Illinois State Geological Survey1984, 03dnr.DNRGIS.counties1.2vector digital dataISGS GIS DatabasecountiesChampaign, IllinoisIllinois State Geological Surveywithheldwithheldwithheldwithhelddnr.DNRGIS.countiesThis is an Arc/Info polygon and arc data set containing county
boundaries in Illinois. Some county boundaries are also state
boundary lines, Indian treaty boundary lines, township and range
lines, or section boundaries and are identified as such.
County polygons are labeled with county name and FIPS
designation. Nominal scale is 1:62,500.This data set was created to serve as base map information
at scales of 1:62,500 or smaller. These data are appropriate for
use in local and regional thematic analysis. Data are not appropriate
as a geodetic or engineering base.
Updates to the data: Edition 1.0 of these data were reviewed for
internal logical consistency in March, 1998. As a result, several
unneeded .AAT and .PAT items were dropped, tics were replaced,
three dangling arcs were corrected and COVER-ID values were
recalculated to be unique. See logical consistency report and
process steps for March, 1998 for more details. The updated data
set was edition 1.1. This edition (1.2) includes a new polygon ITEM
(GISDB_DIR) added on 19990506.
en198484Data were digitized from USGS 7.5 minute and 15 minute
topographic maps available circa 1984. Range of dates
of those source maps is unknown.As needed-91.586034-87.38025442.51368136.9542562718293.1320453852470.6360114047560.9819026066525.789117ESRI Geography Network Thesauruspublic land surveypublic land surveypublic land surveypublic land surveyNoneIllinoisnoneReproduction 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.Curtis AbertIllinois State Geological SurveyGeologist/GIS Analystmailing
615 East Peabody Drive
ChampaignIllinois61820USA217-244-2188217-333-2830abert@flanders.isgs.uiuc.edu8:00 a.m. - 5:00 p.m., Monday-Friday
>GIS Processing: ISGS Staff, C. Abert, D. Nelson
>Documentation: D. Nelson and S. Beaverson
>Quality Control: ISGS Staff, D. Nelson
ESRI ArcCatalog 9.2.4.1420Illinois State Geological Survey1984, 199803Illinois Public Land Survey SystemmapISGS GIS Databasere-state1Champaign, IllinoisIllinois State Geological SurveywithheldIllinois State Geological Survey1984, 199803State Line Boundary of IllinoismapISGS GIS DatabasestateChampaign, IllinoisIllinois State Geological SurveywithheldIllinois State Geological Survey1984, 199803Township Lines of IllinoismapISGS GIS DatabasetownshipsChampaign, IllinoisIllinois State Geological SurveywithheldIllinois State Geological Survey1984, 199803Township Center Points of IllinoismapISGS GIS DatabasetownptsChampaign, IllinoisIllinois State Geological SurveywithheldIllinois State Geological Survey1984, 199803Indian Treaty Boundary Lines of IllinoismapISGS GIS DatabaseindianlnsChampaign, IllinoisIllinois State Geological SurveywithheldFeature Class
This coverage was extracted from coverage re-state1, the
primary public land survey data set in the ISGS GIS
database. The attributes of that coverage were reviewed
in 1990 using a variety of visual techniques (polygon
shading, line shading and line thicknesses tied to
attribute values) and GIS processing techniques (checking
for logical consistency). See the metadata for re-state1
for a more complete description of this review. There is
no quantitative assessment of attribute accuracy available,
however, this coverage has been used extensively by ISGS
personnel since 1984, and it can be assumed most attribute
errors have been detected and corrected. There are no arc,
polygon or annotation attribute values outside the
appropriate value domains.
ESRI feature type: Simple, Geometry: Polygon, Topology: In 1995, the state boundary along the Ohio River was
officially changed, but these changes have not been
incorporated. Also, this coverage does not include
the portion of the state boundary that extends into
Lake Michigan. Rather, the lake shore is depicted as
the state boundary.
