Metadata

fox-county

Frequently-asked questions:

What does this data set describe?
Title:
fox-county

Abstract:

This 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 is only a subset of the original data set. It contains only counties in Illinois in which the Fox River watershed is located.


Supplemental information:

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.


  1. How should this data set be cited?

    Illinois State Geological Survey, 1984, 199803, fox-county: ISGS GIS Database counties, Illinois State Geological Survey, Champaign, Illinois.

  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -89.633845
    East: -87.491836
    North: 42.504568
    South: 40.910414

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar date: 1984
    Currentness reference:

    Data were digitized from USGS 7.5 minute and 15 minute topographic maps available circa 1984. Range of dates of those source maps is unknown.


  5. What is the general form of this data set?

    Geospatial data presentation form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (11)
      • Label point (102)
      • GT-polygon composed of chains (102)
      • Point (8)
      • Label point (102)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      Standard parallel: 33.000000
      Standard parallel: 45.000000
      Longitude of central meridian: -89.500000
      Latitude of projection origin: 33.000000
      False easting: 2999994.000000
      False northing: 0.000000

      Planar coordinates are encoded using coordinate pair.
      Abscissae (x-coordinates) are specified to the nearest 0.001024.
      Ordinates (y-coordinates) are specified to the nearest 0.001024.
      Planar coordinates are specified in survey feet.

      The horizontal datum used is D_Clarke_1866.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.

      Vertical coordinate system definition:
      Altitude system definition:
      Altitude resolution: 0.000010
      Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    fox-county
    FID

    Internal feature number.

     (Source:

    ESRI

    )

    Sequential unique whole numbers that are automatically generated.

    Shape

    Feature geometry.

     (Source:

    ESRI

    )

    Coordinates defining the features.

    AREA

    Internal node number for the beginning of an arc (from-node).

     (Source:

    ESRI

    )

    Whole numbers that are automatically generated.

    PERIMETER

    Internal node number for the end of an arc (to-node).

     (Source:

    ESRI

    )

    Whole numbers that are automatically generated.

    COUNTIES_

    Internal node number for the left polygon.

     (Source:

    ESRI

    )

    Whole numbers that are automatically generated.

    COUNTIES_I

    Internal node number for the right polygon.

     (Source:

    ESRI

    )

    Whole numbers that are automatically generated.

    COUNT_FED_

    Length of feature in internal units.

     (Source:

    ESRI

    )

    Positive real numbers that are automatically generated.

    COUNTY_NAM

    Internal feature number.

     (Source:

    ESRI

    )

    Sequential unique whole numbers that are automatically generated.

    PT

    User-defined feature number.

     (Source:

    ESRI

    )

    ACRES
    RECORDERFE
    FIPS_CO

    Length of feature in internal units.

     (Source:

    ESRI

    )

    Positive real numbers that are automatically generated.

    FIPS

    Area of feature in internal units squared.

     (Source:

    ESRI

    )

    Positive real numbers that are automatically generated.

    CO_FIPS
    COUNTLINE
    SECLINE
    INDLINE
    TOWNLINE
    SYMB
    counties.pat
    FID

    Internal feature number.

     (Source:

    ESRI

    )

    Sequential unique whole numbers that are automatically generated.

    Shape

    Feature geometry.

     (Source:

    ESRI

    )

    Coordinates defining the features.

    AREA

    Area of feature in internal units squared.

     (Source:

    ESRI

    )

    Positive real numbers that are automatically generated.

    PERIMETER

    Perimeter of feature in internal units.

     (Source:

    ESRI

    )

    Positive real numbers that are automatically generated.

    COUNTIES#

    Internal feature number.

     (Source:

    ESRI

    )

    Sequential unique whole numbers that are automatically generated.

    COUNTIES-ID

    User-defined feature number.

     (Source:

    ESRI

    )

    COUNT-FED-FIPS
    COUNTY_NAME
    PT
    ACRES
    RECORDERFEE
    FIPS_CO
    FIPS
    CO_FIPS
    Entity and attribute overview:

    Attribute items are in typical ARC/INFO feature class format. ARC ATTRIBUTES: Arc attributes indicate line type. While Arc attributes exist in "coverage" format, they may not exist in "geodatabase" format. 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.


    Entity and attribute detail citation:

    none

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Who produced the data set?
  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

    • Illinois State Geological Survey

  2. Who also contributed to the data set?

    >GIS Processing: ISGS Staff, C. Abert, D. Nelson >Documentation: D. Nelson and S. Beaverson >Quality Control: ISGS Staff, D. Nelson


  3. To whom should users address questions about the data?

    Curtis Abert
    Illinois State Geological Survey
    Geologist/GIS Analyst

    615 East Peabody Drive

    Champaign, Illinois 61820
    USA

    217-244-2188 (voice)
    217-333-2830 (FAX)
    abert@flanders.isgs.uiuc.edu
    Hours of Service: 8:00 a.m. - 5:00 p.m., Monday-Friday
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Why was the data set created?

