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1999
Ending_Date: 2000
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: none planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -91.5131
East_Bounding_Coordinate: -87.4952
North_Bounding_Coordinate: 42.5083
South_Bounding_Coordinate: 36.9703
Keywords:
Theme:
Theme_Keyword_Thesaurus: None

Theme_Keyword: land cover
Theme_Keyword: classification
Theme_Keyword: vegetation cover
Theme_Keyword: GAP Analysis
Theme_Keyword: land use
Theme_Keyword: Landsat
Theme_Keyword: NVCS
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (FIPS 5-2): Washington, DC, National Institute of Standards and Technology.
Place_Keyword: Illinois
Access_Constraints: None
Use_Constraints:
Reproduction or redistribution of copyrighted digital data sets or products derived there from outside of licensees' 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 of Illinois Natural History Survey (INHS) or the Illinois Department of Natural Resources (IDNR).

Any hardcopies utilizing INHS/IDNR data sets shall clearly indicate their source. The following source citation must be included: "Source: Illinois Natural History Survey's 1999-2000 1:100 000 Scale Illinois Gap Analysis Land Cover Classification, Raster Digital Data, Version 2.0, September 2003."

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 INHS/IDNR data sets, nor to imply that changes they made were approved by Illinois Natural History Survey or the Illinois Department of Natural Resources.

These data are not to be used for commercial profit.

The minimum mapping unit is 2 hectares; any use of this map at a finer scale may be inaccurate.

Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Illinois Natural History Survey
Contact_Person: Patrick Brown
Contact_Position: Principal Investigator, Illinois GAP Analysis Project
Contact_Address:
Address_Type: mailing and physical address
Address: 607 E. Peabody Drive

City: Champaign
State_or_Province: Illinois (IL)
Postal_Code: 61820
Country: USA
Contact_Voice_Telephone: 217-244-4289
Contact_Facsimile_Telephone: 217-333-4949
Contact_Electronic_Mail_Address: pbrown@mail.inhs.uiuc.edu
Hours_of_Service: 0800-1700 Central Standard Time
Contact_Instructions: email, phone, fax, or mail
Data_Set_Credit:
Brooke Bahnsen, Linda Schwab, Tari Tweddale, Illinois Natural History Survey, Champaign, Illinois Christopher Goldsmith, Donald Luman, and Christopher Stohr, Illinois State Geological Survey, Champaign, Illinois Jay D. Davis, Department of Agricultural Engineering, University of Illinois, Champaign, Illinois Patrick Willis, National Agriculture Statistics Service, Springfield, Illinois Illinois Department of Agriculture staff, Springfield, Illinois
Native_Data_Set_Environment:
Image processing is performed by ERDAS Imagine version 8.4 and later, 8.5 using UNIX and PC hardware. The land cover was prepared in *.img format.


Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:

Classification accuracy is generally between 85% to 95% correct for agricultural-related land cover categories.

Land cover codes have been reviewed by INHS, IDNR, and NASS experts and are believed to be "good" at the time of satellite over flight.

National Vegetation Classification System (NVCS) codes are based on the NVCS key outlined by the Federal Geographic Data Committee.

Natural Community names are based, in part, on the Illinois Natural Areas Inventory natural community names.

Agricultural land cover names were conceived by the National Agriculture Statistics Service.

For a complete list of attributes, see the Data Dictionary located in the Entity and Attribute Information section of this metadata.

Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value:
Classification accuracy is generally between 85% to 95% correct for agricultural-related land cover categories.

This map has not been quantitatively assessed for accuracy, but the goal of the final product is to be 80% accurate for each category.

Land cover classes have been assessed at an intermediate level for accuracy and are generally greater than 80% accurate.