Horizontal positional accuracy is spot verified by visual comparison
of source and hard-copy plots. Arcs within line-width of source maps
are deemed acceptable. For positional accuracy of source maps,
contact the USGS.
United States Geological Surveyunknown
various - 7.5 minute and 15 minute topographic quadrangles
depicting Illinois county boundaries
mapTopographic quadrangles
Those which depicted a portion of the Illinois
county boundaries at time of automation (1984).
24000 and 62500paperunknownunknownpublication datenoneLines depicting Illinois county boundaries
This is a legacy data set compiled circa 1984. It is assumed
that the automation process was typical of that for Arc/Info
geo-data sets, implying digitization from source maps, editing
and error checking, building topology, and subsequent revision
and update. This coverage was extracted from parent coverage
re-state1. See metadata for re-state1. Specific process
descriptions prior to 1997 are unavailable, other than those
listed in the associated Arc/Info log file.
1984
An internal logical consistency check was performed in March, 1998.
See entry for logical consistency. As a result, the following
changes/updates were made to the data:
TICS - The data set had eight tics along the northern border of the
state. For better tic distribution, these were replaced with ten
tics from *path_name_suppressed*/quad100, evenly distributed around
the state. However, users needing registration tics for use with
these data (or a subset of these data) should expect to create
a task-specific tic set, usually based on section corners.
REMOVAL OF ITEMS - The following empty .AAT items were
dropped: STATE2C.OLD#, STATE2C.OLD-ID, ORIG-ID, SYMBOL, SYMB.
UNIQUE COVER-ID VALUES - COVER-ID values in the .AAT and .PAT
were calculated to equal (COVER# - 1) in order to make them
unique.
DANGLES - These DANGLES were corrected by removing 2 spurious arcs:
> Dangling Node 29 at ( 3414662.00000, 3153298.00000)
> Dangling Node 30 at ( 3414678.50000, 3153298.50000)
> Dangling Node 107 at ( 2862288.00000, 2578612.00000)
(The ID numbers in this paragraph refer to edition 1.0 of the data,
not the current edition. For verification, see the archived data
set in *path_name_suppressed*/illimap_v1_0.)
For detailed review see *path_name_suppressed*/illimap_v1_0_rev.txt.
199803
Added ITEM GISDB-DIR which contains the directory name for the
various counties. For internal use only. Non-ISGS staff can
ignore this item.
19990506Metadata imported.withheld20060725Dataset copied.withheld2010032310554300Dataset copied.withheld2010032310585900VectorG-polygon102String347GT-polygon composed of chains103SimplePolygonFALSE102TRUEFALSEcoordinate pair0.0009870.000987survey feetTransverse Mercator0.999853-89.50000036.6666673280833.3333333937000.000000North American Datum of 1983Geodetic Reference System 806378137.000000298.257222GCS_North_American_1983Illinois State Transverse_MercatorExplicit elevation coordinate included with horizontal coordinates1.000000
> Attribute items are in typical ARC/INFO feature class format.
>
> ARC ATTRIBUTES:
> Arc attributes indicate line type. Attribute items other than
> the Arc/Info defaults are:
>
> STATELINE - Indicates if arc is a part of the state boundary
> 1 - arc is part of the state boundary
> 0 - arc is not part of the state boundary
>
> COUNTLINE - Indicates if arc is a part of a county boundary
> 1 - arc is part of a county boundary
> 0 - arc is not part of a county boundary
>
> SECLINE - Indicates if arc is a part of a section line
> 1 - arc is part of a section line
> 0 - arc is not part of a section line
>
> INDLINE - Indicates if arc is a part of an Indian Treaty boundary
> 1 - arc is part of a an Indian Treaty boundary
> 0 - arc is not part of an Indian Treaty boundary
>
> TOWNLINE - Indicates if arc is a part of a township or range line
> 1 - arc is part of a township or range line
> 0 - arc is not part of a township or range line
>
> POLYGON ATTRIBUTES:
> Polygon attributes indicate federal FIPS codes and the
> county name for each county. Polygon items other than
> the Arc/Info defaults are:
>
> COUNT-FED-FIPS - the 6 digit federal FIPS code for state and county
>
> COUNTY_NAME - 16 character name of the county
>
> GISDB_DIR - The name of the directory in the ISGS GIS database
> that contains data for the particular county. This
> item is for internal use only. Non-ISGS staff can
> ignore this item.
