Metadata: Identification_Information: Citation: Citation_Information: Originator: United States Geological Survey (USGS) Originator: Peter Dartnell Originator: Brian Edwards Publication_Date: 2012 Title: Geologic character of the inner San Pedro Shelf seafloor, southern California (inner_shelf_character.tif) Geospatial_Data_Presentation_Form: ERDAS Imagine (.img) and TIFF image Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: Florence L. Wong Originator: Brian D. Edwards Originator: Peter Dartnell Originator: Eleyne L. Phillips Publication_Date: 2012 Title: Seafloor Geology and Benthic Habitats of the San Pedro shelf, southern California Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Digital Series Issue_Identification: 552 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/ds/552/ Description: Abstract: INNER_SHELF_CHARACTER.TIF is a raster image showing seafloor geologic character of the inner San Pedro shelf, southern California, as interpreted from sonar images, multibeam bathymetry, seafloor video and photos, and from sediment sampling. Data resolutions is 4m. The outer part of the shelf is mapped in an accompanying dataset outer_shelf_character.img with a resolution of 16m. This data set is one of a collection of digital files of a geographic information system (GIS) of spatially referenced data related to the study of seafloor geology and benthic habitats of the San Pedro shelf off southern California. The San Pedro shelf study area covers approximately 400 sq km offshore of the metropolitan Los Angeles area out to a water depth of about 150 m (492 ft). The seafloor hosts a rich and varied biologic community and is subject to anthropogenic inputs from shipping traffic, sewage outfall systems, commercial fisheries, and recreational use. Between 1998 and 2004, the U.S. Geological Survey (in cooperation with Los Angeles and Orange County Sanitation Districts) mapped the seafloor with sonar technologies, collected video and still photography, and collected sediment samples to develop a characterization of this shelf area. 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 the seafloor character map of the San Pedro Shelf, southern California. Supplemental_Information: Information for USGS Coastal and Marine Geology related activities are online at > http://walrus.wr.usgs.gov/infobank/a/a398sc/html/a-3-98-sc.meta.html > http://walrus.wr.usgs.gov/infobank/c/c199sc/html/c-1-99-sc.meta.html > http://walrus.wr.usgs.gov/infobank/o/o104sc/html/o-1-04-sc.meta.html > http://walrus.wr.usgs.gov/infobank/e/e204sc/html/e-2-04-sc.meta.html Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -118.33813 East_Bounding_Coordinate: -117.95043 North_Bounding_Coordinate: 33.71202 South_Bounding_Coordinate: 33.56497 Keywords: Theme: Theme_Keyword_Thesaurus: GCMD DIF, Version 5.0a, September 1996: Parameter Keywords Theme_Keyword: Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry Theme_Keyword: Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Marine Geology Theme_Keyword: Multibeam Theme_Keyword: Bathymetry Theme_Keyword: Water Depth Theme_Keyword: Seafloor Topography Theme_Keyword: Seafloor Character Theme_Keyword: benthic habitat Theme_Keyword: coastal shelf Theme_Keyword: coastal geology Theme_Keyword: seafloor geology Theme_Keyword: seafloor character Theme_Keyword: seafloor habitat Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: environment Theme_Keyword: geoscientificInformation Theme_Keyword: oceans Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: San Pedro, California Place_Keyword: San Pedro Bay, California Place_Keyword: Long Beach, California Place_Keyword: Los Angeles, California Place_Keyword: Los Angeles Harbor, California Place_Keyword: Long Beach Middle Harbor, California Place_Keyword: Seal Beach, California Place_Keyword: California Place_Keyword: USA Place: Place_Keyword_Thesaurus: GEOnet Names Server Place_Keyword: north Pacific Ocean Place: Place_Keyword_Thesaurus: none Place_Keyword: San Pedro shelf, southern California Access_Constraints: None Use_Constraints: Please recognize the U.S. Geological Survey (USGS) 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: Peter Dartnell Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology (CMG) Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: USGS, MailStop 999, 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-5460 Contact_Facsimile_Telephone: (650) 329-5411 Contact_Electronic_Mail_Address: pdartnell@usgs.gov Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Not applicable for raster data. Logical_Consistency_Report: Unspecified Completeness_Report: Complete Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: 4 meters Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: 0.05 percent of the water depth. Depths corrected to mean lower low water datum. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Gardner, J.V., Hughes-Clarke, J.E., and Mayer, L.A. Publication_Date: 1999 Title: Cruise Report: RV Coastal Suveryor Cruise C-1-99-SC, Multibeam Mapping of the Long Beach, California, Continental Shelf Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of99-360/ Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Gardner and others, 1999 Source_Contribution: data collection methods and data Source_Information: Source_Citation: Citation_Information: Originator: Gardner, J.V., and Mayer, L.A. Publication_Date: 1998 Title: Cruise Report: RV Ocean Alert Cruise A2-98-SC, Mapping the Southern California Continental Margin Other_Citation_Details: Cruise ID should be A-3-98-SC not, A-2-98-SC Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of98-475/ Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Gardner and Mayer, 1998 Source_Contribution: data collection methods and data Source_Information: Source_Citation: Citation_Information: Originator: Dartnell, P., and Gardner, J.V. Publication_Date: 2004 Title: Predicting seafloor facies from multibeam bathymetry and backscatter data Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Photogrammetric Engineering and Remote Sensing Issue_Identification: Vol. 70, No.9, pp 1081-1091 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Dartnell and Gardner, 2004a Source_Contribution: methods description Source_Information: Source_Citation: Citation_Information: Originator: Dartnell, P., and