This data set was created during Fox River Watershed Investigation project. 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.


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How was the data set created?
  1. Where did the data come from?

    none (source 1 of 1)

    United States Geological Survey, unknown, various - 7.5 minute and 15 minute topographic quadrangles depicting Illinois county boundaries: Topographic quadrangles Those which depicted a portion of the Illinois county boundaries at time of automation (1984)..

    Type of source media: paper
    Source scale denominator: 24000 and 62500
    Source contribution:

    Lines depicting Illinois county boundaries


  2. What changes have been made?

    Date: 1984 (change 1 of 9)

    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.


    Date: 199803 (change 2 of 9)

    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.


    Date: 19990506 (change 3 of 9)

    Added ITEM GISDB-DIR which contains the directory name for the various counties. For internal use only. Non-ISGS staff can ignore this item.


    (change 4 of 9)

    Metadata imported.


    Data sources used in this process:
    • D:\DOCUME~1\gisadmin\LOCALS~1\Temp\xml35.tmp

    (change 5 of 9)

    Metadata imported.


    Data sources used in this process:
    • D:\DOCUME~1\gisadmin\LOCALS~1\Temp\xml17B.tmp

    (change 6 of 9)

    Metadata imported.


    Data sources used in this process:
    • D:\DOCUME~1\gisadmin\LOCALS~1\Temp\xml188.tmp

    (change 7 of 9)

    Dataset copied.


    (change 8 of 9)

    Dataset moved.


    Data sources used in this process:
    • D:\Documents and Settings\cpher\My Documents\gis\data\fox\finalized data\fox-county

    (change 9 of 9)

    Dataset copied.


    Data sources used in this process:
    • S:\ilrdss\fox\fox-county

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How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?

    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.


  2. How accurate are the geographic locations?

    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.


  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    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.


  5. How consistent are the relationships among the observations, including topology?

    A logical consistency review was performed in March, 1998. The following checks were made: Data set was DESCRIBED and coverage files listed to determine the feature types present. In this data set, the following feature types were found and checked: polygons, arcs, labels, nodes, and annotations. The presence of spatial indices was also checked. For PAT and AAT files, each ITEM was checked for the following: - DOMAIN of allowable values - adherence of values to the DOMAIN - definition of ITEMS - requirement of all UNIQUE values for an item - logic of ITEMS REDEFINED over other ITEMS - length of ITEM name as regards conversion to shape file BUILD statuses of data sets were checked, as were LABELERRORS and NODEERRORS (where appropriate), and PROJECTION definition. The presence of a BND file was verified. The presence and location of TICS were checked. Polygon and chain-node topology present. There are no dangling arcs. There is one polygon label per polygon, except for universe polygon. Boundary values appropriate for map projection and map units. "Fuzzy" tolerance is suitable for a nominal scale. 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 process steps for March, 1998. There are no attribute values outside the appropriate domains.


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How can someone get a copy of the data set?
Are there legal restrictions on access or use of the data?

Access constraints: none
Use constraints:

Reproduction 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.


Distributor 1 of 1

  1. Who distributes the data set?

    Illinois State Geological Survey
    Database Administrator

    615 East Peabody Drive

    Champaign, Illinois 61820
    USA

    217-333-5102 (voice)
    217-333-2830 (FAX)
    denhart@geoserv.isgs.uiuc.edu
    Hours of Service: 8:00 a.m. - 5:00 p.m., Monday-Friday

  2. What's the catalog number I need to order this data set?

    An 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.)

  3. What legal disclaimers am I supposed to read?

    The Illinois Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of DNR, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by DNR.


  4. How can I download or order the data?

    • Availability in digital form:


      • Data format:

      		 Size: 0.107

  5. Is there some other way to get the data?

  6. What hardware or software do I need in order to use the data set?

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Who wrote the metadata?
Dates:
Last modified: 20040303
Last reviewed: 19980331
To be reviewed: 200003

Metadata author:
Curtis Abert
Illinois State Geological Survey

615 East Peabody Drive

Champaign, Illinois 61820
USA

217-244-2188 (voice)
217-333-2830 (FAX)
abert@flanders.isgs.uiuc.edu
Hours of Service: 8:00 a.m. - 5:00 p.m., Monday-Friday

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:
  • http://www.esri.com/metadata/esriprof80.html

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