>
> ** REDEFINED ITEMS **
> CO_FIPS - the 3 digit FIPS code for the county
>
> ANNOTATION ATTRIBUTES:
> The county name for each county is annotated just below (in most
> cases) the northern county boundary. In some cases placement has
> been adjusted for a good fit.
nonednr.DNRGIS.countiesFeature Class102OBJECTIDOBJECTIDOID4100Internal feature number.ESRISequential unique whole numbers that are automatically generated.AREA_AREA_Double8388PERIMETERPERIMETERDouble8388COUNTIES_COUNTIES_Integer4100COUNTIES_IDCOUNTIES_IDInteger4100COUNT_FED_FIPSCOUNT_FED_FIPSInteger4100COUNTY_NAMECOUNTY_NAMEString1600GISDB_DIRDIRString1600CO_FIPSCO_FIPSSmallInteger250SHAPEShapeGeometry400Feature geometry.ESRICoordinates defining the features.SHAPE.areaSHAPE.areaDouble000SHAPE.lenSHAPE.lenDouble000Geologist/GIS Analystmailing
615 East Peabody Drive
ChampaignIllinois61820USA217-244-2188217-333-2830abert@flanders.isgs.uiuc.edu8:00 a.m. - 5:00 p.m., Monday-FridayAn Arc/Info .e00 (export) file is currently available free of charge
at the Illinois Natural Resources Geospatial Data Clearinghouse.
Refer to the Citation Information portion of this file for access
to downloadable data and metadata, and a visual (GIF image)
representation of the data.
Shift-click to download the data set and related documentation.
(Data and metadata offered separately, please download both files.)The information depicted in this GIS layer is the result of digital analyses performed on a database consisting of information from a variety of governmental and other credible sources. The accuracy of the information presented is limited to the collective accuracy of the database on the date of the analysis. The information is believed accurate and reasonable efforts have been made to ensure the accuracy of the data. However, the expressly disclaims responsibility for damages or liability that may arise from use of this data. This product is the property of the and its use is thereby restricted.ESRI data format, dependent upon requestTo be determined at time of order2007112019980331200003Curtis AbertIllinois State Geological Surveymailing
615 East Peabody Drive
ChampaignIllinois61820USA217-244-2188217-333-2830abert@flanders.isgs.uiuc.edu8:00 a.m. - 5:00 p.m., Monday-FridayGeologist/GIS AnalystFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998nonenoneenlocal timehttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile2012101708092500FALSE200711201602070020071120160819001.0ESRI ArcCatalog 9.2.4.1420dnr.DNRGIS.counties2718293.1320453852470.6360116066525.7891174047560.9819021-91.586034-87.38025442.51368136.9542561This is an Arc/Info polygon and arc data set containing county
boundaries in Illinois. Some county boundaries are also state
boundary lines, Indian treaty boundary lines, township and range
lines, or section boundaries and are identified as such.
County polygons are labeled with county name and FIPS
designation. Nominal scale is 1:62,500.This data set was created to serve as base map information
at scales of 1:62,500 or smaller. These data are appropriate for
use in local and regional thematic analysis. Data are not appropriate
as a geodetic or engineering base.countiesISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002withheldESRI data format, dependent upon request9.2Geologist/GIS Analyst615 East Peabody DriveChampaignIllinois61820abert@flanders.isgs.uiuc.edu217-244-2188217-333-2830Illinois State Transverse_Mercator10220071120Geologist/GIS Analyst615 East Peabody DriveChampaignIllinois61820abert@flanders.isgs.uiuc.edu217-244-2188217-333-2830