SECTIONS 8850-8861 - California Statutes

PUBLIC RESOURCES CODE

SECTION 8850-8861

8850. The official geodetic datums and spatial reference network
for use within the State of California shall be as defined by this
chapter.

8851. As used in this chapter:
(a) "NGS" means National Geodetic Survey or its successor.
(b) "CSRC" means California Spatial Reference Center or its
successor.
(c) "NAD83" means North American Datum of 1983.
(d) "NAVD88" means North American Vertical Datum of 1988.
(e) "ITRF" means International Terrestrial Reference Frame as
defined by the International Earth Rotation Service.
(f) "GPS" means Global Positioning System and includes other,
similar space-based systems.
(g) "FGDC" means Federal Geographic Data Committee or it
successor.
(h) "FGCS" means the Federal Geodetic Control Subcommittee or its
successor.
(i) "CSRN" means California Spatial Reference Network.

8852. The official geodetic datum to which horizontal positions and
ellipsoid heights are referenced within the State of California
shall be NAD83.

8853. The official geodetic datum to which orthometric heights are
referenced within the State of California shall be NAVD88.

8854. When horizontal positions, ellipsoid heights, or orthometric
heights are shown on a document, the document shall show the geodetic
datum to which the values are referenced, whether NAD83, NAVD88,
ITRF, or another datum.

8855. The official geodetic reference network for use within the
State of California shall be the CSRN as defined by this chapter.

8856. The geodetic control stations within the State of California
having horizontal positions conforming to all of the following
requirements shall be part of the CSRN. The horizontal positions
shall:
(a) Be referenced to NAD83.
(b) Have been determined by GPS survey methods.
(c) Be published by NGS or CSRC.
(d) Have a NGS or CSRC published network accuracy of two
centimeters or better as defined by FGDC or a NGS or CSRC published
accuracy of first order or better as defined by FGCS.
(e) Have a NGS or CSRC published horizontal velocity or a
horizontal velocity that can be determined using procedures and
values published by NGS or CSRC.

8857. The geodetic control stations within the State of California
having ellipsoid heights conforming to all of the following
requirements shall be part of the CSRN. The ellipsoid heights shall:
(a) Be referenced to NAD83.
(b) Have been determined by GPS survey methods.
(c) Be published by NGS or CSRC.
(d) Have a NGS or CSRC published network accuracy of five
centimeters or better as defined by FGDC or a NGS or CSRC published
accuracy of fourth order, class II, or better as defined by FGCS.

8858. The geodetic control stations within the State of California
having orthometric heights determined by GPS survey methods and
conforming to all of the following requirements shall be part of the
CSRN. The orthometric heights shall:
(a) Be based on NAD83 and referenced to NAVD88.
(b) Be published by NGS or CSRC.
(c) Have a NGS or CSRC published network accuracy of five
centimeters or better as defined by FGDC.

8859. The geodetic control stations within the State of California
having orthometric heights determined by differential leveling survey
methods and conforming to all of the following requirements shall be
part of the CSRN. The orthometric heights shall:
(a) Be referenced to NAVD88.
(b) Be published by NGS or CSRC.
(c) Have a NGS or CSRC published accuracy of third order, class II
or better as defined by FGCS.

8860. The use of the NAD83, NAVD88, and CSRN by any person, firm,
or governmental agency is optional.

8861. The provisions of this chapter shall not be construed to
prohibit the appropriate use of other datums, including ITRF, and
other geodetic reference networks.