Gardner, J.V. Publication_Date: 2004 Title: Predicted Seafloor Facies of Central Santa Monica Bay, California Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: USGS Open-File Report Issue_Identification: 2004-1081 Online_Linkage: http://pubs.usgs.gov/of/2004/1081/ Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Dartnell and Gardner, 2004b Source_Contribution: methods description Process_Step: Process_Description: The San Pedro shelf was mapped over a two-year period using two different multibeam echo-sounding systems (MBES). In 1998, the outer mainland shelf and slope were mapped using a Kongsberg EM300 MBES (30kHz) (A-3-98-SC; Gardner and others, 1998). In 1999, the inner mainland shelf from the Palos Verdes Peninsula south to Dana Point was mapped using a Kongsberg EM3000D MBES (300kHz) (C-1-99-SC; Gardner and others, 1999; Dartnell and Gardner, 2004a, 2004b). Process_Date: 1998-1999 Process_Step: Process_Description: In October 2004, 365 line kilometers of sea floor video and over 13,000 photographs were collected over the entire shelf (O-1-04-SC) and in December 2004, 182 sediment samples were collected over the shelf (E-2-04-SC). Process_Date: 2004 Process_Step: Process_Description: A hierarchical decision-tree classification scheme (ERDAS Imagine) was used to classify the multibeam bathymetry and backscatter data into a seafloor character map - rock or hardground, bioturbated sand, sand with bedforms and shell hash, bioturbated muddy sand, and bioturbated sandy mud. Seafloor video, photographs, real-time observations, and the sediment textural data were all used to develop, test, and refine rules in the hierarchical decision-tree classification scheme. The final interpreted map was saved and exported into the Imagine (.img) and TIFF (.tif) formats available in this report. Process_Date: 2005 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter Dartnell Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology (CMG) Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: USGS, MailStop 999, 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-5460 Contact_Facsimile_Telephone: (650) 329-5411 Contact_Electronic_Mail_Address: pdartnell@usgs.gov Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: d:\temp\xml2B0.tmp Process_Date: 20120827 Process_Time: 08302100 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 5189 Column_Count: 12406 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 4.0 Ordinate_Resolution: 4.0 Planar_Distance_Units: Meters Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 11 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -117.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Geodetic_Model: Horizontal_Datum_Name: WGS84 Ellipsoid_Name: WGS84 Semi-major_Axis: 6378137.00 meters Denominator_of_Flattening_Ratio: 0.003352811 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: facies_innershelf.img.vat Entity_Type_Definition: raster value attribute table Entity_Type_Definition_Source: ERDAS Attribute: Attribute_Label: OID 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: Value Attribute_Definition: internal sequence number Attribute_Definition_Source: ERDAS Imagine Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Class_name Attribute_Definition: assigned character description Attribute_Definition_Source: this study. Attribute_Domain_Values: Unrepresentable_Domain: Descriptive name assigned to seafloor characteristics: undefined; rugose rock; sand; mixed rock, sand; muddy sand; coarser sand, shell material. Attribute: Attribute_Label: Red Attribute_Definition: red component of RGB value for pixel Attribute_Definition_Source: ERDAS Imagine Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: Green Attribute_Definition: red component of RGB value for pixel Attribute_Definition_Source: ERDAS Imagine Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: Blue Attribute_Definition: blue component of RGB value for pixel Attribute_Definition_Source: ERDAS Imagine Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: Opacity Attribute_Definition: Opacity Attribute_Definition_Source: ERDAS Imagine Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: not opaque Enumerated_Domain_Value_Definition_Source: ERDAS Imagine Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: opaque Enumerated_Domain_Value_Definition_Source: ERDAS Imagine Attribute: Attribute_Label: Hypothesis Attribute_Definition: numeric value applied to Class_name Attribute_Definition_Source: this study Attribute_Domain_Values: Unrepresentable_Domain: Descriptive name assigned to seafloor characteristics: 0 undefined; 1 rugose rock; 2 sand; 3 mixed rock, sand; 4 muddy sand; 5 coarser sand, shell material. Attribute: Attribute_Label: Count Attribute_Definition: Pixel count in category Attribute_Definition_Source: ERDAS Imagine Attribute_Domain_Values: Unrepresentable_Domain: pixel count of class or category Overview_Description: Entity_and_Attribute_Overview: Facies_innershelf.img is an ERDAS Imagine image with the following attributes: red: rock or high relief beige: sand yellow: coarse, clean sand green: muddy sand Entity_and_Attribute_Detail_Citation: This study. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: United States Geological Survey (USGS) Information Services Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Rd., MS-999 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: (650)329-5460 Resource_Description: Downloadable Data 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, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: TIFF Format_Specification: zip file containing raster image, world, and metadata files File_Decompression_Technique: unzip Transfer_Size: 66 MB Format_Version_Number: 42 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/ds/552/ Fees: None Metadata_Reference_Information: Metadata_Date: 2012 Metadata_Review_Date: 2010 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology (CMG) Contact_Person: Florence Wong Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: USGS, MailStop 999, 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-5327 Contact_Electronic_Mail_Address: fwong@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata ("CSDGM version 2") Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: universal time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile