Idaho Statutes

TITLE 55

PROPERTY IN GENERAL

CHAPTER 17

                            TITLE  55
                                                      PROPERTY IN GENERAL
                                                                CHAPTER 17
                   COORDINATE SYSTEM OF LAND DESCRIPTION

 55-1701.  ESTABLISHING COORDINATE SYSTEM -- DESIGNATING ZONES. The system
of plane coordinates which has been established by the national ocean
service/national geodetic survey, formerly the United States coast and
geodetic survey, or its successors, for defining and stating the positions
or locations of points on the surface of the earth within the state of
Idaho is to be known and designated as the "Idaho coordinate system of
1983" and the "Idaho coordinate system of 1927." "The Idaho coordinate
system of 1927" may be used through December 31, 1995. On and after January
1, 1996, only the "Idaho coordinate system of 1983" shall be used.
 For the purpose of the use of this system the state is divided into an
"east zone," a "central zone," and a "west zone."
 The area now included in the following counties shall constitute the East
Zone: Bannock, Bear Lake, Bingham, Bonneville, Caribou, Clark, Franklin,
Fremont, Jefferson, Madison, Oneida, Power and Teton.
 The area now included in the following counties shall constitute the
Central Zone: Blaine, Butte, Camas, Cassia, Custer, Gooding, Jerome, Lemhi,
Lincoln, Minidoka and Twin Falls.
 The area now included in the following counties shall constitute the West
Zone: Ada, Adams, Benewah, Boise, Bonner, Boundary, Canyon, Clearwater,
Elmore, Gem, Idaho, Kootenai, Latah, Lewis, Nez Perce, Owyhee, Payette,
Shoshone, Valley and Washington.

55-1702.  ZONE REFERENCES. As established for use in the east zone, the
Idaho coordinate system of 1927 or the Idaho coordinate system of 1983
shall be named, and in any land description in which it is used it shall be
designated the "Idaho coordinate system of 1927, east zone" or "Idaho
coordinate system of 1983, east zone."
 As established for use in the central zone, the Idaho coordinate system of
1927 or the Idaho coordinate system of 1983 shall be named, and in any land
description in which it is used it shall be designated the "Idaho
coordinate system of 1927, central zone" or "Idaho coordinate system of
1983, central zone."
 As established for use in the west zone, the Idaho coordinate system of
1927 or the Idaho coordinate system of 1983 shall be named, and in any land
description in which it is used it shall be designated the "Idaho
coordinate system of 1927, west zone" or "Idaho coordinate system of 1983,
west zone." For limitations on the use of the coordinate systems of 1927
and 1983, see section 55-1710 [55-1701], Idaho Code.

55-1703.  PLANE COORDINATES. The plane coordinates of a point on the
earth's surface, to be used in expressing the position or location of such
point in the appropriate zone of this system, shall consist of two (2)
distances, expressed in United States survey feet and decimals of a foot
when using the Idaho coordinate system of 1927 and expressed in meters and
decimals of a meter when using the Idaho coordinate system of 1983. For
state plane coordinate system 27 (SPCS 27), one (1) of these distances, to
be known as the "x-coordinate," shall give the position in an east-and-west
direction; the other, to be known as the "y-coordinate," shall give the
position in a north-and-south direction. For state plane coordinate system
83 (SPCS 83), one (1) of these distances, to be known as "northing" or "N"
shall give the position in a north-and-south direction; the other, to be
known as the "easting" or "E" shall give the position in an east-and-west
direction. These coordinates shall be made to depend upon and conform to
the plane rectangular coordinate values for the monumented points of the
North American national geodetic horizontal network as published by the
national ocean service/national geodetic survey or its successors, and such
plane coordinates shall have been computed on the systems defined in this
chapter. Any such station may be used for establishing a survey connection
to either the Idaho coordinate system of 1927 or the Idaho coordinate
system of 1983, and after December 31, 1995, only to the Idaho coordinate
system of 1983.

55-1704.  TRACTS EXTENDING INTO TWO ZONES. When any tract of land to be
defined by a single description extends from one into another of the above
coordinate zones, the position of all points on its boundaries may be
referred to either of such zones, the zone which is used being specifically
named in the description.

