Metadata: Identification_Information: Citation: Citation_Information: Originator: Bruce Jaffe Publication_Date: 2007 Title: 2005 single beam bathymetry data collected in South San Francisco Bay, California Geospatial_Data_Presentation_Form: tabular digital data Larger_Work_Citation: Citation_Information: Originator: Foxgrover, A., Jaffe, B., Hovis, G., Martin, C., Hubbard, J., Samant, M., and Sullivan, S. Publication_Date: 2007 Title: 2005 Hydrographic Survey of South San Francisco Bay, California Series_Information: Series_Name: Open-File Report Issue_Identification: 2007-1163 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.wr.usgs.gov/of/2007/1163 Description: Abstract: XYZ ASCII format data generated from the 2005 single beam acoustic bathymetric survey of South San Francisco Bay, CA. Z-values provided relative to the North American Vertical Datum of 1988 (NAVD88) and to Mean Lower Low Water (MLLW) of the 1983-2001 national tidal datum epoch where possible. Funding provided by the California Coastal Conservancy and survey collected by Sea Surveyor, Inc. of Benicia, CA. Purpose: These data are intended for science researchers, students, policy makers, and the general public. The data can be used with Geographic Information Systems (GIS) or other software to display bathymetry data of South San Francisco Bay, CA. Supplemental_Information: >Bounding ccordinates for ivdividual zones are as follows. > >Zone 31 West: -122.24, East: -122.18, North: 37.70, South: 37.67 >Zone 33 West: -122.31, East: -122.24, North: 37.67, South: 37.62 >Zone 34 West: -122.25, East: -122.17, North: 37.69, South: 37.64 >Zone 35 West: -122.28, East: -122.16, North: 37.67, South: 37.61 >Zone 36 West: -122.33, East: -122.25, North: 37.64, South: 37.59 >Zone 37 West: -122.31, East: -122.15, North: 37.66, South: 37.57 >Zone 38 West: -122.26, East: -122.15, North: 37.62, South: 37.55 >Zone 39 West: -122.23, East: -122.14, North: 37.60, South: 37.53 >Zone 40 West: -122.20, East: -122.12, North: 37.57, South: 37.51 >Zone 42 West: -122.17, East: -122.11, North: 37.55, South: 37.49 >Zone 43 West: -122.13, East: -122.09, North: 37.52, South: 37.47 >Zone 44 West: -122.12, East: -122.05, North: 37.50, South: 37.45 >Zone 46 West: -122.06, East: -122.03, North: 37.46, South: 37.45 >Zone 47 West: -122.34, East: -122.92, North: 37.47, South: 37.46 >Zone 48 West: -122.01, East: -121.98, North: 37.47, South: 37.46 >Zone 49 West: -121.98, East: -121.96, North: 37.47, South: 37.47 >Zone 50 West: -121.98, East: -121.97, North: 37.46, South: 37.46 >Zone 51 West: -121.96, East: -121.95, North: 37.48, South: 37.47 >Zone 52 West: -121.97, East: -121.95, North: 37.47, South: 37.46 >Zone 53 West: -121.97, East: -121.96, North: 37.46, South: 37.45 >Zone 54 West: -121.97, East: -122.00, North: 37.45, South: 37.44 >Zone 55 West: -122.02, East: -122.01, North: 37.46, South: 37.45 >Zone 56 West: -122.00, East: -121.99, North: 37.45, South: 37.43 >Zone 57 West: -121.99, East: -121.98, North: 37.43, South: 37.42 >Zone Upper Mud West: -121.95, East: -121.93, North: 37.47, South: 37.45 >Zone Upper Coyote West: -121.95, East: -121.95, North: 37.48, South: 37.48 >Zone Upper Artesian West: -121.96, East: -121.96, North: 37.44, South: 37.44 >Zone QC Lines West: -122.31, East: -122.12, North: 37.69, South: 37.51 Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20050110 Ending_Date: 20050405 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.34 East_Bounding_Coordinate: -121.92 North_Bounding_Coordinate: 37.70 South_Bounding_Coordinate: 37.42 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Marine Geology Theme_Keyword: Bathymetry Theme_Keyword: Hydrographic Survey Theme_Keyword: Water Depth Theme_Keyword: Bay Floor Topography Theme_Keyword: elevation Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Geology Program Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans and estuaries Theme_Keyword: geoscientificinformation Theme_Keyword: elevation Theme: Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD) Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY Theme_Keyword: EARTH SCIENCE > OCEANS > COASTAL PROCESSES Theme_Keyword: INSTRUMENTS > EARTH REMOTE SENSING > ACTIVE REMOTE SENSING > PROFILERS/SOUNDERS > ACCOUSTIC SOUNDERS Place: Place_Keyword_Thesaurus: None Place_Keyword: South San Francisco Bay Place_Keyword: CA Place_Keyword: Northern California Place_Keyword: USA Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: San Francisco Bay Place_Keyword: California Access_Constraints: None Use_Constraints: Please recognize the U.S. Geological Survey (USGS) and the California Coastal Conservancy as the source of this information. USGS-authored or produced data and information are in the public domain. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bruce Jaffe Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Contact_Position: Physical Oceanographer Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Dr City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 427-4742 Contact_Facsimile_Telephone: (831) 427-4748 Contact_Electronic_Mail_Address: bjaffe@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://walrus.wr.usgs.gov/infobank/b/b105sf/html/b-1-05-sf.nav.html Browse_Graphic_File_Description: Image showing location and extent of B-1-05-SF data. Browse_Graphic_File_Type: GIF Cross_Reference: Citation_Information: Originator: U.S. Geological Survey, Coastal and Marine Geology Program Publication_Date: 2007 Title: InfoBank Online_Linkage: http://walrus.wr.usgs.gov/infobank/b/b105sf/html/b-1-05-sf.meta.html Data_Quality_Information: Logical_Consistency_Report: To make the soundings comparable to historical data, water depths were measured and corrected for tide using the same methods as used during the more recent of the historical surveys of South San Francisco Bay. Soundings were collected using a single-beam, survey-grade depthfinder having the same