Attribute_Accuracy_Explanation:
Agricultural classes were derived from known ground point locations and a supervised classification was performed on the agricultural classes.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Landsat 5
Title: LANDSAT TM Path 22, Row 32
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: USGS EROS Data Center
Publication_Place: Sioux Falls, South Dakota, USA
Publication_Date: 20001001
Other_Citation_Details:
LANDSAT TM Path 22, Row 32. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

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Source_Contribution: Raw data used in land cover spectral signature analysis.
Source_Information:
Source_Citation:
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Originator: Landsat 7
Title: LANDSAT TM Path 22, Row 32
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: USGS EROS Data Center
Publication_Place: Sioux Falls, South Dakota, USA
Publication_Date: 20001001
Other_Citation_Details:
LANDSAT TM Path 22, Row 32. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

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Source_Information:
Source_Citation:
Citation_Information:
Originator: Landsat 5
Title: LANDSAT TM Path 22, Row 33
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Space Imaging EOSAT
Publication_Place: Thornton, Colorado, USA
Publication_Date: 19991001
Other_Citation_Details:
LANDSAT TM Path 22, Row 33. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

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Source_Information:
Source_Citation:
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Originator: Landsat 7
Title: LANDSAT TM Path 22, Row 33
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: USGS EROS Data Center
Publication_Place: Sioux Falls, South Dakota, USA
Publication_Date: 19991001
Other_Citation_Details:
LANDSAT TM Path 22, Row 33. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

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Publication_Date: 20001001
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LANDSAT TM Path 22, Row 34. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

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Source_Information:
Source_Citation:
Citation_Information:
Originator: Landsat 5
Title: LANDSAT TM Path 23, Row 31
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Space Imaging EOSAT
Publication_Place: Thornton, Colorado, USA
Publication_Date: 19991001
Other_Citation_Details:
LANDSAT TM Path 23, Row 31. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

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Originator: Landsat 7
Title: LANDSAT TM Path 23, Row 31
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: USGS EROS Data Center
Publication_Place: Sioux Falls, South Dakota, USA
Publication_Date: 19991001
Other_Citation_Details:
LANDSAT TM Path 23, Row 31. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

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Source_Information:
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Originator: Landsat 5
Title: LANDSAT TM Path 23, Rows 32, 33 and 34
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Space Imaging EOSAT
Publication_Place: Thornton, Colorado, USA
Publication_Date: 20001001
Other_Citation_Details:
LANDSAT TM Path 23, Rows 32, 33, and 34. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

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Source_Information:
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Originator: Landsat 7
Title: LANDSAT TM Path 23, Rows 32, 33 and 34
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: USGS EROS Data Center
Publication_Place: Sioux Falls, South Dakota, USA
Publication_Date: 20001001
Other_Citation_Details:
LANDSAT TM Path 23, Rows 32, 33 and 34. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

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Originator: Landsat 5
Title: LANDSAT TM Path 24, Row 31
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Space Imaging EOSAT
Publication_Place: Thornton, Colorado, USA
Publication_Date: 19991001
Other_Citation_Details:
LANDSAT TM Path 24, Row 31. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

Source_Scale_Denominator: 100000
Type_of_Source_Media: CD-ROM
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Source_Currentness_Reference: ground condition
Source_Contribution: Raw data used in land cover spectral signature analysis.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Landsat 5
Title: LANDSAT TM Path 24, Row 32
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Space Imaging EOSAT
Publication_Place: Thornton, Colorado, USA
Publication_Date: 19991001
Other_Citation_Details:
LANDSAT TM Path 24, Row 32. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

Source_Scale_Denominator: 100000
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19990828
Source_Currentness_Reference: ground condition
Source_Contribution: Raw data used in land cover spectral signature analysis.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Landsat 5
Title: LANDSAT TM Path 24, Row 33
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Space Imaging EOSAT
Publication_Place: Thornton, Colorado, USA
Publication_Date: 20001001
Other_Citation_Details:
LANDSAT TM Path 24, Row 33. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

Source_Scale_Denominator: 100000
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20000502
Single_Date/Time:
Calendar_Date: 20000907
Source_Currentness_Reference: ground condition
Source_Contribution: Raw data used in land cover spectral signature analysis.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Landsat 7
Title: LANDSAT TM Path 24, Row 33
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Space Imaging EOSAT
Publication_Place: Thornton, Colorado, USA
Publication_Date: 20001001
Other_Citation_Details:
LANDSAT TM Path 24, Row 33. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