55-1705.  ADOPTION OF NATIONAL OCEAN SERVICE/NATIONAL GEODETIC SURVEY
DEFINITION. (1) For the purpose of more precisely defining the Idaho
coordinate system of 1927, the following definition by the national ocean
service/national geodetic survey is adopted:
 The Idaho coordinate system of 1927, east zone, is a transverse mercator
projection of the Clarke spheroid of 1866 having a central meridian 112§10'
west of Greenwich, which meridian has a reduced scale of one part in
19,000. The origin of coordinates is at the intersection of the meridian
112§10' west of Greenwich and the parallel 41§40' north latitude. This
origin is given the coordinates: x=500,000 feet and y=0 feet.
 The Idaho coordinate system of 1927, central zone, is a transverse
mercator projection of the Clarke spheroid of 1866, having a central
meridian 114§00' west of Greenwich which meridian has a reduced scale of
one part in 19,000. The origin of coordinates is at the intersection of the
meridian 114§00' west of Greenwich and the parallel 41§40' north latitude.
This origin is given the coordinates: x=500,000 feet and y=0 feet.
 The position of the Idaho coordinate system of 1927, west zone, is a
transverse mercator projection of the Clarke spheroid of 1866, having a
central meridian 115§45' west of Greenwich, which meridian has a reduced
scale of one part in 15,000. The origin of coordinates is at the
intersection of the meridian 115§45' west of Greenwich and the parallel
41§40' north latitude. This origin is given the coordinates: x=500,000 feet
and y=0 feet.
 (2)  For the purpose of more precisely defining the Idaho coordinate
system of 1983, the following definition by the national ocean
service/national geodetic survey is adopted:
 The Idaho coordinate system of 1983, east zone, is a transverse mercator
projection of the North American datum of 1983 based on the geodetic
reference system of 1980 (GRS 80), having a central meridian 112§10' west
of Greenwich, which meridian has a reduced scale of one part in 19,000. The
origin of coordinates is at the intersection of the meridian 112§10' west
of Greenwich and the parallel 41§40' north latitude. This origin is given
the coordinates: N=0 meters and E=200,000 meters.
 The Idaho coordinate system of 1983, central zone, is a transverse
mercator projection of the North American datum of 1983 based on the
geodetic reference system of 1980 (GRS 80), having a central meridian
114§00' west of Greenwich, which meridian has a reduced scale of one part
in 19,000. The origin of coordinates is at the intersection of the meridian
114§00' west of Greenwich and the parallel 41§40' north latitude. This
origin is given the coordinates: N=0 meters and E=500,000 meters.
 The Idaho coordinate system of 1983, west zone, is a transverse mercator
projection of the North American datum of 1983 based on the geodetic
reference system of 1980 (GRS 80), having a central meridian 115§45' west
of Greenwich, which meridian has a reduced scale of one part in 15,000. The
origin of coordinates is at the intersection of the meridian 115§45' west
of Greenwich and the parallel 41§40' north latitude. This origin is given
the coordinates: N=0 meters and E=800,000 meters.
 (3)  The position of the Idaho coordinate system shall be as marked on the
ground by triangulation, traverse and global positioning satellite system
stations established in conformity with the standards adopted by the
national ocean service/national geodetic survey for A-order, B-order,
first-order and second-order work, whose geodetic positions have been
rigidly adjusted on the North American datum of 1927 and further refined on
the North American datum of 1983, and whose coordinates have been computed
on the system herein defined. Any such station may be used for establishing
a survey connection with either the Idaho coordinate system of 1927 or the
Idaho coordinate system of 1983, and after December 31, 1995, only to the
Idaho coordinate system of 1983.

55-1706.  FIVE KILOMETER TRIANGULATION LIMITATION. No coordinates based on
the Idaho coordinate system, purporting to define the position of a point
on a land boundary, shall be presented to be recorded in any public land
records or deed records unless such coordinates have been established in
conformity with the nationally prescribed standards for third-order, class
II horizontal control surveys, and provided that these surveys have been
tied to or originated off monumented A-order, B-order, first-order or
second-order horizontal control stations which are adjusted to and
published in the national network of geodetic control and are within five
(5) kilometers of the said boundary points or land corners. The prescribed
standards of accuracy for A-order, B-order, first-order or second-order
geodetic surveying are prepared and published by the federal geodetic
control committee (FGCC) of the United States department of commerce.
Standards and specifications of the FGCC or its successor in force on date
of said survey shall apply. Publishing existing control stations, or the
acceptance with intent to publish the newly established stations, by the
national ocean service/national geodetic survey shall constitute evidence
of adherence to the FGCC specifications. Limitations specified in this
section may be modified by a duly authorized state agency to meet local
conditions.

55-1707.  USE OF TERM. The use of the term "Idaho coordinate system of
1927, east, central, west zone" or "Idaho coordinate system of 1983 east,
central, west zone" on any map, report or survey, or other document, shall
be limited to coordinates based on the Idaho coordinate system as defined
in this chapter.

55-1708.  COORDINATE DESCRIPTIONS SUPPLEMENTAL. Whenever coordinates based
on the Idaho coordinate system are used to describe any tract of land which
in the same document is also described by reference to any subdivision,
line or corner of the United States public land surveys, the description by
coordinates shall be construed as supplemental to the basic description of
such subdivision, line or corner contained in the official plats and field
notes filed of record, and in the event of any conflict the description by
reference to the subdivision, line or corner of the United States public
land surveys shall prevail over the description by coordinates unless said
coordinates are upheld by adjudication, at which time the coordinate
description shall prevail. Every recorded map, survey or conveyance or
other instrument affecting title to real property which delineates,
describes or refers to such property or any part thereof by reference to
coordinates based upon the designated Idaho coordinate system shall also
describe the property by reference and tie to either section corner or
quarter corner monuments of the United States public land surveys.

55-1709.  DESCRIPTION BY COORDINATE NOT MANDATORY. Nothing contained in
this chapter shall require any purchaser or mortgagee of real property to
rely wholly on a land description, any part of which depends exclusively
upon the designated Idaho coordinate system