MY0561 ***********************************************************************
MY0561  DESIGNATION -  BASIC
MY0561  PID         -  MY0561
MY0561  STATE/COUNTY-  MA/SUFFOLK
MY0561  USGS QUAD   -
MY0561
MY0561                         *CURRENT SURVEY CONTROL
MY0561  ___________________________________________________________________
MY0561* NAD 83(1986)-  42 21 25.     (N)    071 03 12.     (W)     SCALED
MY0561* NAVD 88     -         6.583  (meters)      21.60   (feet)  ADJUSTED
MY0561  ___________________________________________________________________
MY0561  GEOID HEIGHT-         -27.71  (meters)                     GEOID99
MY0561  DYNAMIC HT  -           6.582 (meters)      21.59  (feet)  COMP
MY0561  MODELED GRAV-     980,381.7   (mgal)                       NAVD 88
MY0561
MY0561  VERT ORDER  -  SECOND    CLASS 0
MY0561
MY0561.The horizontal coordinates were scaled from a topographic map and have
MY0561.an estimated accuracy of +/- 6 seconds.
MY0561
MY0561.The orthometric height was determined by differential leveling
MY0561.and adjusted by the National Geodetic Survey in June 1991.
MY0561
MY0561.The geoid height was determined by GEOID99.
MY0561
MY0561.The dynamic height is computed by dividing the NAVD 88
MY0561.geopotential number by the normal gravity value computed on the
MY0561.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
MY0561.degrees latitude (g = 980.6199 gals.).
MY0561
MY0561.The modeled gravity was interpolated from observed gravity values.
MY0561
MY0561;                    North         East    Units  Estimated Accuracy
MY0561;SPC MA M     -   900,810.      236,800.      MT  (+/- 180 meters Scaled)
MY0561
MY0561                          SUPERSEDED SURVEY CONTROL
MY0561
MY0561  NGVD 29     -         6.832  (m)           22.41   (f) ADJ UNCH    2 0
MY0561
MY0561.Superseded values are not recommended for survey control.
MY0561.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
MY0561.See file dsdata.txt to determine how the superseded data were derived.
MY0561
MY0561_MARKER: DB = BENCH MARK DISK
MY0561_SETTING: 30 = MONUMENT
MY0561_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
MY0561
MY0561  HISTORY     - Date     Condition        Recov. By
MY0561  HISTORY     - UNK      MONUMENTED       CGS
MY0561  HISTORY     - 1947     GOOD             NGS
MY0561
MY0561                          STATION DESCRIPTION
MY0561
MY0561''DESCRIBED BY NATIONAL GEODETIC SURVEY 1947
MY0561''AT BOSTON.
MY0561''A STANDARD DISK SET IN THE TOP OF A CONCRETE MONUMENT PROJECTING
MY0561''ABOUT 2.0 FEET ABOVE THE GROUND, LOCATED IN THE NORTHEAST SECTION
MY0561''OF FORT HILL SQUARE PARK, WHICH IS ON HIGH STREET AT THE
MY0561''INTERSECTION OF BATTERY MARCH AND OLIVER STREET, THE MONUMENT
MY0561''IS 9.0 FEET SOUTHEAST OF THE EDGE OF THE WALK LEADING FROM THE
MY0561''CENTER OF THE PARK TOWARDS BELCHER LANE, AND THE WORDS UNITED
MY0561''STATES COAST AND GEODETIC SURVEY BASIC BENCH MARK ARE INSCRIBED ON
MY0561''THE NORTHWEST SIDE OF THE MONUMENT.