SWWA98_500SP: Southwest Washington, 500 meter, 1926/1998 Bathymetry Grid, Stateplane Projection

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Informat ion
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information
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Identification_Information:

Citation:

Citation_Information:

Originator: Gibbs, Ann E.

Publication_Date: 20001018

Title:

SWWA98_500SP: Southwest Washington, 500 meter, 1926/1998 Bathymetry Grid, Stateplane Projection

Edition: Version 1.0

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place: Menlo Park, CA

Publisher: U.S. Geological Survey (USGS)

Description:

Abstract:

SWWA98_500SP is a digital bathymetric surface grid of the seafloor off the Coast of Southwest Washington and Northwest Oregon. Grid cell spacing is 500m and the projection is Washington State Plane South, Zone 5626. The surface grid was produced by merging National Ocean Service (NOS) hydrographic surveys conducted between 1926 and 1927 with recent surveys conducted by the U.S. Army Corps of Engineers (USACE) in 1998 around the entrances to Grays Harbor, Willapa Bay, and the Columbia River. The results of this work represent the best available estimate of the seafloor morphology for the time period circa 1998. The user is cautioned, however, to use this data set with full knowledge of the original intent, the limitations, and assumptions used to generate it.

Purpose:

This bathymetric surface grid is intended for use as a modern bathymetric base map for scientific research. It is not intended for navigational purposes. The grid was originally intended for use in wave modelling experiments as part of the Southwest Washington Coastal Erosion Study (SWCES), a cooperative study by the US Geological Survey and the Washington State Department of Ecology.

Supplemental_Information:

The SWCES was initiated to examine coastal geology, processes, and natural hazards within the Columbia River littoral cell. The study is jointly directed by the U.S. Geological Survey Coastal and Marine Geology Program and the Washington State Department of Ecology Shorelands and Environmental Assistance Program, with active participation of local communities in Pacific and Grays Harbor counties. Related USGS work in the Southwest Washington Coastal Erosion Study can be found online at: <http://www.ecy.wa.gov/progra ms/sea/swce/>

The grid described here is part of a data release of sixteen similar bathymetric grids. These include: 1926 and 1926-1998 merged Oregon/Washington (ORWA) and Southwest Washington study area (SWWA) grids, each at 500m and 750m grid spacing, in UTM Zone 10 (meters) and Washington State Plane South Zone 5626 (meters) projections. The ORWA data set extends from Heceta Head, Oregon to Cape Johnson, Washington, from the shoreline to about 2000m water depth; the SWWA data set extends from Tillamook Head Oregon to Pt. Grenville WA, from the shore to approximately 700m water depth.

The data used to create this bathymetric grid were collected between 1926 and 1998. Most data were collected between 1926 and 1927. Refer to Gibbs and others, 2000 for details.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1926

Ending_Date: 1998

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -124.60555752

East_Bounding_Coordinate: -123.74429957

North_Bounding_Coordinate: 47.34341758

South_Bounding_Coordinate: 45.86313190

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Coastal Geology

Theme_Keyword: Marine Geology

Theme_Keyword: Bathymetry

Theme_Keyword: Hydrographic Data

Theme_Keyword: Southwest Washington Coastal Erosion Study

Theme_Keyword: Columbia River Littoral Cell

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Southwest Washington

Place_Keyword: Northwest Oregon

Place_Keyword: Washington

Place_Keyword: Oregon

Place_Keyword: Grays Harbor

Place_Keyword: Willapa Bay

Place_Keyword: Columbia River

Place_Keyword: Pacific Ocean

Place_Keyword: Pacific Northwest

Place_Keyword: USA

Access_Constraints: None

Use_Constraints:

Please recognize the U.S. Geological Survey (USGS) as the source of this information.

Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.

This information is not intended for navigational purposes.

Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Feel free to use the data but please cite this publication: Gibbs, A.E., Buijsman, M.C., and Sherwood, C.R., 2000, Non-navigational Gridded Bathymetry Data : The Washington-Oregon Coast, 1926-1998; A data release and description of methods. USGS Open-File-Report OF 00-448.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

United States Geological Survey (USGS), Coastal and Marine Geology (CMG)

Contact_Person: Ann E. Gibbs

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing 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) 329-5060

Contact_Facsimile_Telephone: (650) 329-5190

Contact_Electronic_Mail_Address: agibbs@usgs.gov

Data_Set_Credit:

The authors would like to thank Eric Nelson of the Seattle District Army Corps of Engineers for the Grays Harbor and Willapa Bay survey data, and H. Rod Moritz of the Portland District Corps for Columbia River entrance surveys.

This Program is jointly funded by the Washington State Department of Ecology and the US Geological Survey, Coastal & Marine Geology Program.

Native_Data_Set_Environment:

SunOS UNIX, ARC/INFO version 7.2.1, SURFER V.6

Cross_Reference:

Citation_Information:

Originator: Ann E. Gibbs and Guy Gelfenbaum

Publication_Date: 1999

Title: Bathymetric change off the Washington/Oregon Coast

Series_Information:

Series_Name: Coastal Sediments '99

Issue_Identification:

Proceedings of the 4th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes

Cross_Reference:

Citation_Information:

Originator: Gibbs, A.E., Buijsman, M.C., and Sherwood, C.R.,

Publication_Date: 2000

Title:

Non-navigational Gridded Bathymetry Data : The Washington-Oregon Coast, 1926-1998; A data release and description of methods

Series_Information:

Series_Name: USGS Open-File-Report

Issue_Identification:

OF 00-448

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Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The data have been thoroughly analyzed for for gross inaccuracies. A discussion of errors and accuracies associated with the original data collection methodologies can be found in Gibbs and Gelfenbaum (1999).