Source_Scale_Denominator: 100000
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20001001
Source_Currentness_Reference: ground condition
Source_Contribution: Raw data used in land cover spectral signature analysis.
Source_Information:
Source_Citation:
Citation_Information:
Originator: National Aerial Photography Program (NAPP)
Title: NAPP aerial photographs
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Aerial Photography Field Office (AFPO)
Publication_Place: Salt Lake City, Utah, USA
Publication_Date: variable
Other_Citation_Details:
Additional information about NAPP can be obtained from the following internet site: <http://edc.usgs.gov/glis/hyper/guide/napp>
Source_Scale_Denominator: 8000
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: variable
Source_Currentness_Reference: ground condition
Source_Contribution: spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: Illinois Department of Conservation
Title: Illinois Natural Areas Inventory Technical Report
Publication_Information:
Publisher: Illinois Department of Conservation
Publication_Place: Springfield, Illinois
Publication_Date: 197811
Other_Citation_Details:
Appendix 30. pp. 310-405. Classification of Natural Communities in Illinois. John White and Michael H. Madany.
Type_of_Source_Media: paper; text
Source_Time_Period_of_Content:
Source_Currentness_Reference: publication date
Source_Contribution: attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: Landsat 5
Title: LANDSAT TM Path 24, Rows 31 and 32
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Space Imaging EOSAT
Publication_Place: Thornton, Colorado, USA
Publication_Date: 19991001
Other_Citation_Details:
LANDSAT TM Path 24, Rows 31 and 32. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

Source_Scale_Denominator: 100000
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19990430
Source_Currentness_Reference: ground condition
Source_Contribution: Raw data used in land cover spectral signature analysis.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Landsat 7
Title: LANDSAT TM Path 24, Rows 31 and 32
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publisher: Space Imaging EOSAT
Publication_Place: Thornton, Colorado, USA
Publication_Date: 19991001
Other_Citation_Details:
LANDSAT TM Path 24, Rows 31 and 32. 30 meter by 30 meter pixel resolution, EOSAT Fast Format.

Additional information about Landsat 5 and Landsat 7 satellite imagery can be obtained from the United States Geological Survey (USGS) EROS Data Center.

Source_Scale_Denominator: 100000
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19990929
Source_Currentness_Reference: ground condition
Source_Contribution: Raw data used in land cover spectral signature analysis.
Process_Step:
Process_Description:
Ten Landsat TM/ETM+ scenes which cover the state of Illinois were ordered with three dates of each scene. The three dates of each scene from spring-summer-fall were layer stacked to make one image composed of 18 bands. The satellite imagery for four of the TM scene areas was acquired in 1999, and the remaining six scene areas were acquired in 2000.
Process_Date: 20001001
Process_Step:
Process_Description:
All of the TM/ETM+ satellite imagery were geometrically corrected and co-registered to a transverse Mercator projection with a UTM zone 16 grid and NAD83 datum. The 1999 TM/ETM+ imagery is a mixture of simple geometric correction and terrain correction, while all of the 2000 imagery was terrain corrected using USGS 3 arc-second digital elevation model (DEM) data to correct relief displacement.
Process_Date: 20001101
Process_Step:
Process_Description:
250 spectral classes were derived using an unsupervised classification. The labeling and reduction of the spectral classes from the unsupervised classification procedures into the final information classes (water, wetland, etc.) was accomplished by photo-interpretation of NAPP 3 aerial photography.
Process_Date: 20001201
Process_Step:
Process_Description:
The supervised classification of agricultural lands, which used USDA-NASS ground reference data as training data collected the same year for 425 sites across the state, directly resulted in information classes and therefore no additional class labeling was necessary.
Process_Date: 20010101
Process_Step:
Process_Description:
After class labeling was finished, forests were made into a raster mask. These masks pulled the 18 band raw data from each of the ten scenes. Slope Aspect Index (SAI) of the Digital Elevation Model (DEM) was added to the raw data within the forested areas to make 19 bands. The SAI was used to distinguish between upland and floodplain forests. The raw data was then classified to match the forest communities of the Natural Areas Inventory of Illinois, Classification of Natural Communities in Illinois. The Soil Surveys of each county were used as ancillary data to help determine the community level classes.
Process_Date: 20010601
Process_Step:
Process_Description:
Masks were made of the wetlands areas. The wetland delineation was accomplished through a combination of unsupervised classification of same year, spring-summer-fall Landsat TM/ETM+ imagery and photo-interpretation of 1998-1999 U.S. Geological Survey (USGS) National Aerial Photography Program (NAPP 3) photographic prints.
Process_Date: 20010701
Process_Step:
Process_Description:
Upon completion of the integrated classifications for each of the ten TM Path/Row scene areas, a seamless mosaic was created using image processing software developed by the USDA-NASS. Careful attention was made to develop the mosaic along county boundaries to ensure that the land cover information within each county area was derived from the same Landsat TM/ETM+ triplicate. Non-Agricultural classes were derived from an unsupervised classification and visual interpretation by analysts was made to determine categories.
Process_Date: 20021001

