State of Illinois
92nd General Assembly
Legislation

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92_SB0824eng

 
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 1        AN ACT in relation to the Illinois Coordinate System.

 2        Be it  enacted  by  the  People  of  the  State  of  Illinois,
 3    represented in the General Assembly:

 4        Section 5.  The Illinois Coordinate System Act is amended
 5    by changing Sections 2, 5, and 7 as follows:

 6        (765 ILCS 225/2) (from Ch. 133, par. 102)
 7        Sec.  2.   The system of plane coordinates which has been
 8    established by the  United  States  Department  of  Commerce,
 9    National  Oceanic  and  Atmospheric  Administration, National
10    Ocean Service, National  Geodetic  Survey  for  defining  and
11    stating  the  positions or locations of points on the surface
12    of the earth within the State of Illinois is  hereinafter  to
13    be known and designated as the "Illinois Coordinate System".
14    (Source: P.A. 83-742.)

15        (765 ILCS 225/5) (from Ch. 133, par. 105)
16        Sec.  5.  The plane coordinates of a point on the earth's
17    surface, used in expressing the position or location of  that
18    point  in  the appropriate zone of this system, consists of 2
19    distances,  expressed  in  units  of  U.S.  survey  feet  and
20    decimals of a foot.  One of these  distances,  known  as  the
21    "x-coordinate",   gives  the  position  in  an  east-and-west
22    direction; the other, known as the "y-coordinate", gives  the
23    position  in  a north-and-south direction.  These coordinates
24    depend upon and conform to the coordinates, on  the  Illinois
25    Coordinate System, of the monumented survey triangulation and
26    traverse  stations  of  the  United  States National Geodetic
27    Ocean  Survey  within  the  State  of  Illinois,   as   those
28    coordinates have been determined by that survey.
29    (Source: P.A. 83-742.)
 
SB824 Engrossed             -2-                LRB9204858DHmb
 1        (765 ILCS 225/7) (from Ch. 133, par. 107)
 2        Sec.  7.   For  purposes  of  more precisely defining the
 3    Illinois  Coordinate   System   the   following   definitions
 4    definition  by  the  United  States  National  Geodetic Ocean
 5    Survey are is adopted:
 6        The Illinois Coordinate System, East Zone,  is  based  on
 7    the  transverse  Mercator  projection  of  the North American
 8    Datum of 1983 (NAD 83) or the Clarke spheroid of 1866  (North
 9    American  Datum  of 1927) (NAD 27), having a central meridian
10    of eighty-eight degrees and twenty minutes West (88°  =-20'W.)
11    of Greenwich on which meridian the scale is set at  one  part
12    in  40,000  too  small.   The origin of coordinates is at the
13    intersection of the meridian eighty-eight degrees and  twenty
14    minutes  West  (88°   =-20'W.)  of  Greenwich  and  thirty-six
15    degrees  and forty minutes North (36°  =-40'N.) latitude.  The
16    origin  is  given  the  coordinates  x   =   300,000   meters
17    (984,250.000  feet)  and  y  =  0  meters  for NAD 83 and x =
18    500,000 feet and y = 0 feet for the NAD 27.
19        The Illinois Coordinate System, West Zone,  is  based  on
20    the  transverse  Mercator  projection  of  the North American
21    Datum of 1983 (NAD 83) or the Clarke spheroid of  1866  North
22    American Datum of 1927 (NAD 27), having a central meridian of
23    ninety   degrees  and  ten  minutes  West  (90°   =-10'W.)  of
24    Greenwich, on which meridian the scale is set at one part  in
25    17,000  too  small.   The  origin  of  coordinates  is at the
26    intersection of the meridian ninety degrees and  ten  minutes
27    West  (90°   =-10'W.)  of Greenwich and thirty-six degrees and
28    forty minutes North (36°  =-40'N.) latitude.   The  origin  is
29    given the coordinates x = 700,000 meters (2,296,583.333 feet)
30    and  y  =  0 meters for NAD 83 and x = 500,000 feet and y = 0
31    feet for the NAD 27.
32        The position of the  Illinois  Coordinate  System  is  as
33    marked  on  the  ground by monumented survey triangulation or
34    traverse stations established in  conformity  with  standards
 
SB824 Engrossed             -3-                LRB9204858DHmb
 1    adopted  by  the United States National Geodetic Ocean Survey
 2    for second and  higher  order  first-order  and  second-order
 3    work,  whose geodetic positions have been rigidly adjusted on
 4    the North American Datum (NAD 1927 or NAD 1983, or both), and
 5    whose coordinates have been computed  on  the  system  herein
 6    defined.   Any  such  stations may be used for establishing a
 7    survey connection with the Illinois Coordinate System.
 8    (Source: P.A. 83-742.)

 9        Section 99.  Effective date.  This Act takes effect  upon
10    becoming law.

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