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Overview
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Monterey Bay Beach Monitoring Project
Fort Ord Beach, / Monterey County, CA
10 September 1997, 13:39 - 14:06 PDT (local)
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Synopsis
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A beach and nearshore topographic survey consisting of one centerline profile and one shore-normal auxiliary
line was conducted at Fort Ord Beach (south of Stillwell Hall). The centerline profile was extended offshore
into the nearshore surf zone utilizing a swimming rodman. This survey is the latest in a series of
repetitive, profile surveys at this location, dating back to 1982.
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Total Station Location
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Geographic Coordinates: (WGS84 Ellipsoid, NAD83 datum, NAVD88 Elevation datum)
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Latitude: N ?d ?m ?s
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Longitude: W ?d ?m ?s
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Elevation: 10.445m
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UTM Coordinates: (Zone 10N, WGS84 Ellipsoid, NAD83 datum, NAVD88 Elevation datum)
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Northing: 4057704.468m
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Easting: 605162.300m
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Elevation: 10.445m
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Surveying Conditions
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Skies: ?
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Temperature: ? F
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Barometric Pressure: ? in HG
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Wind: ? kts out of the ?
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Precipitation: ?
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Sea State: 6 ft. breaking waves
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Optical Siting: ?
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Geodetics Equipment
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Geodimeter 640 Total Station
Autolock and Robotic capabilities
Internal memory only
Instrument Height meter
Wild tripod (wood)
12-volt gel cell battery
Stadia rods:
Mound City Round, expandable, fiberglass, stadia rods (REF0 and REF1):
w/single prism holder and sealed prism (combined heights: 1.705m, 3.099m, and 4.549m)
w/multiple prism holder and sealed prism, inverted configuration (combined heights: 1.769m, 3.164m, and 4.613m)
Nikonos Underwater 35mm Camera
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Field Procedure
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The total station was set up off the centerline. The HA reference was not set to 000d relative to any control point.
Program 10 (Location Information) was not performed on the total station.
Program 2 was used to collect control and topo points
Control Points: Three control points were surveyed (Standard mode)
The Profile was surveyed using the REF1 stadia rod (Tracking mode) and carried offshore into the surf zone.
The profile was terminated due to large waves.
Sand Sample: One sand sample was obtained (ID # 970910-4), on the beach foreshore
The Auxiliary line was surveyed using the REF1 stadia rod (Tracking mode) on a beach cusp horn (?) to the north of the centerline.
Jennifer Horsman sketched the beach and operated the total station.
John R. Dingler was the rodman for the topographic points.
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Field Observations
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This is an open-ocean type of beach with direct exposure to deep-water waves. Field notes suggest that three sets of
breaking waves were present indicating the presence of multiple (?) bars.
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Post-processing
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Survey data was downloaded from the Total Station memory , automatically creating a RAW file and an associated JOB file.
PFCODE.EXE was used on the JOB file to generate an ED file.
The ED file was edited to include necessary Program 10 information, Points block listing, and INFO codes.
Field procedures were checked and corrected as necessary.
PFGD.EXE was used on the ED file to generate a PF file (Cartesian-based, relative XYZ coordinates).
Extraneous lines were removed from the PF file to generate a DAT file (relative XYZ coordinates).
Data values from the DAT file were put into GRIDCON.XLS (??.XLS, sheet ??) to convert the relative XYZ data (Cartesian system) to UTM.
UTM data was plotted in plan and profile views using SigmaPlot (v. 5.0).
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Precision and Accuracy of Acquired Data
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Observed Precision of Control Points: (distance dependent, based on spread of values)
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Horizontal: < 0.05 m
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Vertical: < 0.005 m
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Observed Accuracy of Control Points: (field observations as compared to GPS derived positions)
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Horizontal: < 0.03 m
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Elevation: < 0.001 m
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Siting on topo points: (distance dependent, extension dependent, hand-held stadia)
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Horizontal: ~ 0.1 m
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Vertical: ~ 0.02 m
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Generated Files
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970910D.RAW: Original data file from the Geodimeter (linear format of polar coordinate data)
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970910D.JOB: Geotools generated observation file (similar in format to the RAW file)
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970910D.ED: PFCODE.EXE generated file (tabular format of polar coordinate data, from JOB file)
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970910D.PF: PFGD.EXE output file (from ED file)
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970910D.DAT: XYZ data, relative grid (Geodimeter as origin)
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970910D.UTM: Excel algorithm generated UTM coordinates
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970910D.JNB: SigmaPlot (v. 4.0) graphics file showing plan and profile views of UTM data
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970910D.DOC: This document file (MS WORD file)
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970910D.TXT: This document in ASCII format
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970910D.XLS: Excel sheet detailing survey operations
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