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Bathymetry (5m): Offshore of Coal Oil Point, California, 2009

Identification Information

Citation
Title
Bathymetry (5m): Offshore of Coal Oil Point, California, 2009
Originator
Dartnell, Peter
Originator
Finlayson, David P.
Originator
Kvitek, Rikk G.
Originator
Conrad, Jamie E.
Originator
Phillips, Eleyne L.
Originator
Pacific Coastal and Marine Science Center
Originator
Golden, Nadine E.
Publisher
Geological Survey (U.S.)
Place of Publication
Santa Cruz , California , US
Publication Date
2014-01-01
Edition
1.0
Identifier
http://purl.stanford.edu/zk014ff3638
Geospatial Data Presentation Form
mapDigital
Collection Title
California State Waters Map Series (USGS Data Series 781)
Other Citation Details
These data were downloaded from http://pubs.usgs.gov/ds/781 on July 15, 2015
Series
Series Title
USGS Data Series
Issue
781
Abstract
This part of Scientific Investigations Map (SIM) 3302 presents data for the bathymetry and shaded-relief maps (see sheets 1, 2, SIM 3302) of the Offshore of Coal Oil Point map area, California. The bathymetry and shaded-relief maps of the Offshore of Coal Oil Point map area, California, were generated from bathymetry data collected by the U.S. Geological Survey (USGS), by California State University, Monterey Bay, Seafloor Mapping Lab (CSUMB), and by Fugro Pelagos. Most of the nearshore and shelf areas were mapped by the USGS in the summers of 2006, 2007, and 2008, using a combination of 117-kHz and 234.5-kHz SEA (AP) Ltd. SWATHplus-M phase-differencing sidescan sonars. A small area in the far-eastern nearshore and shelf was mapped by CSUMB in the summer of 2007, using a 244-kHz Reson 8101 multibeam echosounder. The outer shelf and slope were mapped by Fugro Pelagos in 2008, using a combination of 400-kHz Reson 7125, 240-kHz Reson 8101, and 100-kHz Reson 8111 multibeam echosounders. The nearshore bathymetry and coastal topography were also mapped by Fugro Pelagos in 2009 for the U.S. Army Corps of Engineers (USACE) Joint Lidar Bathymetry Technical Center of Expertise, using the SHOALS-1000T bathymetric-lidar and the Leica ALS60 topographic-lidar systems. All of these mapping missions combined to collect bathymetry from the 0-m isobath to beyond the 3-nautical-mile limit of California's State Waters. NOTE: the horizontal datum of the bathymtry data (NAD83) differs from the horizontal datum of other layers in this SIM (WGS84). Some bathymetry grids within this map were projected horizontally from WGS84 to NAD83 using ESRI tools to be more consistent with the vertical reference of the North American Vertical Datum of 1988 (NAVD88).
Purpose
In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP) to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats and geology within the 3-nautical-mile limit of California's State Waters. CSMP has divided coastal California into 110 map blocks, each to be published individually as United States Geological Survey Open-File Reports (OFRs) or Scientific Investigations Maps (SIMs) at a scale of 1:24,000. Maps display seafloor morphology and character, identify potential marine benthic habitats and illustrate both the seafloor geology and shallow (to about 100 m) subsurface geology. Data layers for bathymetry, bathymetric contours, acoustic backscatter, seafloor character, potential benthic habitat and offshore geology were created for each map block, as well as regional-scale data layers for sediment thickness, depth to transition, transgressive contours, isopachs, predicted distributions of benthic macro-invertebrates and visual observations of benthic habitat from video cruises over the entire state. These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes.The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.
Supplemental Information
Information for the related USGS Pacific Coastal and Marine Science Center data collection field activities is available online: Z-2-06-SC, at http://walrus.wr.usgs.gov/infobank/z/z206sc/html/z-2-06-sc.meta.html; Z-1-07-SC, at http://walrus.wr.usgs.gov/infobank/z/z107sc/html/z-1-07-sc.meta.html; and S-8-08-SC, at http://walrus.wr.usgs.gov/infobank/s/s808sc/html/s-8-08-sc.meta.html.
Temporal Extent
Currentness Reference
ground condition
Time Period
Begin
2006-01-01T00:00:00
End
2009-12-31T00:00:00
Bounding Box
West
-120
East
-119.81
North
34.51
South
34.35
Bounding Box
West
-120.000237
East
-119.817834
North
34.401935
South
34.346795
ISO Topic Category
imageryBaseMapsEarthCover
oceans
elevation
Place Keyword
California
Santa Barbara County (Calif.)
Pacific Ocean
Place Keyword Thesaurus
geonames
Temporal Keyword
2006-2009
Theme Keyword
Coasts
Digital elevation models
Remote sensing
Bathymetric maps
Geomorphology
Multibeam mapping
Submarine topography
Ocean bottom
Seismic reflection method
Theme Keyword Thesaurus
lcsh
Legal Constraints
Other Restrictions
This item is in the public domain. There are no restrictions on access or use.
Status
completed
Maintenance and Update Frequency
asNeeded
Collection
Collection Title
California State Waters Map Series (USGS Data Series 781)
URL
http://purl.stanford.edu/ng324gh5570
Publication Date
2013-01-01
Language
eng
Credit
U.S. Geological Survey. (2013). Bathymetry (5m): Offshore of Coal Oil Point, California, 2009. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/zk014ff3638.
Point of Contact
Contact
Dartnell, Peter
Position Name
Physical Scientist
Delivery Point
400 Natural Bridges Dr.
City
Santa Cruz
Administrative Area
CA
Postal Code
95060
Country
US
Email
PDartnell@usgs.gov
Phone
831-460-7415