Logical_Consistency_Report:
The accuracy of the agricultural land cover classifications are evaluated using the extensive training data collected in the annual NASS June Agricultural Survey (JAS). The accuracy of the non-agricultural land cover classifications are evaluated using a stratified random sample of points and interpreted through aerial photographs.
Completeness_Report: The entire state of Illinois is included in this data set.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The categorized images are co-registered to EarthSat Inc's ortho-rectified GeoCover Stock Mosaic images using automated block correlation techniques. The block correlation is run against band two of each original raw satellite image and band two of the GeoCover Stock Mosaic. The resulting correlations are applied to each categorized image, and then added to a master image or mosaic using PEDITOR. The EarthSat images were chosen as they provide the best available large area ortho-rectified images as a basis to register large volume Landsat images with.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 50 meters root mean squared error overall
Horizontal_Positional_Accuracy_Explanation:
The GeoCover Stock Mosaics are within 50 meters root mean squared error overall. See EarthSat's <http://www.geocover.com/> website for further details.

Cloud_Cover: 10 <=


Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: Illinois
Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 21140

Column_Count: 11830

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 16 North
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -87
Latitude_of_Projection_Origin: 0
False_Easting: 500000
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 30
Ordinate_Resolution: 30
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: NAD 83
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.00

Denominator_of_Flattening_Ratio: 298.257223563

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Detail_Citation:
Data Dictionary: Illinois Natural History Survey's 1999-2000 1:100 000 Scale Illinois Gap Analysis Land Cover Classification, Raster Digital Data, Version 2.0, September 2003.

 Data Dictionary: Illinois Natural History Survey's 1999-2000
 1:100 000 Scale Illinois Gap Analysis Land Cover Classification,
 Raster Digital Data, Version 2.0, September 2003

 ILGAPVEG.VAT:

 COLUMN ITEM NAME        WIDTH OUTPUT  TYPE N.DEC

   1     VALUE              4    10     B     -
   5     COUNT              4    10     B     -
   9     RED                8    12     F     3
  17     GREEN              8    12     F     3
  25     BLUE               8    12     F     3
  33     OPACITY            8    12     F     3
  41     PRINCIPAL         32    32     C     0
  73     LCOI_99-00        32    32     C     0
 105     IL-GAP            32    32     C     0
 137     CLASS_NAMES       80    80     C     0
 217     IL-GAP_ABBR       32    32     C     0

 VALUE
 Attribute Definition: A numeric code associated with each land cover
                       category.
 Attribute Definition Source: User
 Attribute Domain Values:
   Range Domain: > 0

 COUNT
 Attribute Definition: The count of the number of 30-meter pixels in
                       the data set that are associated with the
                       entry in the VALUE column.
 Attribute Definition Source: User
 Attribute Domain Values:
   Range Domain: > 0

 RED
 Attribute Definition: The brightness value
 Attribute Definition Source: ERDAS
 Attribute Domain Values:
   Range Domain: > 0 < 255

