Data_Set_History: 1. Each county's coverages for the features roads, hydrography, railways and
county boundaries were projected from the State Plane coordinate system (using the zone or
FIPS Zone Code as described in the source coverage) to UTM Zone 15.
2. Polygon topology was built for the county boundary coverages and arc topology for the
roads, hydro and rail coverages.
3. Each of the 4 features was appended into a single coverage covering all the counties using
the `poly' and `all' options for the county boundaries coverage and the `arc' and `all' options
for the remaining 3 coverages. Polygon topology for the counties coverage was reconstruct-
ed using `clean'.
4. An item titled `cnty_name' was added to the counties coverage and filled with the county
names.
5. Coverages were exported using the `none' option for no compression.
Metadata_Date: 11/93
Illinois River UTM zone 15
Data_Set_Identity: 1993 Midwest Flooding Emergency Management Data--llinois River
Theme_Keywords: Roads, Rail, Hydrography, County Boundaries, Inundation
Data_Set_Description: This data set includes the roads, hydrography, railways, and county
boundaries along the lower Illinois River.
Data_Structure: Vector
Data_Set_Extent: Illinois - Calhoun, Greene, Jersey, Pike, Scott Counties
Grid_Coordinate_System: Universal Transverse Mercator
UTM_Zone_Number: 15
Horizontal_Datum: NAD83
Ellipsoid: GRS80
Coordinate_Precision: Single
Transfer_Format: ARC/INFO Export 6.1
Contact_Organization: USACE Remote Sensing/GIS Center
Contact_Person: Dr. Joyce Nagle, Civil Engineer
Contact_Mailing_Address: 72 Lyme Road, Hanover, NH 03755-1290
Contact_Telephone: (603)646-4100
Contact_Email: nagle@crrel41.crrel.usace.army.mil
Custodial_Liability: Custodian does not assume liability
Roads, Rail, and Hydrography Source Information:
Source_Name: USGS DLG-3; obtained as ARC/INFO coverages from Frank D'Erchia at U.S.
Fish & Wildlife Service Environmental Management Technical Center, Onalaska, WI
Bibliographic_Reference: Digital Line Graphs from 1:100,000-Scale Maps, Data Users Guide 2;
1989; United States Dept. of the Interior, US Geological Survey; Reston, VA
Source_Scale: 100000
Creator_Of_Source: U.S. Geological Survey, National Mapping Division
County Boundary Source Information:
Source_Name: USGS. Digital data obtained from USACE Rock Island District in ARC/INFO for-
mat, UTM NAD27. Digitized by another source off quad maps.
Bibliographic_Reference: None
Source_Scale: 24000
Creator_Of_Source: U.S. Geological Survey, National Mapping Division
Data_Set_History:
Roads, Hydrography, Railways:
1. Imported by quad, appended and edgematched to obtain final coverage.
2. Projected from NAD27 to NAD83.
3. Exported using no compression.
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