NOS Survey H09793 - HYD93 Format Header

  Surv Id Format Ngdc Id   Params Create Date Source Institution Seq
4 H09793 HYD93 03101048   SF 19870619 National Ocean Survey, N.O.A.A. 01
Country Platform Name Plat Type Chief Hydrographer(s) Seq
U.S.A. Rainier 1SHIP J.P. RANDALL 02
Project Type of Survey Strt Yr End Yr Scale of Survey Seq
OPR-L123 Basic Hydrographic survey 1978 1978 10000 03
Area (General) of Survey Area (Specific) of Survey Seq
SAN FRANCISCO BAY GOLDEN GATE TO TIBURON PENINSULA 04
Quality of Survey Description Processing Status Description Seq
    05
Position Determination Seq
Elec. range-range; Range-azi., elec. range+theod. cut; Visual sextant; Dig pos 06
Code Horizontal Datum of Records Code Original Horizontal Datum Seq
NOS31 North American Datum 1983 NOS06 North American Datum 1927 07
code Vertical Datum tide Original Sounding Units Seq
04 Mean Lower Low Water 5.0 feet 08
Sounding Method Seq
Digital Echo Sounder w/ Graphical Record assumed 09
c Sound Velocity Correction Seq
1 Corrected for actual sound velocity 10
Data Processing Methodology Seq
Digital data processed at NOS Marine Center: HARRIS 11
Format of Data Records Top Lat Bottom Lat Left Lon Right Lon Seq
SURV,LAT,LON,VAL,TYP,CCODE(A8,F9.6,F10.6,F6.1,I1,I3) +37.90 +37.80 -122.53 -122.43 12
Additional Documentation
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Note: You can find the comnplete HYD93 Format Specification, including all code descriptions, at www.ngdc.noaa.gov/mgg/dat/geodas/docs/hyd93.htm