Location of mosaicked seafloor photos extracted from videotape, San Pedro shelf, southern California - VIDMOSFOOT.SHP

Metadata also available as

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Eleyne L. Phillips

Originator: Peter Dartnell

Originator: Florence L. Wong

Publication_Date: 2012

Title:

Location of mosaicked seafloor photos extracted from videotape, San Pedro shelf, southern California - VIDMOSFOOT.SHP

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 552

Publication_Information:

Publication_Place: Menlo Park, CA
Publisher: U.S. Geological Survey

Online_Linkage: <https://pubs.usgs.gov/ds/552/>

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: <https://pubs.usgs.gov/ds/552/>

Description:

Abstract:

Vidmosfoot.shp is a GIS file that shows the location of seafloor photographs extracted from videotape (collected September 2004, O-1-04-SC) and mosaicked into continuous strips.
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) software to display geologic and oceanographic information.

Supplemental_Information:

Additional information about the field activities from which this data set was derived are available online at

 <http://walrus.wr.usgs.gov/infobank/o/o104sc/html/o-1-04-sc.meta.html>

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 ArcInfo format, this metadata file may include some ArcInfo-specific terminology.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2004

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -118.338133
East_Bounding_Coordinate: -117.949982
North_Bounding_Coordinate: 33.715607
South_Bounding_Coordinate: 33.562234

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
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_Keyword: sediment grain size

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: None

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Florence L. Wong

Contact_Address:

Address_Type: mailing address
Address: 345 Middlefield Road Mail Stop 999
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA

Contact_Voice_Telephone: 650-329-5327

Contact_Electronic_Mail_Address: fwong@usgs.gov

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500

Cross_Reference:

Citation_Information:

Originator: Robert L. Folk

Publication_Date: 1980

Title: Petrology of Sedimentary Rocks

Edition: 1980

Geospatial_Data_Presentation_Form: document

Publication_Information:

Publication_Place: Austin TX
Publisher: Hemphill Publishing Co.

Data_Quality_Information:

Logical_Consistency_Report: Point features present.

Completeness_Report: Complete.

Lineage:

Process_Step:

Process_Description:: In October 2004, 365 line-kilometers of seafloor video and over 13,000 photographs were collected over the entire San Pedro Shelf. A 2 m by 1 m camera sled was towed about 2 m off bottom at a speed of about 2 knots. The sled consisted of one forward-looking video camera and one vertical video camera, each with paired lasers for estimating scale, one 6-megapixel camera, and flood lights. Both videos were streamed to the ship in real time for observation on TV monitors and recorded on MiniDV tapes. Navigational information including GMT (Greenwich Mean Time) and geographic coordinates were superimposed on the video and recorded onto the second channel of the MiniDV tapes.
Video segments were captured from the MiniDV tapes using Adobe Premiere software and saved in AVI video format. Geographic coordinates of prominent features on the sea floor were recorded usually and the beginning and end of the video segment.
Using a suite of programs developed by Dr. Yuri Rzhanov, University of New Hampshire (UNH), Center for Coastal and Ocean Mapping through a cooperative USGS - UNH agreement, the video frames were sub-sampled every 2 to 15 frames depending on the camera sled speed over the sea floor. The video frame was cropped depending on lighting and super-imposed text. Frame-to-frame offset measures were calculated using pattern recognition. Finally, each frame was stitched to the previous frame using the offset values that resulting in a bitmap (BMP) image.
The BMP image was converted to a TIFF image and geo-referenced using standard GIS techniques with the recorded geographic coordinates.
The shapefile vidmosfoot.shp consists of the outlines of the mosaicked images.
Process_Date: 2007

Process_Step:

Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: d:\temp\xml54.tmp
Process_Date: 20120829
Process_Time: 13561100

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 183

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

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

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.00001
Ordinate_Resolution: 0.00001

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: vidmosfoot
Entity_Type_Definition: outline of mosaicked seafloor images
Entity_Type_Definition_Source: this study

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI