PLSS Townships

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Illinois State Geological Survey
Publication_Date: 1984, 199803
Title: plss_townships
Edition: 1.1
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: ISGS GIS Database
Issue_Identification: townships
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher: Illinois State Geological Survey
Online_Linkage: \\DNR-DDH16871\K$\ray\4dvd\putm\plss_townships.shp
Online_Linkage: \\DNR-DDH16871\K$\ray\4dvd\putm\plss_townships.shp
Online_Linkage: \\DNR-DDH16871\K$\ray\4dvd\putm\plss_townships.shp
Online_Linkage: \\DNR-DDH16871\K$\ray\4dvd\putm\plss_townships.shp
Description:
Abstract:
This is an Arc/Info polygon and arc data set that contains township and range lines in Illinois. Individual townships are labeled with meridian, township, and range designations, and with x and y coordinates of the approximate section center point. Nominal scale is 1:62,500.
Purpose:
This data set was created to serve as base map information at scales of 1:62,500 or smaller. Attribute data identify township and range. These data are appropriate for use in local and regional thematic analysis. Data are not appropriate as a geodetic or engineering base.
Supplemental_Information:
Updates to the data: Edition 1.0 of these data were reviewed for internal logical consistency in March, 1998. As a result, one unneeded .PAT items was dropped, tics were replaced, and COVER-ID values were recalculated to be unique. An extra polygon was also removed. See logical consistency report and process steps for March, 1998 for more details. The updated data set (this one) is edition 1.1.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
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.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Every two years
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -91.586034
East_Bounding_Coordinate: -87.380254
North_Bounding_Coordinate: 42.513681
South_Bounding_Coordinate: 36.954256
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: public land survey
Theme_Keyword: township
Theme_Keyword: range
Theme_Keyword: boundaries
Theme_Keyword: illimap
Theme_Keyword: base map
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Illinois
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.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Curtis Abert
Contact_Organization: Illinois State Geological Survey
Contact_Position: Geologist/GIS Analyst
Contact_Address:
Address_Type: mailing address
Address: 615 East Peabody Drive
City: Champaign
State_or_Province: Illinois
Postal_Code: 61820
Country: USA
Contact_Voice_Telephone: 217-244-2188
Contact_Facsimile_Telephone: 217-333-2830
Contact_Electronic_Mail_Address: abert@flanders.isgs.uiuc.edu
Hours_of_Service: 8:00 a.m. - 5:00 p.m., Monday-Friday
Data_Set_Credit:
GIS Processing:  ISGS Staff, C. Abert, D. Nelson
Documentation:   D. Nelson and S. Beaverson
Quality Control: ISGS Staff, D. Nelson
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350
Cross_Reference:
Citation_Information:
Originator: Illinois State Geological Survey
Publication_Date: 1984, 199803
Title: Illinois Public Land Survey System
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: ISGS GIS Database
Issue_Identification: re-state1
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher: Illinois State Geological Survey
Online_Linkage:
Data Set Documentation <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/re-state1.html>
Cross_Reference:
Citation_Information:
Originator: Illinois State Geological Survey
Publication_Date: 1984, 199803
Title: State Line Boundary of Illinois
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: ISGS GIS Database
Issue_Identification: state
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher: Illinois State Geological Survey
Online_Linkage:
Data Set Documentation <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/state.html>
Cross_Reference:
Citation_Information:
Originator: Illinois State Geological Survey
Publication_Date: 1984, 199803
Title: Illinois County Boundaries
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: ISGS GIS Database
Issue_Identification: counties
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher: Illinois State Geological Survey
Online_Linkage:
Data Set Documentation <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/counties.html>
Cross_Reference:
Citation_Information:
Originator: Illinois State Geological Survey
Publication_Date: 1984, 199803
Title: Township Center Points of Illinois
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: ISGS GIS Database
Issue_Identification: townpts
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher: Illinois State Geological Survey
Online_Linkage:
Data Set Documentation <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/townpts.html>
Cross_Reference:
Citation_Information:
Originator: Illinois State Geological Survey
Publication_Date: 1984, 199803
Title: Indian Treaty Boundary Lines of Illinois
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: ISGS GIS Database
Issue_Identification: indianlns
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher: Illinois State Geological Survey
Online_Linkage:
Data Set Documentation <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/indianlns.html>

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
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.
Logical_Consistency_Report:
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 annotation. 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 nominal scale. Several unneeded .AAT and .PAT items were dropped, tics were replaced, and a single polygon was removed. COVER-ID values were recalculated to be unique. See process steps for March, 1998. There are no attribute values outside the appropriate domains.
Completeness_Report:
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.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal positional accuracy is spot verified by manual overlay 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.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: United States Geological Survey
Publication_Date: unknown
Title:
various - 7.5 minute and 15 minute topographic quadrangles depicting Illinois township and range lines
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: Topographic quadrangles
Issue_Identification:
Those which depicted a portion of Illinois township and range lines at time of automation (1984).
Source_Scale_Denominator: 24000 and 62500
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: unknown
Ending_Date: unknown
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: none
Source_Contribution: Lines depicting Illinois township boundaries
Process_Step:
Process_Description:
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.
Process_Date: 1984
Process_Step:
Process_Description:
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. EXTRA POLYGON - An extra polygon was removed. TOWNSHIPS# = 876 in .PAT had TWP = '4 2N 2E'. This polygon should actually be a part of the polygon to the immediate west (RE-STATE1# = 57698, TRS = '4 2N 1E25'). The hardcopy version of the USGS Astoria quad is suspected to be in error - the markings are ambiguous. Meridian, township, range and section designation were verified by D. Nelson and C. Abert using 1997 and 1998 plat map books for Mason and Schuyler Counties. The arc that separated the two polygons (TOWNSHIPS# = 2005, and the associated label, were removed. (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.
Process_Date: 199803
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: C:\DOCUME~1\JKuhlman\LOCALS~1\Temp\xml16A.tmp

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 1764
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 4225
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 1765

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Transverse Mercator
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999853
Longitude_of_Central_Meridian: -89.500000
Latitude_of_Projection_Origin: 36.666667
False_Easting: 3280833.333333
False_Northing: 3937000.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000
Ordinate_Resolution: 0.000000
Planar_Distance_Units: survey feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 0.000122
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: plss_townships
Attribute:
Attribute_Label: RNUM
Attribute:
Attribute_Label: MERIDIAN
Attribute:
Attribute_Label: TOWNSHIP
Attribute:
Attribute_Label: RANGE
Attribute:
Attribute_Label: X_COORD
Attribute:
Attribute_Label: Y_COORD
Attribute:
Attribute_Label: TWP
Attribute:
Attribute_Label: TNUM
Attribute:
Attribute_Label: TOWNNUM
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: SHAPE_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: SHAPE
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: DNR_GIS_PL
Attribute:
Attribute_Label: PLSSTOWN11
Attribute:
Attribute_Label: SHAPE_Leng
Overview_Description:
Entity_and_Attribute_Overview:
 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 meridian, township, range,
 x-coordinates, and y-coordinates.  Polygon items other
 than the Arc/Info defaults are:

 MERIDIAN - The meridian of the township (2, 3, or 4)

 TOWNSHIP - The alphanumeric township identifier (1N-46N, 1S-18S)

 RANGE    - The alphanumeric range identifier (1E-15E, 1W-14W)

 X-COORD  - X Coordinate of the center of the township in Lambert feet

 Y-COORD  - Y Coordinate of the center of the township in Lambert feet

 ** REDEFINED ITEMS **
 TWP     - The condensed meridian, township and range identifier
 TNUM    - The numeric township identifier
 RNUM    - The numeric range identifier
 TOWNNUM - The condensed township and range identifier
 ANNOTATION ATTRIBUTES:
 Annotation attributes indicate the following label items:
 Township identification grid
 Range identification grid
 A text label is given for each Principle Meridian
 A text label is given for each Base Line
Entity_and_Attribute_Detail_Citation: none

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Illinois State Geological Survey
Contact_Position: Database Administrator
Contact_Address:
Address_Type: mailing address
Address: 615 East Peabody Drive
City: Champaign
State_or_Province: Illinois
Postal_Code: 61820
Country: USA
Contact_Voice_Telephone: 217-333-5102
Contact_Facsimile_Telephone: 217-333-2830
Contact_Electronic_Mail_Address: denhart@geoserv.isgs.uiuc.edu
Hours_of_Service: 8:00 a.m. - 5:00 p.m., Monday-Friday
Resource_Description:
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.)
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 1.589

Metadata_Reference_Information:
Metadata_Date: 20071018
Metadata_Review_Date: 19980331
Metadata_Future_Review_Date: 200003
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Curtis Abert
Contact_Organization: Illinois State Geological Survey
Contact_Organization_Primary:
Contact_Organization:
REQUIRED: The organization responsible for the metadata information.
Contact_Person: REQUIRED: The person responsible for the metadata information.
Contact_Address:
Address_Type: mailing address
Address: 615 East Peabody Drive
City: Champaign
State_or_Province: Illinois
Postal_Code: 61820
Country: USA
Contact_Voice_Telephone: 217-244-2188
Contact_Facsimile_Telephone: 217-333-2830
Contact_Electronic_Mail_Address: abert@flanders.isgs.uiuc.edu
Hours_of_Service: 8:00 a.m. - 5:00 p.m., Monday-Friday
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: none
Metadata_Use_Constraints: none
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.6 on Thu Oct 18 14:13:40 2007