AE7506 ***********************************************************************
AE7506  DESIGNATION -  B 218 RESET 1987
AE7506  PID         -  AE7506
AE7506  STATE/COUNTY-  NC/WAKE
AE7506  USGS QUAD   -  RALEIGH WEST (1988)
AE7506
AE7506                         *CURRENT SURVEY CONTROL
AE7506  ___________________________________________________________________
AE7506* NAD 83(1986)-  35 48 16.17234(N)    078 37 30.00226(W)     ADJUSTED
AE7506* NAVD 88     -        73.85   (+/-2cm)     242.3    (feet)  VERTCON
AE7506  ___________________________________________________________________
AE7506  LAPLACE CORR-          -7.61  (seconds)                    DEFLEC99
AE7506  GEOID HEIGHT-         -32.92  (meters)                     GEOID99
AE7506
AE7506  HORZ ORDER  -  SECOND
AE7506  VERT ORDER  -  THIRD ? (See Below)
AE7506
AE7506.The North Carolina/South Carolina HARNS have been completed but,
AE7506.due to contractual restrictions, coordinates for these stations
AE7506.will NOT be published in the near future. In the interim, the
AE7506.published coordinates in North and South Carolina will not be
AE7506.consistent with the Continuously Operating Reference Stations
AE7506.(CORS). The HARN coordinates for these stations are available
AE7506.upon request. Contact Gary Thompson(919-733-3836), or Lewis
AE7506.Lapine(803-896-7700).
AE7506.
AE7506.In addition, the published North and South Carolina positions
AE7506.(NAD 83 (1986)) are NOT consistent with those determined in
AE7506.adjacent state readjustments. The discontinuity between stations
AE7506.located in North or South Carolina and those in adjacent states
AE7506.which have been adjusted to the HARN may be as much as 5
AE7506.decimeters. This will result in a significant loss of accuracy
AE7506.over lines crossing such state borders.
AE7506
AE7506
AE7506.The horizontal coordinates were established by classical geodetic methods
AE7506.and adjusted by the National Geodetic Survey in February 1998.
AE7506
AE7506.The NAVD 88 height was computed by applying the VERTCON shift value to
AE7506.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
AE7506.The vertical order pertains to the superseded datum.
AE7506
AE7506.The Laplace correction was computed from DEFLEC99 derived deflections.
AE7506
AE7506.The geoid height was determined by GEOID99.
AE7506
AE7506;                    North         East     Units   Scale      Converg.
AE7506;SPC NC       -   227,973.102   643,492.979   MT  0.99991902 +0 12 59.2
AE7506;UTM  17      - 3,964,867.044   714,599.692   MT  1.00016752 +1 23 23.8
AE7506
AE7506                          SUPERSEDED SURVEY CONTROL
AE7506
AE7506  NGVD 29     -        74.13   (m)          243.2    (f) LEVELING    3
AE7506
AE7506.Superseded values are not recommended for survey control.
AE7506.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
AE7506.See file dsdata.txt to determine how the superseded data were derived.
AE7506
AE7506_MARKER: DB = BENCH MARK DISK
AE7506_SETTING: 35 = BRIDGE FLOOR
AE7506_STAMPING: B 218 RESET 1980-1987
AE7506_MAGNETIC: O = OTHER; SEE DESCRIPTION
AE7506_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
AE7506+STABILITY: SURFACE MOTION
AE7506
AE7506  HISTORY     - Date     Condition        Recov. By
AE7506  HISTORY     - 1987     MONUMENTED       NCGS
AE7506  HISTORY     - 19960325 GOOD             NCGS
AE7506
AE7506                          STATION DESCRIPTION
AE7506
AE7506''DESCRIBED BY NORTH CAROLINA GEODETIC SURVEY 1996 (JGG)
AE7506''RECOVERED AS DESCRIBED. STATION IS IN NORTHEAST RALEIGH. ALONG WAKE
AE7506''FOREST ROAD FOR 0.25 MI (0.40 KM) SOUTHWEST FROM WHITAKER MILL ROAD,
AE7506''AT THE RAILROAD BRIDGE, AT THE SOUTHEAST CORNER. MARK IS LOCATED 4.6
AE7506''FT (1.4 M) SOUTH-SOUTHWEST OF THE SOUTH RAIL OF THE TRACK, 9.1 FT (2.8
AE7506''M) WEST-NORTHWEST OF THE SOUTHEAST END OF THE CONCRETE BRIDGE RAIL,
AE7506''41.0 FT (12.5 M) WEST-NORTHWEST OF A SIGNAL LIGHT POLE, AND 2.5 FT
AE7506''(0.8 M) NORTH OF THE BRIDGE RAIL.