 GREEN
 Attribute Definition: The brightness value
 Attribute Definition Source: ERDAS
 Attribute Domain Values:
   Range Domain: > 0 < 255

 BLUE
 Attribute Definition: The brightness value
 Attribute Definition Source: ERDAS
 Attribute Domain Values:
   Range Domain: > 0 < 255

 OPACITY
 Attribute Definition: The measure of how opaque, or solid a color is
                       displayed in the raster layer.
 Attribute Definition Source: ERDAS
 Attribute Domain Values:
   Range Domain: > 0 < 1

 PRINCIPAL
 Attribute Definition: The principal land cover category
 Attribute Definition Source: User
 Attribute Domain Values:
   Codeset Domain: "10" = Agricultural land
                   "20" = Forested Land
                   "30" = Urban & built-up land
                   "40" = Wetland
                   "50" = Other
                   "51" = Surface Water
                   "52" = Barren and exposed land

 LCOI_99-00
 Attribute Definition: Land cover middle-category numbers
 Attribute Definition Source: User
 Attribute Domain Values:
   Codeset Domain: "O" = No middle-category number
                  "11" = AGRICULTURAL LAND: Corn
                  "12" = AGRICULTURAL LAND: Soybeans
                  "13" = AGRICULTURAL LAND: Winter Wheat
                  "14" = AGRICULTURAL LAND: Other Small Grains and Hay
                  "15" = AGRICULTURAL LAND: Winter Wheat/Soybeans
                  "16" = AGRICULTURAL LAND: Other Agriculture
                  "17" = AGRICULTURAL LAND: Rural Grassland
                  "21" = FORESTED LAND: Upland
                  "25" = FORESTED LAND: Partial Canopy/Savanna Upland
                  "26" = FORESTED LAND: Coniferous
                  "31" = URBAN AND BUILT-UP LAND: High Density
                  "32" = URBAN AND BUILT-UP LAND: Low/Medium Density
                  "35" = URBAN AND BUILT-UP LAND: Urban Open Space
                  "41" = WETLAND: Shallow Marsh/Wet Meadow
                  "42" = WETLAND: Deep Marsh
                  "43" = WETLAND: Seasonally/Temporarily Flooded
                  "44" = WETLAND: Floodplain Forest
                  "48" = WETLAND: Swamp
                  "49" = WETLAND: Shallow Water
                  "51" = OTHER: SURFACE WATER
                  "52" = OTHER: BARREN AND EXPOSED LAND
                  "53" = OTHER: Clouds
                  "54" = OTHER: Cloud Shadows

 NOTE: LCOI_99-00 is different from IL-GAP in three categories only: 21
       (FORESTED LAND: Upland), 32 (URBAN AND BUILT-UP LAND: Low/Medium
       Density (which covers the whole state)) and 44 (WETLAND:
       Floodplain Forest).

 IL-GAP
 Attribute Definition: Illinois GAP land cover category numbers
 Attribute Definition Source: User
 Attribute Domain Values:
   Codeset Domain: "11" = AGRICULTURAL LAND: Corn
                   "12" = AGRICULTURAL LAND: Soybeans
                   "13" = AGRICULTURAL LAND: Winter Wheat
                   "14" = AGRICULTURAL LAND: Other Small Grains and
                          Hay
                   "15" = AGRICULTURAL LAND: Winter Wheat/Soybeans
                   "16" = AGRICULTURAL LAND: Other Agriculture
                   "17" = AGRICULTURAL LAND: Rural Grassland
                   "22" = FORESTED LAND: Upland: Dry
                   "23" = FORESTED LAND: Upland: Dry-Mesic
                   "24" = FORESTED LAND: Upland: Mesic
                   "25" = FORESTED LAND: Partial Canopy/Savanna
                          Upland
                   "26" = FORESTED LAND: Coniferous
                   "31" = URBAN AND BUILT-UP LAND: High Density
                   "32" = URBAN AND BUILT-UP LAND: Low/Medium Density
                          (excluding TM Scene 2331)
                   "33" = URBAN AND BUILT-UP LAND: Low/Medium Density:
                          Medium (TM Scene 2331)
                   "34" = URBAN AND BUILT-UP LAND: Low/Medium Density:
                          Low (TM Scene 2331)
                   "35" = URBAN AND BUILT-UP LAND: Urban Open Space
                   "41" = WETLAND: Shallow Marsh/Wet Meadow
                   "42" = WETLAND: Deep Marsh
                   "43" = WETLAND: Seasonally/Temporarily Flooded
                   "45" = WETLAND: Floodplain Forest: Mesic
                   "46" = WETLAND: Floodplain Forest: Wet-Mesic
                   "47" = WETLAND: Floodplain Forest: Wet
                   "48" = WETLAND: Swamp
                   "49" = WETLAND: Shallow Water
                   "51" = OTHER: SURFACE WATER
                   "52" = OTHER: BARREN AND EXPOSED LAND
                   "53" = OTHER: Clouds
                   "54" = OTHER: Cloud Shadows

 CLASS_NAMES
 Attribute Definition: Land cover classifications. This classification
                       represents three semi-hierarchical categories. The
                       first name in capital letters is a Level 1
                       classification, representing major land classes.
                       The second name represents the land cover of
                       Illinois, 99-00 inventory (a pseudo-Level 2). If
                       a third name is listed, this class is a Level 3
                       classification and represents the GAP category.
 Attribute Definition Source: User
 Attribute Domain Values:
   Enumerated Domain: "AGRICULTURAL LAND: Corn"
                      "AGRICULTURAL LAND: Soybeans"
                      "AGRICULTURAL LAND: Winter Wheat"
                      "AGRICULTURAL LAND: Other Small Grains and Hay"
                      "AGRICULTURAL LAND: Winter Wheat/Soybeans"
                      "AGRICULTURAL LAND: Other Agriculture"
                      "AGRICULTURAL LAND: Rural Grassland"
                      "FORESTED LAND: Upland: Dry"
                      "FORESTED LAND: Upland: Dry-Mesic"
                      "FORESTED LAND: Upland: Mesic"
                      "FORESTED LAND: Partial Canopy/Savanna Upland"
                      "FORESTED LAND: Coniferous"
                      "URBAN AND BUILT-UP LAND: High Density"
                      "URBAN AND BUILT-UP LAND: Low/Medium Density
                      (excluding TM Scene 2331)"
                      "URBAN AND BUILT-UP LAND: Low/Medium Density:
                      Medium (TM Scene 2331)"
                      "URBAN AND BUILT-UP LAND: Low/Medium Density:
                      Low (TM Scene 2331)"
                      "URBAN AND BUILT-UP LAND: Urban Open Space"
                      "WETLAND: Shallow Marsh/Wet Meadow"
                      "WETLAND: Deep Marsh"
                      "WETLAND: Seasonally/Temporarily Flooded"
                      "WETLAND: Floodplain Forest: Mesic"
                      "WETLAND: Floodplain Forest: Wet-Mesic"
                      "WETLAND: Floodplain Forest: Wet"
                      "WETLAND: Swamp"
                      "WETLAND: Shallow Water"
                      "OTHER: SURFACE WATER"
                      "OTHER: BARREN AND EXPOSED LAND"
                      "OTHER: Clouds"
                      "OTHER: Cloud Shadows"