Logical_Consistency_Report:

Only NOS sounding data with an original cartographic code of 711 are included. The data set was rigorously edited of obviously erroneous points.

Completeness_Report:

Gaps in the hydrographic survey point data exists west of Willapa Bay from approximately -124.034 to -124.363 degrees longitude and 46.573 to 46.738 degrees latitude and northwest of Tillamook Bay from approximately -123.834 to -124.120 longitude and 45.472 to 45.626 latitude. The remaining data are considered complete.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal accuracies for NOS surveys vary by water depth and distance from shore (see Gibbs and Gelfenbaum, 1999). Modern ACE surveys used DGPS and RTK positioning and have an accuracy of less than one meter.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Vertical accuracies for NOS surveys vary by water depth and distance from shore (see Gibbs and Gelfenbaum, 1999). Modern ACE surveys used single-beam digital fathometers, RTK tides, heave and swell compensator, and have an accuracy of less than one/half meter.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: National Geophysical Data Center

Publication_Date: 1998

Title:

National Ocean Service Hydrographic Survey Data: US Coastal Waters. CD-ROM Set, Version 4.0. Data announcement 98-MGG-03. World Data Center for Marine Geology & Geophysics, Boulder CO

Type_of_Source_Media: CD-ROM

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1926

Ending_Date: 1974

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: NOS_HSD

Source_Contribution: All pre-1998 hydrographic data were obtained from this source.

Process_Step:

Process_Description: See Gibbs, A.E., 2000 for additional information

Process_Date: 1999

Source_Information:

Source_Citation:

Citation_Information:

Originator: US Army Corps of Engineers; Seattle District

Publication_Date: Unpublished material

Title: 1998 Grays Harbor Approach and Conditions Survey

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: GRAYS98

Source_Contribution: Included in merged 1926/1998 data sets

Process_Step:

Process_Description:

Converted from WASP 4602 feet to WASP 5626 meters and merged into data set. See Gibbs and others, 2000 for additional information

Process_Date: 1999

Source_Information:

Source_Citation:

Citation_Information:

Originator:

US Army Corps of Engineers; Seattle District and Waterways Experiment Station

Publication_Date: Unpublished material

Title: 1998 Willapa Bay Hydrographic Survey

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: WILLAPA98

Source_Contribution: Included in merged 1926/1998 data sets

Process_Step:

Process_Description:

Converted from WASP 4602 feet to WASP 5626 meters and merged into data set. See Gibbs and others, 2000 for additional information

Process_Date: 1999

Source_Information:

Source_Citation:

Citation_Information:

Originator: US Army Corps of Engineers; Portland District

Publication_Date: Unpublished material

Title: 1998 MCR Approach Survey

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: MCR_98_AP

Source_Contribution: Included in merged 1926/1998 data sets

Process_Step:

Process_Description:

Converted from OR SP 5076 feet NAD27, to WASP 5626 meters NAD83 and merged into data set. See Gibbs and others, 2000 for additional information

Process_Date: 1999

Source_Information:

Source_Citation:

Citation_Information:

Originator:

US Army Corps of Engineers; Portland District and US Geological Survey, CMG

Publication_Date: Unpublished material

Title: 1998 MCR Extension survey

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: MCR_98_EX

Source_Contribution: Included in merged 1926/1998 data sets

Process_Step:

Process_Description:

Converted from WASP 4602 feet to WASP 5626 meters and merged into data set. See Gibbs and others, 2000 for additional information

Process_Date: 1999

Source_Information:

Source_Citation:

Citation_Information:

Originator: US Geological Survey, CMG

Publication_Date: Unpublished material

Title: Point coverage SWWA26PTS_SP

Edition: Version 1.0

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1926

Ending_Date: 1927

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: SWWA26PTS_SP

Source_Contribution: Edited NOS hydrographic data points used for gridding.

Process_Step:

Process_Description:

NOS_HSD data projected from Lat/Long NAD27 to WASP South Zone 5626, and edited of erroneous points. See Gibbs and others, 2000 for additional information

Process_Date: 1999

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Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 324

Column_Count: 117

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Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: State Plane Coordinate System 1983

State_Plane_Coordinate_System:

SPCS_Zone_Identifier: 5626

Lambert_Conformal_Conic:

Standard_Parallel: 45.833333

Longitude_of_Central_Meridian: -120.5

Latitude_of_Projection_Origin: 45.333333

False_Easting: 500000

False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 500

Ordinate_Resolution: 500

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378206.4

Denominator_of_Flattening_Ratio: 294.98

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: Mean lower low water

Depth_Resolution: 1.0

Depth_Distance_Units: meters

Depth_Encoding_Method:

Explicit depth coordinate included with horizontal coordinates

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Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

United States Geological Survey (USGS), Coastal and Marine Geology (CMG)

Contact_Person: Ann E. Gibbs

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing 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) 329-5060

Contact_Facsimile_Telephone: (650) 329-5190

Contact_Electronic_Mail_Address: agibbs@usgs.gov

Distribution_Liability:

Please recognize the US Geological Survey and Southwest Washington Coastal Erosion Study as the source of this information

Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.

The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.

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Metadata_Reference_Information:

Metadata_Date: 20001018

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

United States Geological Survey (USGS), Coastal and Marine Geology (CMG)

Contact_Person: Ann E. Gibbs

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing 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) 329-5060

Contact_Facsimile_Telephone: (650) 329-5190

Contact_Electronic_Mail_Address: agibbs@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

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Generated by mp version 2.6.0 on Thu Dec 28 12:43:08 2000