Contact_Organization: USACE Remote Sensing/GIS Center
Contact_Person: Dr. Joyce Nagle, Civil Engineer
Contact_Mailing_Address: 72 Lyme Road, Hanover, NH 03755-1290
Custodial_Liability: Custodian does not assume liability
Roads, Hydrography, and Rail 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 (EMTC), 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
Creator_Of_Source: U.S. Geological Survey, National Mapping Division
County Boundary Source Information:
USGS Quad Boundary Source Information:
Roads, Hydrography, Railways:
1. Imported by quad, appended and edgematched to obtain final coverage (performed at
2. Projected from NAD27 to NAD83.
3. Converted to DLG-3 using the `arcdlg' command. Just prior to conversion, items of type
integer titled `major1' and `minor1' were added to the coverages to allow conversion of at-
tribute information. Information was encoded into the major1 item only. The integers corre-
spond to the number segment of the CFCC classification described in the TIGER/Line refer-
ence. Road features are in classification `A', hydro in `H' and rail in `B'.
1. Projected from NAD27 to NAD83.
2. Converted to DLG-3 using the arcdlg command. Major1 and minor1 items were added as
above and the major1 item filled with integers corresponding to the county names as fol-
601=Washington MN, 618=St. Croix WI, 629=Ramsey MN, 617=Hennepin
640=Carver MN, 642=Dakota MN, 655=Pierce WI, 665=Scott MN, 681=Pepin WI, 696=Trem-
pealeau WI, 697=Buffalo WI, 679=Goodhue MN, 726=Wabasha MN, 771=Winona MN,
792=La Crosse WI, 836=Houston MN, 857=Vernon WI, 892=Allamakee IA, 904=Crawford
WI, 933=Grant WI, 969=Clayton IA, 1036=Dubuque IA, 1065=Jo Daviess IL, 1094=Jackson
IA, 1164=Clinton IA, 1216=Rock Island IL, 1219=Scott IA, 1260=Henry IL, 1267=Muscatine
IA, 1312=Louisa IA, 1331=Mercer IL, 1394=Henderson IL, 1396=Des Moines IA, 1459=Lee
IA, 1468=Fulton IL, 1513=Hancock IL, 1530=Clark MO, 1599=Schuyler IL, 1619=Lewis MO,
1631=Adams IL, 1644=Cass IL, 1654=Brown IL, 1699=Marion MO, 1701=Morgan IL,
1722=Pike IL, 1765=Ralls MO, 1807=Greene IL, 1733=Scott IL, 1795=Pike MO, 1853=Calhoun
IL, 1898=Lincoln MO, 1882=Jersey IL, 1968=St. Charles MO, 2012=St. Louis City MO,
1991=St. Louis MO, 2104=Monroe IL,2107=Jefferson MO,2202=Ste. Genevieve MO, 2220=St.
Francois MO, 1121=Carroll IL, 1182=Whiteside IL, 1554=Mason IL, 1796=Macoupin IL,