Bryan E. Dieter
H. Gary Greene
Charles A. Endris
2014
Habitat--Offshore of Bodega Head, California
vector digital data
Data Series
DS 781
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/ds781
https://pubs.usgs.gov/ds/781/OffshoreBodegaHead/data_catalog_OffshoreBodegaHead.html
Nadine E. Golden
2013
California State Waters Map Series Data Catalog
database
Data Series
DS 781
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/ds781
This part of DS 781 presents data for the habitat map of the seafloor of the Offshore of Bodega Head map area, California. The vector data file is included in "Habitat_OffshoreBodegaHead.zip," which is accessible from https://pubs.usgs.gov/ds/781/OffshoreBodegaHead/data_catalog_OffshoreBodegaHead.html. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Golden, N.E., Hartwell, S.R., Erdey, M.D., Greene, H.G., Cochrane, G.R., Kvitek, R.G., Manson, M.W., Endris, C.A., Dieter, B.E., Watt, J.T., Krigsman, L.M., Sliter, R.W., Lowe, E.N., and Chin, J.L. (S.Y. Johnson and S.A. Cochran, eds.), 2015, California State Waters Map Series—Offshore of Bodega Head, California: U.S. Geological Survey Open-File Report 2015–1140, pamphlet 39 p., 10 sheets, scale 1:24,000, https://doi.org/10.3133/ofr20151140.
Potential marine benthic habitat maps were constructed using multibeam echosounder (MBES) bathymetry and backscatter data. The habitats were based on substrate types and documented or "ground truthed" using underwater video images and seafloor samples obtained by the USGS. These maps display various habitat types that range from flat, soft, unconsolidated sediment-covered seafloor to hard, deformed (folded), or highly rugose and differentially eroded bedrock exposures.
To expand geologic mapping to the seafloor within the California's State Waters, to update coastal geologic mapping, and to contribute to a uniform regional geologic database, which can be used geographic information systems. Additionally, to provide a geologic map for the public and geoscience community to aid in assessments and mitigation of geologic hazards in the Drakes Bay coastal region and to provide sufficient geologic information for land-use and land-management decisions both onshore and offshore. This information is not intended for navigational purposes.
References Cited:
Greene, H.G., Bizzarro, J.J., O'Connell, V.M., and Brylinsky, C.K., 2007, Construction of digital potential marine benthic habitat maps using a coded classification scheme and its application, in Todd, B.J., and Greene, H.G., eds., Mapping the seafloor for habitat characterization: Geological Association of Canada Special Paper 47, p. 141-155.
Greene, H.G., Yoklavich, M.M., Starr, R.M., O'Connell, V.M., Wakefield, W.W., Sullivan, D.E., McRea, J.E., Jr., and Cailliet, G.M., 1999, A classification scheme for deep seafloor habitats: Oceanologica Acta, v. 22, no. 6, p. 663-678.
Additional information about the field activity from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=l908NC
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.
2014
Publication Date
none planned
-123.17
-122.97
38.41
38.25
USGS Metadata Identifier
USGS:d23628e9-ddd5-4ab3-8ff5-beeb7f5d2a80
ISO 19115 Topic Category
geoscientificInformation
environment
oceans
imageryBaseMapsEarthCover
None
Fisheries
Ecosystem
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources
CMHRP
Pacific Coastal and Marine Science Center
PCMSC
Data Categories for Marine Planning
distributions
physical habitats and geomorphology
habitat
Marine Realms Information Bank (MRIB) keywords
seabed
habitats
benthos
USGS Thesaurus
sea-floor characteristics
habitats
benthos
ecosystems
Coastal and Marine Ecological Classification Standard (CMECS)
Marine Nearshore Subtidal
Marine Offshore Subtidal
Transform Continental Margin
Continental/Island Shelf
Rock Substrate
Unconsolidated Mineral Substrate
Geographic Names Information System (GNIS)
Pacific Ocean
State of California
Bodega Bay
Sonoma County
Salmon Creek
Coastal and Marine Ecological Classification Standard (CMECS)
Northern California Ecoregion
Coastal and Marine Ecological Classification Standard (CMECS)
Substrate
none
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the Center for Habitat Studies, Moss Landing Marine Laboratories, and the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigation purposes.
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060-5792
US
831-427-4747
pcmsc_data@usgs.gov
https://pubs.usgs.gov/ds/781/OffshoreBodegaHead/images/Habitat_OffshoreBodegaHead.jpg
Benthic habitat offshore Bodega Head.
JPEG
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.3.3600
Johnson, S.Y.
Dartnell, P.
Golden, N.E.
Hartwell, S.R.
Erdey, M.D.
