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Service Description: The data were digitized in the late 1960s, early 1970s, and in 1984-85 from 7.5- and 15-minute USGS topographic quadrangles. Errors in the location of a given feature are dependent on the accuracy of the original maps and on the accuracy of digitizing. Estimates are that features have an average locational error of approximately plus/minus 100 feet. Some areas of the state have a locational error of approximately 600 feet.
In areas of French colonization land grants, where PLSS sections were not actually surveyed, sections and section lines have been added (estimated).
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MaxRecordCount: 2000
Supported Query Formats: JSON
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Description: The data were digitized in the late 1960s, early 1970s, and in 1984-85 from 7.5- and 15-minute USGS topographic quadrangles. Errors in the location of a given feature are dependent on the accuracy of the original maps and on the accuracy of digitizing. Estimates are that features have an average locational error of approximately plus/minus 100 feet. Some areas of the state have a locational error of approximately 600 feet.In areas of French colonization land grants, where PLSS sections were not actually surveyed, sections and section lines have been added (estimated).
Copyright Text: Illinois State Geologic Survey, 2003
Spatial Reference:
102100
(3857)
Initial Extent:
XMin: -1.0677685989079878E7
YMin: 4394274.371564336
XMax: -9249476.277320124
YMax: 5278084.1461356655
Spatial Reference: 102100
(3857)
Full Extent:
XMin: -1.01872390035E7
YMin: 4434923.0427
XMax: -9739923.2629
YMax: 5237435.4750000015
Spatial Reference: 102100
(3857)
Units: esriMeters
Document Info:
Title: Map
Author:
Comments: The data were digitized in the late 1960s, early 1970s, and in 1984-85 from 7.5- and 15-minute USGS topographic quadrangles. Errors in the location of a given feature are dependent on the accuracy of the original maps and on the accuracy of digitizing. Estimates are that features have an average locational error of approximately plus/minus 100 feet. Some areas of the state have a locational error of approximately 600 feet.In areas of French colonization land grants, where PLSS sections were not actually surveyed, sections and section lines have been added (estimated).
Subject: Illinois Public Land Survey System (PLSS) boundaries and designations in line and polygon feature classes. The polygon attribute data include meridian, township, range, section and county number (FIPS) designations. The line attributes indicate line type, including the state line, county lines, township and range lines, section lines, Indian treaty boundaries, base lines, principal meridians, and boundaries between areas mapped from different principal meridians. (ISGS, 2003). THESE DATA HAVE POSITIONAL INACCURACY OF UP TO 600 FEET IN SOME AREAS OF THE STATE. THEY ARE NOT TO BE USED AT SCALES GREATER THAN 1:62,500. THE DATA ARE NOT APPROPRIATE AS A GEODETIC, LEGAL OR ENGINEERING BASE.
Category:
Keywords: PLSS,Public Land Survey System,Illinois,Township,Range,Section,ISGS
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Enable Z Defaults: false
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Supports ApplyEdits With Global Ids: true
Support True Curves : true
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Supports Dynamic Layers: false
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