 IL-GAP_ABBR
 Attribute Definition: Illinois GAP land cover abbreviations.
 Attribute Definition Source: User
 Attribute Domain Values:
   Codeset Domain: "C" = AGRICULTURAL LAND: Corn
                  "SB" = AGRICULTURAL LAND: Soybeans
                  "WW"	= AGRICULTURAL LAND: Winter Wheat
                "OSGH" = AGRICULTURAL LAND: Other Small Grains and Hay
                "WWSB" = AGRICULTURAL LAND: Winter Wheat/Soybeans
                  "OA" = AGRICULTURAL LAND: Other Agriculture
                  "RG" = AGRICULTURAL LAND: Rural Grassland
                 "DUF" = FORESTED LAND: Upland: Dry
                "DMUF" = FORESTED LAND: Upland: Dry-Mesic
                 "MUF" = FORESTED LAND: Upland: Mesic
                "PCSU" = FORESTED LAND: Partial Canopy/Savanna Upland
                  "CF" = FORESTED LAND: Coniferous
                 "HDU" = URBAN AND BUILT-UP LAND: High Density
                "LMDU" = URBAN AND BUILT-UP LAND: Low/Medium Density
                         (excluding TM Scene 2331)
                 "MDU" = URBAN AND BUILT-UP LAND: Low/Medium Density:
                         Medium (TM Scene 2331)
                 "LDU" = URBAN AND BUILT-UP LAND: Low/Medium Density:
                         Low (TM Scene 2331)
                 "UOS" = URBAN AND BUILT-UP LAND: Urban Open Space
                "SMWM" = WETLAND: Shallow Marsh/Wet Meadow
                  "DM" = WETLAND: Deep Marsh
                "STFW"	= WETLAND: Seasonally/Temporarily Flooded
                 "MFF" = WETLAND: Floodplain Forest: Mesic
                "WMFF" = WETLAND: Floodplain Forest: Wet-Mesic
                 "WFF" = WETLAND: Floodplain Forest: Wet
                   "S"	= WETLAND: Swamp
                 "SWW" = WETLAND: Shallow Water
                   "W" = OTHER: SURFACE WATER
                 "BEL" = OTHER: BARREN AND EXPOSED LAND

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Illinois Natural History Survey
Contact_Person: Patrick Brown
Contact_Address:
Address_Type: mailing and physical address
Address: 607 E. Peabody Drive

City: Champaign
State_or_Province: Illinois (IL)
Postal_Code: 61820
Country: USA
Contact_Voice_Telephone: 217-244-4289
Contact_Facsimile_Telephone: 217-333-4949
Contact_Electronic_Mail_Address: pbrown@mail.inhs.uiuc.edu
Hours_of_Service: 0800-1700 Central Standard Time
Contact_Instructions: email, phone, fax, or mail
Resource_Description:
Illinois Natural History Survey's 1999-2000 1:100 000 Scale Illinois Gap Analysis Land Cover Classification, Raster Digital Data, Version 2.0, September 2003

Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ERDAS
Format_Version_Date: 1999
File_Decompression_Technique: unknown
Transfer_Size: 75
Digital_Transfer_Option:
Online_Option:
Access_Instructions:
This data can be downloaded from this website address: <http://www.agr.state.il.us/gis/index.html>
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 650
Recording_Density_Units: Megabytes
Recording_Format: DOS Copy
Compatibility_Information: Format compatibility is the user's responsibility.
Fees:
This dataset is available free to download. For a CD-ROM version, if there is a cost for this data, it includes transaction and media costs.
Technical_Prerequisites:
The hardware requirements for processing this data set are as follows: for digitizing/ground truth editing, any of the 32 bit Microsoft OS's will work. For computationally intensive jobs including; scene processing, clustering, classification, estimation and "mosaicking" a batch type system is utilized where jobs can be queued on different devices and the minimum requirements are NT/2000/XP.
Available_Time_Period:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2003
Ending_Date: Unknown

Metadata_Reference_Information:
Metadata_Date: 20030523
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Illinois Natural History Survey
Contact_Person: Tari Tweddale
Contact_Address:
Address_Type: mailing address
Address: 607 E. Peabody Dr.
City: Champaign
State_or_Province: Illinois
Postal_Code: 61820
Country: USA
Contact_Voice_Telephone: 217/265-0583
Contact_Facsimile_Telephone: 217/265-0374
Contact_Electronic_Mail_Address: tweicher@uiuc.edu
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata.
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Access_Constraints:
No restrictions on the distribution or use of the metadata file.
Metadata_Use_Constraints:
No restrictions on the distribution or use of the metadata file.

Generated by mp version 2.7.34 on Mon Jun 09 14:56:32 2003