50-Foot Bathymetric Contours: California, Continental Shelf, 2000 - California. Department of Fish and Game. Marine Resources Region; National Ocean Service Hydrographic Surveys (California Department of Fish and Wildlife GIS Maps & Data, 2001)
This polyline shapefile depicts bathymetric contour line coverage for California that generally covers the continental shelf at 50 foot contour resolution. The contours were developed by interpolating National Ocean Service (NOS) Hydrographic Survey depth points. The TopoGrid algorithm within ArcInfo software was the primary gridding interpolation procedure, followed by a standard contouring routine. The contours are one possible interpretation based on chosen contouring procedures.
The purpose of this contour map is to visualize changes in ocean depths relative to sea level in the nearshore California continental shelf, which is the portion of the continent beneath the ocean’s surface. The bathymetric measurements used here refer to the study of water depths only and do not include the underwater, or submarine, topography of the ocean floor except as it relates to water depths. These data are not suitable for navigation purposes.
California Department of Fish and Wildlife. (2001). 50-Foot Bathymetric Contours: California, Continental Shelf, 2000. Marine Region GIS Lab. Available at: http://purl.stanford.edu/kd180vp0173.
Converted to California Teale Albers NAD83 by the California Department of Fish and Game --BEGIN ORIGINAL METADATA - THIS INFORMATION MAY NOT BE CURRENT-- Identification_Information: Citation: Citation_Information: Originator: National Oceanic and Atmospheric Administration, National Ocean Service Originator: Teale Data Center GIS Solutions Group Originator: California Department of Fish and Game Publication_Date: 2001 Title: California Nearshore Contour Bathymetry - 50 foot contours Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: \\Molib01\GIS_Library\Elevation\Water\Contours\nbath50f Description: Abstract: Bathymetric contour lines for California that generally cover the continental shelf at 50 foot contour resolution. The data is in DRAFT form, subsequent to later revisions. Purpose: Assess ocean depths. Supplemental_Information: Converted to California Teale Albers NAD83 by the California Department of Fish and Game -- BEGIN ORIGINAL METADATA - THIS INFORMATION MAY NOT BE CURRENT -- CALIFORNIA DEPARTMENT OF FISH AND GAME (DFG) GIS METADATA California Nearshore Contour Bathymetry - 50 foot contours DRAFT Version produced by Teale Data Center GIS Solutions Group COVERAGE NAME: nbath50f METADATA FILE: nbath50f.txt METADATA DATE: 1999.12.09 COVERAGE DESCRIPTION: Nbath50f is a bathymetric contour line coverage for California that generally covers the continental shelf at 50 foot contour resolution. The data is in DRAFT form, subsequent to later revisions by the Teale Data Center GIS Solutions Group and the DFG GIS program. The contours were developed by interpolating National Ocean Service (NOS) Hydrographic Survey depth points. The TopoGrid algorithm within ArcInfo software was the primary gridding interpolation procedure, followed by a standard contouring routine. More details will be provided when a final version is complete. The coverage is not suitable for navigation. The contours are one possible interpretation based on chosen contouring procedures. The Teale Data Center and the California Department of Fish and Game make no warranty as to the suitability of this data for any purpose. VITAL STATISTICS: Standard Teale Parameters? [x] YES; [ ] NO Datum: NAD 27 Projection: Albers Units: Meters 1st Std. Parallel: 34 00 00 (34.0 degrees N) 2nd Std. Parallel: 40 30 00 (40.5 degrees N) Longitude of Origin: -120 00 00 (120.0 degrees W) Latitude of Origin: 00 00 00 (0.0 degrees N) False Easting (X shift): 0 False Northing (Y shift): -4,000,000 Source: National Ocean Service Hydrographic Surveys Source Media: digital file Data Structure: vector ARC/INFO Coverage Type: point ARC/INFO Precision: single ARC/INFO Tolerances: fuzzy= 116.339; dangle= 0.0 Number of Features: arcs: 8293 File Size: appx. 4.9 MB as ARC/INFO uncompressed export file (.e00) DATA DICTIONARY: Structure for NBATH50F.AAT COL ITEM NAME WIDTH TYPE N.DEC DESCRIPTION 1 FNODE# 4 B - ARC/INFO default 5 TNODE# 4 B - ARC/INFO default 9 LPOLY# 4 B - ARC/INFO default 13 RPOLY# 4 B - ARC/INFO default 17 LENGTH 8 F 5 ARC/INFO default 25 EEZBATH# 4 B - ARC/INFO default 29 EEZBATH-ID 4 B - ARC/INFO default 33 DEPTH 4 F 3 Depth in feet UPDATES: 2001.12.18 - Manual fix for area offshore from Trindad, other miscellaneous edits. DFG CONTACTS: Will Patterson, DFG GIS Analyst 916-323-1484, Email: wpatters@dfg.ca.gov -- END ORIGINAL METADATA -- Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: unknown Ending_Date: unknown Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -124.796869 East_Bounding_Coordinate: -116.558824 North_Bounding_Coordinate: 42.521172 South_Bounding_Coordinate: 31.993465 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: elevation Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme_Keyword: bathymetry Place: Place_Keyword_Thesaurus: none Place_Keyword: California Access_Constraints: none Use_Constraints: none Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 3; ESRI ArcCatalog 8.3.0.800 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 8397 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 4 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 34.000000 Standard_Parallel: 40.500000 Longitude_of_Central_Meridian: -120.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 0.000000 False_Northing: -4000000.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.002334 Ordinate_Resolution: 0.002334 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: nbath50f.aat Attribute: Attribute_Label: FID 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: FNODE# Attribute_Definition: Internal node number for the beginning of an arc (from-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: TNODE# Attribute_Definition: Internal node number for the end of an arc (to-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LPOLY# Attribute_Definition: Internal node number for the left polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: RPOLY# Attribute_Definition: Internal node number for the right polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LENGTH Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: NBATH50F# 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: NBATH50F-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: DEPTH Distribution_Information: Resource_Description: Downloadable Data Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 1.407 Metadata_Reference_Information: Metadata_Date: 20030929 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: California Department of Fish and Game Contact_Person: GIS Service Center Contact_Address: Contact_Electronic_Mail_Address: geodata@dfg.ca.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile --END ORIGINAL METADATA--
This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Rights: This item is in the public domain. There are no restrictions on use.
Rights: This work is in the Public Domain, meaning that it is not subject to copyright.
Keywords: Geospatial data; cartographic dataset; Coasts; Continental shelf; Digital elevation models; Contours (Cartography); Remote sensing; Bathymetric maps; California; Pacific Ocean; 2000; Elevation; Oceans