Spatial Reference Information

Reference System Identifier
Code
32611
Code Space
EPSG
Version
8.2.6

Data Quality Information

Quantitative Attribute Accuracy Report
Absolute External Positional Accuracy
Absolute External Positional Accuracy
Lineage
Process Step
Description
During the CSUMB and Fugro Pelagos multibeam mapping missions, an Applanix POS MV (Position and Orientation System for Marine Vessels) was used to accurately position the vessels during data collection, and it also accounted for vessel motion such as heave, pitch, and roll (position accuracy, 2 m; pitch, roll, and heading accuracy, 0.02 degrees; heave accuracy, 5 percent, or 5 cm). To account for tidal-cycle fluctuations, CSUMB used NavCom 2050 GPS receiver (CNAV) data, and Fugro Pelagos used KGPS data (GPS data with real-time kinematic corrections). In addition, sound-velocity profiles were collected with an Applied Microsystems (AM) SVPlus sound velocimeter. Soundings were corrected for vessel motion using the Applanix POS MV data, for variations in water-column sound velocity using the AM SVPlus data, and for variations in water height (tides) using vertical-position data from the CNAV receiver and the KGPS data. Most soundings were converted to 2-m-resolution bathymetric-surface-model grids; however, soundings along the outer shelf and slope in water depths greater than 80 m were converted to a 5-m-resolution bathymetric-surface-model grid because of lower sounding density. Final 2007 XYZ soundings and bathymetric-surface models were referenced to the World Geodetic System of 1984 (WGS 1984) relative to the North American Vertical Datum of 1988 (NAVD 1988); the 2008 soundings were referenced to the North American Datum of 1983 (NAD 1983) relative to NAVD 1988. During the USGS mapping missions, differential GPS (DGPS) data (2006, 2007) and GPS data with real-time kinematic corrections (2008) were combined with measurements of vessel motion (heave, pitch, and roll) in a CodaOctopus F180 attitude-and-position system to produce a high-precision vessel-attitude packet. This packet was transmitted to the acquisition software in real time and combined with instantaneous sound-velocity measurements at the transducer head before each ping. The returned samples were projected to the seafloor using a ray-tracing algorithm that works with previously measured sound-velocity profiles. Statistical filters were applied to discriminate seafloor returns (soundings) from unintended targets in the water column. The original 2006 and 2007 soundings were referenced to the WGS 1984 relative to the MLLW (Mean Lower Low Water) tidal datum, but, through postprocessing using NOAA's VDatum tool, the soundings were transformed to NAVD 1988. The original 2008 soundings were referenced to the North American Datum of 1983 (NAD 1983), relative to NAVD 1988. Finally, the soundings were converted into 2-m-resolution bathymetric-surface-model grids. During the Fugro Pelagos coastal airborne-lidar mapping mission that was completed as part of the National Coastal Mapping Program of USACE, the Leica ALS60 topographic-lidar and the SHOALS-1000T bathymetric-lidar systems were mounted on an aircraft that flew survey lines at an altitude of 300 to 400 m (bathymetry) and 300 to 1,200 m (topography), at speeds of between 135 and 185 knots. The ALS60 system collected data at a maximum pulse rate of 200 kHz, and the SHOALS system collected data at 1 kHz. Information on aircraft position, velocity, and acceleration were collected using the Novatel and POS A/V 410 systems (SHOALS) and the onboard GPS/IMU system (ALS60). Aircraft-position data were processed using POSPac software, and the results were combined with the lidar data to produce 3-D positions for each lidar shot. Various commercial and proprietary software packages were used to clean the data, to convert all valid data from ellipsoid to orthometric heights, and to export the data as a series of topography and bathymetry ASCII files. Final grids were provided in geographic coordinates referenced to the NAVD 1988.
Process Date
2009-01-01T00:00:00
Process Step
Description
USGS 2-m-resolution bathymetry data from mapping cruises Z-2-06-SC, Z-1-07-SC, and S-0-08-SC were downloaded from USGS archives. Projected needed data horizontally from WGS 1984 relative to NAVD 1988 to the North American Datum of 1983 (NAD 1983) relative to NAVD 1988 using ESRI ArcGIS raster projection tool “WGS_84_(ITRF00)_To_NAD_1983”.
Process Date
2009-01-01T00:00:00
Process Step
Description
California State University, Monterey Bay, Seafloor Mapping Lab and Fugro Pelagos 2-m and 5-m-resolution bathymetry data within this map were downloaded from http://seafloor.csumb.edu/SFMLwebDATA.htm. Projected needed data horizontally from WGS 1984 relative to NAVD 1988 to the North American Datum of 1983 (NAD 1983) relative to NAVD 1988 using ESRI ArcGIS raster projection tool “WGS_84_(ITRF00)_To_NAD_1983”.
Process Date
2009-01-01T00:00:00
Process Step
Description
Transform all bathymetry data to common projection, datum, and UTM zone. Merge all 2-m bathymetry data into 2-m-resolution bathymetry grid and clip to the Offshore of Coal Oil Point, California, map boundary. 5-m resolution bathymetry grid was processed as separate grid. To create 2-m and 5-m resolution shaded-relief imagery, an illumination having an azimuth of 300 degrees and 45 degrees above the horizon was applied to the 2-m and 5-m bathymetry grids.
Process Date
2010-01-01T00:00:00
Process Step
Description
Topographic - Bathymetric lidar data were provided to the USGS, PCMSC by USACE.
Process Date
2010-01-01T00:00:00

Distribution Information

Distributor
Stanford Geospatial Center
Online Access
http://purl.stanford.edu/zk014ff3638
Protocol
http
Name
Bathymetry_5m_OffshoreCoalOilPoint.tif
Function
download

Content Information

Content Type
image

Spatial Representation Information

Raster
Number of Dimensions
2
Column Count
3326
Row Count
1129
Cell Geometry Type
area
Corner Points
Point
224186.370730 3804683.068775
Point
224186.370730 3810328.068775
Point
240816.370730 3810328.068775
Point
240816.370730 3804683.068775
Center Point
232501.370730 3807505.568775

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
edu.stanford.purl:zk014ff3638
Parent Identifier
http://purl.stanford.edu/ng324gh5570.mods
Dataset URI
http://purl.stanford.edu/zk014ff3638
Metadata Date Stamp
2015-07-23
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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