Habitat--Offshore of San Francisco, California

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: C.A. Endris
Originator: H.G. Greene
Originator: B.E. Dieter
Originator: Center for Habitat Studies, Moss Landing Marine Laboratories
Publication_Date: 2014
Title: Habitat--Offshore of San Francisco, California
Geospatial_Data_Presentation_Form: polygon shapefile digital data
Larger_Work_Citation:
Citation_Information:
Originator: Nadine E. Golden
Publication_Date: 2013
Title: California State Waters Map Series Data Catalog
Geospatial_Data_Presentation_Form: database
Series_Information:
Series_Name: Data Series
Issue_Identification: DS 781
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/ds/781/
Description:
Abstract:
This part of DS 781 presents data for the habitat map of the seafloor of the Offshore of San Francisco map area, California. The vector data file is included in "Habitat_SanFrancisco.zip," which is accessible from http://pubs.usgs.gov/ds/781/OffshoreSanFrancisco/data_catalog_OffshoreSanFrancisco.html.
Using multibeam echosounder (MBES) bathymetry and backscatter data, potential marine benthic habitat maps were constructed. 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. Rugged, high-relief, rocky outcrops that have been eroded to form ledges and small caves are ideal habitat for rockfish (Sebastes spp.) and other bottom fish such as lingcod (Ophiodon elongatus). Habitat map is presented in a map format generated in a GIS (ArcMap), and both digital and hard-copy versions will be produced.
Purpose:
This work is one of nine potential marine benthic habitat maps characterized after Greene and others (1999, 2007). These maps will be interpreted from MBES data collected by the CSMP along the coast of central California. This information is not intended for navigational purposes.
Supplemental_Information:
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 offshore San Francisco. 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. Please refer to Greene and others (2007) for more information regarding the Benthic Marine Potential Habitat Classification Scheme and the codes used to represent various seafloor features.
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.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2013
Currentness_Reference: Publication Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: none planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -122.617704
East_Bounding_Coordinate: -122.415778
North_Bounding_Coordinate: 37.857326
South_Bounding_Coordinate: 37.697159
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:78c3d01d-7371-4588-9359-4d6fa37ee9eb
Theme:
Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: Oceans > Bathymetry/SeafloorTopography > Bathymetry
Theme_Keyword: Oceans > Bathymetry/SeafloorTopography > Seafloor Topography
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificinformation
Theme_Keyword: environment
Theme_Keyword: oceans
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: Multibeam bathymetry
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Benthic marine habitat
Theme_Keyword: Seafloor mapping
Theme_Keyword: Offshore geology
Theme_Keyword: GIS
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: distributions
Theme_Keyword: physical habitats and geomorphology
Theme_Keyword: habitat
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: seabed
Theme_Keyword: habitats
Theme_Keyword: benthos
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sea-floor characteristics
Theme_Keyword: habitats
Theme_Keyword: benthos
Theme:
Theme_Keyword_Thesaurus: Coastal and Marine Ecological Classification Standard (CMECS)
Theme_Keyword: Marine Nearshore Subtidal
Theme_Keyword: Marine Offshore Subtidal
Theme_Keyword: Transform Continental Margin
Theme_Keyword: Continental/Island Shelf
Theme_Keyword: Rock Substrate
Theme_Keyword: Unconsolidated Mineral Substrate
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: California
Place_Keyword: San Francisco County
Place_Keyword: San Francisco
Place:
Place_Keyword_Thesaurus: Coastal and Marine Ecological Classification Standard (CMECS)
Place_Keyword: Northern California Ecoregion
Stratum:
Stratum_Keyword_Thesaurus: Coastal and Marine Ecological Classification Standard (CMECS)
Stratum_Keyword: Substrate
Access_Constraints:
If physical samples or materials are available, constraints on their on-site access are described in "WR CMG Sample Distribution Policy" at URL: http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html
Use_Constraints:
This information is not intended for navigational purposes.
Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data.
Acknowledge the Center for Habitat Studies, Moss Landing Marine Laboratories in products derived from these data. Share data products developed using these data with the U.S. Geological Survey.
This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Center for Habitat Studies, Moss Landing Marine Laboratories
Contact_Person: H. Gary Greene
Contact_Position: Geologist/Principal Investigator
Contact_Address:
Address_Type: physical address
Address: Center for Habitat Studies
City: Moss Landing Marine Labs
State_or_Province: CA
Postal_Code: 95039
Country: USA
Contact_Voice_Telephone: (831) 771-4141
Contact_Facsimile_Telephone: (831) 633-7264
Contact_Electronic_Mail_Address: greene@mlml.calstate.edu
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description: Benthic habitat offshore San Francisco.
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.3.3600
Data_Quality_Information:
Logical_Consistency_Report:
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.
Completeness_Report:
Contact authors for information about omissions, selection criteria, generalization, definitions used, and other rules used to derive the data set.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Interpretation and polygon delineation of habitats performed at scales from 1:2000 to 1:5000
Lineage:
Process_Step:
Process_Description:
Interpretation and polygon delineation of habitats performed at scales from 1:2000 to 1:5000.
Process_Date: 2012
Process_Step:
Process_Description:
Added Distribution_Information section to metadata to facilitate data download.
Process_Date: 20171005
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Alan O. Allwardt
Contact_Position: Contractor -- Information Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-460-7551
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: aallwardt@usgs.gov
Process_Step:
Process_Description:
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
Process_Date: 20171005
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Alan O. Allwardt
Contact_Position: Contractor -- Information Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-460-7551
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: aallwardt@usgs.gov
Process_Step:
Process_Description:
Added keywords from Coastal and Marine Ecological Classification Standard (CMECS) to metadata.
Process_Date: 20180426
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Alan O. Allwardt
Contact_Position: Contractor -- Information Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-460-7551
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: aallwardt@usgs.gov
Process_Step:
Process_Description:
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
Process_Date: 20201019
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 961
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: WGS 1984 UTM Zone 10N
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -117.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001
Planar_Distance_Units: Meter
Geodetic_Model:
Horizontal_Datum_Name: D WGS 1984
Ellipsoid_Name: WGS 1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Habitat_OffshoreSanFrancisco
Entity_Type_Definition: Polygons representing habitat map units
Entity_Type_Definition_Source: This report
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: Hab_Code
Attribute_Definition: Habitat code
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 20
Attribute:
Attribute_Label: Hab_Type
Attribute_Definition: Habitat type
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 50
Attribute:
Attribute_Label: Mega_ID
Attribute_Definition: Megahabitat ID code
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 10
Attribute:
Attribute_Label: Mega
Attribute_Definition: Megahabitat description
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 35
Attribute:
Attribute_Label: Ind_ID
Attribute_Definition: Seafloor induration ID code
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 15
Attribute:
Attribute_Label: Ind
Attribute_Definition: Seafloor induration description
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 35
Attribute:
Attribute_Label: Sed_ID
Attribute_Definition: Sediment ID code
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 15
Attribute:
Attribute_Label: Sed
Attribute_Definition: Sediment description
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 35
Attribute:
Attribute_Label: Mes_Mac_ID
Attribute_Definition: Meso/Macro-habitat ID code
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 35
Attribute:
Attribute_Label: Mes_Mac
Attribute_Definition: Meso/Macro-habitat description
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 50
Attribute:
Attribute_Label: Mod_ID
Attribute_Definition: Habitat modifier ID code
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 35
Attribute:
Attribute_Label: Mod
Attribute_Definition: Habitat modifier description
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 50
Attribute:
Attribute_Label: Slope_ID
Attribute_Definition: Slope modifier ID code
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 5
Attribute:
Attribute_Label: Slope
Attribute_Definition: Slope description
Attribute_Definition_Source: Center for Habitat Studies, Greene and others (1999, 2007)
Attribute_Domain_Values:
Unrepresentable_Domain: Names are in text form, maximum length: 35
Attribute:
Attribute_Label: Area_m
Attribute_Definition: Polygon area in meters
Attribute_Definition_Source: ESRI Calculate Geometry (Area in square meters) tool
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 7.104623
Range_Domain_Maximum: 61168464.026
Attribute_Units_of_Measure: Float values in square meters
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 345 Middlefield Rd
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025-3561
Country: USA
Contact_Voice_Telephone: (650) 329-4309
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://pubs.usgs.gov/ds/781/
Fees: none
Metadata_Reference_Information:
Metadata_Date: 20201019
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Center for Habitat Studies, Moss Landing Marine Laboratories
Contact_Person: Charlie Endris
Contact_Position: Geologist/GIS Analyst
Contact_Address:
Address_Type: mailing and physical address
Address: 8272 Moss Landing Rd.
Address: Center for Habitat Studies, Moss Landing Marine Laboratories
City: Moss Landing
State_or_Province: CA
Postal_Code: 95039
Country: US
Contact_Voice_Telephone: 831-771-4141
Contact_Facsimile_Telephone: 831-633-7264
Contact_Electronic_Mail_Address: cendris@mlml.calstate.edu
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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