20190206
17420900
1.0
FALSE
Jersey_Co
002
-91.513032
-87.437932
36.969972
42.508348
1
0.000
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.6.0'><WKT>PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]</WKT><XOrigin>-20037700</XOrigin><YOrigin>-30241100</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102100</WKID><LatestWKID>3857</LatestWKID></ProjectedCoordinateSystem>
WGS_1984_Web_Mercator_Auxiliary_Sphere
20260127
15524100
20260127
15524100
625000
5000
FGDC
Esri ArcGIS 13.6.0.59527
Illinois Counties
vector digital data
2024-10-25T00:00:00
1
-91.513032
-87.437932
42.508348
36.969972
Illinois State Water Survey, a division of the Prairie Research Institute at the University of Illinois at Urbana-Champaign
This is a set of polygons representing the 102 counties of Illinois. They were made to be used as the county boundaries for Illinois's Digital Flood Insurance Rate Maps (DFIRMs).
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This dataset started as a copy of the 2004 Illinois county boundaries from the Illinois State Geological Survey (ISGS). In 2005, ISWS edited the county boundaries to better match the boundaries as seen on georeferenced United States Geological Survey (USGS) </SPAN><SPAN>7.5-Minute Series Topographic Maps</SPAN><SPAN>. Aerial photography was also used to assist in this task. In 2023, all counties along the state boundary with Indiana were edited to match with county boundaries provided by the Indiana DNR. Also in 2023, portions of the boundaries of Lake and McHenry Counties were edited to match with their neighboring Wisconsin counties as seen in FEMA's National Flood Hazard Layer (NFHL). In 2024, Madison, St. Clair, and Monroe counties along the state boundary with Missouri were edited to match with Missouri county boundaries in the effective NFHL.</SPAN></P></DIV></DIV></DIV>
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This dataset was made to be used as the county boundaries for Illinois counties' Digital Flood Insurance Rate Maps (DFIRMs).</SPAN></P></DIV></DIV></DIV>
File Geodatabase Feature Class
0.000
dataset
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6.18.3(9.3.1.2)
0
Simple
FALSE
0
TRUE
FALSE
Jersey_Co
Feature Class
0
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
ST
ST
String
2
0
0
State abbreviation
Name
Name
String
50
0
0
County name
FIPS
FIPS
String
5
0
0
Five digit FIPS code
DFIRM_ID
DFIRM_ID
String
6
0
0
Value for DFIRM_ID fields in FEMA FIRM database
SHAPE
Shape
Geometry
0
0
0
Feature geometry.
ESRI
Coordinates defining the features.
State
State
String
24
0
0
State name
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
Shape_Area
Shape_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
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