Greene, H.G.
Cochrane, G.R.
Kvitek, R.G.
Manson, M.W.
Endris, C.A.
Dieter, B.E.
Watt, J.T.
Krisgman, L.M.
Sliter, R.W.
Lowe, E.N.
Chin, J.L.
2015
California State Waters Map Series--Offshore of Bodega Head, California
Open-File Report
2015-1140
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/ofr20151140
Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the lead authors and by the GIS technician(s) who created the digital database. Review drafts of the map were reviewed internally by at least two other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards.
Contact authors for information about omissions, selection criteria, generalization, definitions used, and other rules used to derive the data set.
Interpretation and polygon delineation of habitats performed at scales from 1:2000 to 1:5000
Peter Dartnell
Rikk G. Kvitek
2014
Bathymetry--Offshore of Bodega Head, California
raster digital data
Data Series
DS 781
Reston, VA
U.S. Geological Survey
See metadata for bathymetry ("Bathymetry_OffshoreBodegaHead_metadata.txt") in DS 781 for source data and postprocessing/reprocessing information.
https://pubs.usgs.gov/ds/781/OffshoreBodegaHead/data/Bathymetry_OffshoreBodegaHead.zip
digital file of gridded bathymetry data (ArcInfo GRID)
2007
2010
ground condition
bathymetry
Gridded bathymetry data (2-meter resolution)
Peter Dartnell
Rikk G. Kvitek
2014
Backscatter--Offshore of Bodega Head, California
raster digital data
Data Series
DS 781
Reston, VA
U.S. Geological Survey
See metadata for backscatter datasets ("BackscatterA_8101_OffshoreBodegaHead_metadata.txt", "BackscatterB_7125_OffshoreBodegaHead_metadata.txt" and "BackscatterC_Swath_OffshoreBodegaHead.txt") in DS 781 for amplitude source data and postprocessing/reprocessing information.
https://pubs.usgs.gov/ds/781/OffshoreBodegaHead/data/BackscatterA_8101_OffshoreBodegaHead.zip
https://pubs.usgs.gov/ds/781/OffshoreBodegaHead/data/BackscatterB_7125_OffshoreBodegaHead.zip
https://pubs.usgs.gov/ds/781/OffshoreBodegaHead/data/BackscatterC_Swath_OffshoreBodegaHead.zip
digital file of gridded amplitude data (ArcInfo GRID)
2007
2010
ground condition
backscatter
Gridded backscatter amplitude data (2-meter resolution)
Brian Edwards
Eleyne Phillips
Nadine Golden
Lisa Krigsman
Pete Dartnell
2014
L908NC_video_observations
Data Series
DS 781
Reston, VA
U.S. Geological Survey
See metadata for L0908NC video observations ("l908nc_video_observations_metadata.txt") in DS 781 for source data and postprocessing/reprocessing information.
https://pubs.usgs.gov/ds/781/video_observations/data/l908nc_video_observations.zip
vector digital data
20080811
20080822
ground condition
imagery
seafloor interpretations from underwater video and sediment samples
Data used for the creation of the potential marine benthic habitat interpretation consists of multibeam bathymetry, acoustic backscatter, sediment samples, camera-sled imagery, and existing geologic and seafloor interpretive maps. All data were compiled and displayed for interpretation using ESRI ArcGIS software, ArcMap v.10.0. The process consists of editing a shapefile within ArcMap, beginning with the construction of polygons to delineate benthic features. A benthic feature is an area with common characteristics which can be characterized as a single potential habitat type. The boundaries and extents of these features were determined from the bathymetric data. In general, interpretations were made at scales between 1:2,000 and 1:5,000. The USGS kindly provided the Center for Habitat Studies with a geodatabase consisting of feature datasets delineating geologic features and attributes for Drakes Bay and vicinity. Some of the delineated polygons were preserved as part of the potential marine benthic habitat characterization. However, the Greene and others (2007) code was used in attributing the dataset and additional polygons were added using the methods outlined below. High-resolution multibeam sonar data in the form of bathymetric depth grids (seafloor digital elevation models, referred to as the "bathymetry") were the primary data used in the interpretation of potential habitat types. Shaded-relief imagery ("hillshade") allows for visualization of the terrain and interpretation of submarine landforms. On the basis of these hillshades, areas of rock were identified by their often sharply defined edges and high relative relief; these may be contiguous outcrops, isolated parts of outcrop protruding through sediment cover (pinnacles), or isolated boulders. Although these types of features can be confidently characterized as exposed rock, it is not uncommon to find areas within or around the rocky feature that appear to be covered by a thin veneer of sediment. These areas are identified as "mixed" induration, containing both rock and sediment. Broad areas of the seafloor lacking sharp and angular characteristics are considered to be sediment. Sedimentary features may contain erosional or depositional characteristics recognizable in the bathymetry, such as dynamic bedforms (dunes or sand waves). General morphologic features such as scours, mounds, and depressions were also identified using the hillshade imagery. The combination of acoustic backscatter data and "ground truthed" sediment samples were used to delineate seafloor sediment types within areas identified as "soft (s)" induration. Initially, ground truth data, in the form of grab sample descriptions and average grain size measurements, were categorized into four grain-size categories: mud (m), muddy sand (s/m), sand (s), and sandy gravel (s/g). Backscatter data was then classified into four intensity categories (low, med, high, very high) that are assumed to correspond to relative grain sizes. The aim was to develop an intensity classification of the seafloor that correlated with the data collected from the sediment samples. Thus, the combination of remotely observed data (acoustic backscatter) and directly observed data (sediment grab samples) translates to higher confidence in our ability to interpret broad areas of the seafloor. Nonetheless, we caution against using our sediment type interpretations as anything more than "best-guess" because of the following issues: characterization of contiguous sediment bodies is a difficult procedure because even small areas can exhibit a wide spectrum of backscatter-intensity values that lack distinct boundaries; backscatter intensity can be affected by depth, vegetation, water column conditions, and seafloor relief; and directly observed sediment data, in the form of sediment samples, represents a very small area relative to remotely observed data, requiring broad areas of interpolation.
bathymetry
backscatter
imagery
2014
Added Distribution_Information section to metadata to facilitate data download.
20171005
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
20171005
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Added keywords from Coastal and Marine Ecological Classification Standard (CMECS) to metadata.
20180426
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
20201019
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Edited metadata to fix validation errors and to bring it up to FGDC CSDGM current standards based on data release policies for USGS Coastal and Marine Hazards and Resources Program (CMHRP). No data were changed. The metadata available from a harvester may supersede metadata bundled within a download file. Users are advised to compare the metadata dates to determine which metadata file is most recent.
20220725
U.S. Geological Survey
Susan Cochran
Geologist
Mailing and Physical
2885 Mission Street
Santa Cruz
CA
95060
831-460-7545
scochran@usgs.gov
Vector
GT-polygon composed of chains
963
WGS 1984 UTM Zone 10N
0.9996
-123.0
0.0
500000.0
0.0
coordinate pair
2
2
Meter
D WGS 1984
WGS 1984
6378137.0
298.257223563
Habitat_OffshoreBodegaHead
Polygons representing habitat map units
This report
OBJECTID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
ESRI
Coordinates defining the features.
Hab_Code
Habitat code
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 25
Hab_Type
Habitat type
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 100
Mega_ID
Megahabitat ID code
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 10
Mega
Megahabitat description
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 35
Ind_ID
Seafloor induration ID code
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 10
Ind
Seafloor induration description
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 35
Sed_ID
Sediment ID code
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 10
Sed
Sediment description
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 35
Mes_Mac_ID
Meso/Macro-habitat ID code
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 15
Mes_Mac
Meso/Macro-habitat description
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 50
Mod_ID
Habitat modifier ID code
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 15
Mod
Habitat modifier description
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 50
Hab_Desc
Habitat Description
Center for Habitat Studies, Greene and others (1999, 2007)
Names are in text form, maximum length: 200
Area
Polygon area in meters
ESRI Calculate Geometry (Area in square meters) tool
34.819099
62299230.1744
Float values in square meters
U.S. Geological Survey
mailing and physical address
345 Middlefield Rd
Menlo Park
CA
94025-3561
USA
(650) 329-4309
The .zip file (Habitat_OffshoreBodegaHead.zip) includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as FGDC-compliant metadata for the habitats data layer of Offshore Bodega Head, California.
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
shapefile
ArcMap (version 10.0, ESRI, 2011)
Point, line, and polygon features are in shapefile format and are projected in UTM Zone 10 coordinates.
The .zip file includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as FGDC-compliant metadata for the habitats data layer of Drakes Bay and vicinity, California.
WinZip
0.6
https://pubs.usgs.gov/ds/781/OffshoreBodegaHead/data/Habitat_OffshoreBodegaHead.zip
https://pubs.usgs.gov/ds/781/OffshoreBodegaHead/data_catalog_OffshoreBodegaHead.html
https://doi.org/10.3133/ds781
The first link will begin a direct download of the data. The second link is a landing page on which all of the downloadable data for a particular region are listed. The third link is a landing page for the entire data catalog.
none
20220725
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060-5792
US
831-427-4747
pcmsc_data@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
local time