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Public Act 92-0311
SB824 Enrolled LRB9204858DHmb
AN ACT in relation to the Illinois Coordinate System.
Be it enacted by the People of the State of Illinois,
represented in the General Assembly:
Section 5. The Illinois Coordinate System Act is amended
by changing Sections 2, 5, and 7 as follows:
(765 ILCS 225/2) (from Ch. 133, par. 102)
Sec. 2. The system of plane coordinates which has been
established by the United States Department of Commerce,
National Oceanic and Atmospheric Administration, National
Ocean Service, National Geodetic Survey for defining and
stating the positions or locations of points on the surface
of the earth within the State of Illinois is hereinafter to
be known and designated as the "Illinois Coordinate System".
(Source: P.A. 83-742.)
(765 ILCS 225/5) (from Ch. 133, par. 105)
Sec. 5. The plane coordinates of a point on the earth's
surface, used in expressing the position or location of that
point in the appropriate zone of this system, consists of 2
distances, expressed in units of U.S. survey feet and
decimals of a foot. One of these distances, known as the
"x-coordinate", gives the position in an east-and-west
direction; the other, known as the "y-coordinate", gives the
position in a north-and-south direction. These coordinates
depend upon and conform to the coordinates, on the Illinois
Coordinate System, of the monumented survey triangulation and
traverse stations of the United States National Geodetic
Ocean Survey within the State of Illinois, as those
coordinates have been determined by that survey.
(Source: P.A. 83-742.)
(765 ILCS 225/7) (from Ch. 133, par. 107)
Sec. 7. For purposes of more precisely defining the
Illinois Coordinate System the following definitions
definition by the United States National Geodetic Ocean
Survey are is adopted:
The Illinois Coordinate System, East Zone, is based on
the transverse Mercator projection of the North American
Datum of 1983 (NAD 83) or the Clarke spheroid of 1866 (North
American Datum of 1927) (NAD 27), having a central meridian
of eighty-eight degrees and twenty minutes West (88° =-20'W.)
of Greenwich on which meridian the scale is set at one part
in 40,000 too small. The origin of coordinates is at the
intersection of the meridian eighty-eight degrees and twenty
minutes West (88° =-20'W.) of Greenwich and thirty-six
degrees and forty minutes North (36° =-40'N.) latitude. The
origin is given the coordinates x = 300,000 meters
(984,250.000 feet) and y = 0 meters for NAD 83 and x =
500,000 feet and y = 0 feet for the NAD 27.
The Illinois Coordinate System, West Zone, is based on
the transverse Mercator projection of the North American
Datum of 1983 (NAD 83) or the Clarke spheroid of 1866 North
American Datum of 1927 (NAD 27), having a central meridian of
ninety degrees and ten minutes West (90° =-10'W.) of
Greenwich, on which meridian the scale is set at one part in
17,000 too small. The origin of coordinates is at the
intersection of the meridian ninety degrees and ten minutes
West (90° =-10'W.) of Greenwich and thirty-six degrees and
forty minutes North (36° =-40'N.) latitude. The origin is
given the coordinates x = 700,000 meters (2,296,583.333 feet)
and y = 0 meters for NAD 83 and x = 500,000 feet and y = 0
feet for the NAD 27.
The position of the Illinois Coordinate System is as
marked on the ground by monumented survey triangulation or
traverse stations established in conformity with standards
adopted by the United States National Geodetic Ocean Survey
for second and higher order first-order and second-order
work, whose geodetic positions have been rigidly adjusted on
the North American Datum (NAD 1927 or NAD 1983, or both), and
whose coordinates have been computed on the system herein
defined. Any such stations may be used for establishing a
survey connection with the Illinois Coordinate System.
(Source: P.A. 83-742.)
Section 99. Effective date. This Act takes effect upon
becoming law.
Passed in the General Assembly May 16, 2001.
Approved August 09, 2001.
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