TZ4834 ***********************************************************************
TZ4834  DESIGNATION -  FORT
TZ4834  PID         -  TZ4834
TZ4834  STATE/COUNTY-  FL/MONROE
TZ4834  USGS QUAD   -  DRY TORTUGAS (1971)
TZ4834
TZ4834                         *CURRENT SURVEY CONTROL
TZ4834  ___________________________________________________________________
TZ4834* NAD 83(1990)-  24 37 46.70015(N)    082 52 22.29828(W)     ADJUSTED
TZ4834* NAVD 88     -        13.5    (meters)      44.     (feet)  VERTCON
TZ4834  ___________________________________________________________________
TZ4834  X           -     719,766.749 (meters)                     COMP
TZ4834  Y           -  -5,756,400.956 (meters)                     COMP
TZ4834  Z           -   2,641,834.561 (meters)                     COMP
TZ4834  LAPLACE CORR-          -1.20  (seconds)                    DEFLEC99
TZ4834  ELLIP HEIGHT-          -6.95  (meters)                     GPS OBS
TZ4834  GEOID HEIGHT-         -21.25  (meters)                     GEOID99
TZ4834
TZ4834  HORZ ORDER  -  THIRD
TZ4834  ELLP ORDER  -  FOURTH    CLASS II
TZ4834
TZ4834.The horizontal coordinates were established by GPS observations
TZ4834.and adjusted by the National Geodetic Survey in September 1992.
TZ4834
TZ4834.The NAVD 88 height was computed by applying the VERTCON shift value to
TZ4834.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
TZ4834
TZ4834.The X, Y, and Z were computed from the position and the ellipsoidal ht.
TZ4834
TZ4834.The Laplace correction was computed from DEFLEC99 derived deflections.
TZ4834
TZ4834.The ellipsoidal height was determined by GPS observations
TZ4834.and is referenced to NAD 83.
TZ4834
TZ4834.The geoid height was determined by GEOID99.
TZ4834
TZ4834;                    North         East     Units   Scale      Converg.
TZ4834;SPC FL E     -    34,110.424    10,360.708   MT  1.00038520 -0 46 50.7
TZ4834;UTM  17      - 2,725,230.767   310,425.412   MT  1.00004387 -0 46 50.7
TZ4834
TZ4834                          SUPERSEDED SURVEY CONTROL
TZ4834
TZ4834  NGVD 29     -        13.9    (m)           46.     (f) GPS OBS
TZ4834
TZ4834.Superseded values are not recommended for survey control.
TZ4834.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
TZ4834.See file dsdata.txt to determine how the superseded data were derived.
TZ4834
TZ4834_MARKER: DD = SURVEY DISK
TZ4834_SETTING: 34 = DRILL HOLE IN A RAMPART
TZ4834_STAMPING: FORT 1991
TZ4834_MAGNETIC: N = NO MAGNETIC MATERIAL
TZ4834_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL
TZ4834_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
TZ4834+SATELLITE: SATELLITE OBSERVATIONS - December 04, 1991
TZ4834
TZ4834  HISTORY     - Date     Condition        Recov. By
TZ4834  HISTORY     - 1992     MONUMENTED       NOS
TZ4834  HISTORY     - 19911204 GOOD
TZ4834
TZ4834                          STATION DESCRIPTION
TZ4834
TZ4834''DESCRIBED BY NATIONAL OCEAN SERVICE 1992
TZ4834''THE STATION IS LOCATED ON GARDEN KEY IN THE DRY TORTUGAS ON TOP OF
TZ4834''FORT JEFFERSON.
TZ4834''TO REACH THE STATION FROM KEY WEST, PROCEED WEST BY
TZ4834''BOAT FOR APPROXIMATELY 70 MILES TO GARDEN KEY AND FORT JEFFERSON
TZ4834''NATIONAL MONUMENT. PROCEED FROM THE DOCK ON FOOT THROUGH THE MAIN
TZ4834''ENTRANCE AND ACROSS THE PARADE GROUNDS TO THE NORTHERNMOST STAIRWAY
TZ4834''LEADING TO THE TOP OF THE FORT. CONTINUE UP THE STAIRWAY TO THE TOP OF
TZ4834''THE FORT AND PROCEED ESE ALONG THE WALL TO THE FIRST RAMPART AND TO
TZ4834''THE STATION ON TOP OF THE RAMPART.
TZ4834''THE STATION IS A STANDARD NOS
TZ4834''BRONZE DISK STAMPED FORT 1991 AND SET INTO A DRILL HOLE IN THE
TZ4834''CONCRETE ON THE TOP OF THE RAMPART. THE DISK IS SET IN THE CENTER OF
TZ4834''THE HIGHEST PART OF THE RAMPART.
TZ4834
TZ4834                          STATION RECOVERY (1991)
TZ4834
TZ4834''RECOVERED 1991
TZ4834''RECOVERED IN GOOD CONDITION.