frequency and beam-width as used during the more recent of the historical surveys. Soundings were corrected to the MLLW vertical datum using tide data measured at the same location and reduced by the same organization (NOAA) as historical surveys. Soundings from the hydrographic survey are in meters referenced to two separate vertical datum, including MLLW and NAVD-88. USGS will compare soundings referenced to MLLW to historical NOS surveys of South San Francisco Bay, and merge soundings referenced to NAVD-88 with the May 2004 LIDAR topographic data to create a terrain model of existing land surface elevation and bay bathymetry. Completeness_Report: Soundings were collected during periods of high tide in order to optimize Òbank-to-bankÓ coverage of South Bay tidal flats, and provide maximum overlap with the aerial topographic LIDAR data collected months earlier during periods of low tide. Soundings were collected across South San Francisco Bay along tracklines spaced at nominal 100m intervals and oriented in a southwest-northeast direction (perpendicular to the general bathymetric contour of the seafloor). Survey tracklines were divided into tide zones defined by NOAA (2006), with 100m overlap into adjacent zones. Dividing the tracklines into tide zone simplified processing the soundings and provided a QC check in the overlap area around tide zone boundaries. Unless obstructions were encountered, soundings near the shoreline extend to elevation +0.3m MLLW or higher. When practical, soundings were collected around obstructions to complete sounding lines. Overlap between survey areas and cross-lines (tielines) are provided for quality-control assessment of the soundings. Soundings were collected during all stages of the tide, provided that sufficient water depth was available for safe navigation. Areas shallower than Ð1m MLLW were surveyed during periods of extreme high tides when the water surface elevation is +1.75m MLLW or higher. Areas deeper than Ð3m MLLW were surveyed during all stages of the tide (high and low), but always during periods of ÒneapÓ tides when the water surface elevation changes less than 1.25m between high and low tides. Survey lines terminated early because of shallow water during low or moderate tides were re-surveyed during extreme high tides in order to collect soundings as far upland as possible. For QC purposes, survey lines terminated early at low tide are re-surveyed at high tide with a minimum 100m overlap. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: +/- 3 meters Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: in the bay, +/- 6 cm; in the sloughs and creeks, +/- 15 cm. Depths reduced to NAVD88 vertical datum. Lineage: Process_Step: Process_Description: The single beam bathymetric data was collected using an INNERSPACE Model 455 survey-grade depthfinder with 3-degree, 200kHz transducer. The depthfinder collects 20 soundings/second typically resulting in a nominal spacing of 0.15m along trackline. Tracklines are oriented perpendicularly to the slope of the bay floor and spaced 100 m apart. The data were reduced to the Mean Lower Low Water (MLLW) datum of the 1983 to 2001 epoch using a tidal reduction scheme created by NOAA consisting of specific time and range corrections for discrete zones within South SF Bay. After reducing the soundings to a common vertical datum, they were thinned to 1 m spacing along tracklines. (Reduction methodologies for soundings collected in Coyote Creek and the adjacent sloughs varied, please see details contained in the body of OF-1163). NOAA also calculated offset values for the difference between the tidal datum of MLLW and the geodetic datum of NAVD88. This offset was calculated for all zones except 51-54. All soundings except those in zones 51-54 are available relative to MLLW and soundings for the entire survey are available relative to NAVD88. Seperate X,Y,Z ASCII files for each vertical datum are provided. Process_Date: 20070504 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bruce Jaffe Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Contact_Position: Physical Oceanographer Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Dr City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 427-4742 Contact_Facsimile_Telephone: (831) 427-4748 Contact_Electronic_Mail_Address: bjaffe@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 10 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000064 Ordinate_Resolution: 0.000064 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: NAD83 Ellipsoid_Name: GRS80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: >Sample of Bathymetry XYZ ASCII file >X(UTM, m), Y(UTM, m), Depth(m, NAVD88) > >571247.445, 4172178.538, -0.213 >571246.972, 4172179.416, -0.213 >571246.452, 4172180.270, -0.274 >571245.662, 4172180.879, -0.305 >571244.849, 4172181.458, -0.335 >571243.978, 4172181.944, -0.335 >571243.130, 4172182.460, -0.396 >571242.222, 4172182.875, -0.427 >571241.337, 4172183.342, -0.457 >571240.447, 4172183.797, -0.518 Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Contact_Person: Bruce Jaffe Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Dr City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 427-4742 Distribution_Liability: These data not intended for navigational purposes. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user. Neither the U.S. Government nor any agency thereof, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, US DOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy. Metadata_Reference_Information: Metadata_Date: 20070504 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Amy Foxgrover Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Dr City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 427-4743 Contact_Facsimile_Telephone: (831) 427-4748 Contact_Electronic_Mail_Address: afoxgrover@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998