USGS Geoscience Data Catalog
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Gibbs, Ann E., 20001024, SWWA26PTS_UTM: Historical digital hydrographic and bathymetric data points from the coast of southwest Washington and northwest Oregon: U.S. Geological Survey (USGS), Menlo Park, CA.This is part of the following larger work.
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.: U.S. Geological Survey Open-File Report 00-448.Online Links:
This is a Point data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 21.70924949646
Ordinates (y-coordinates) are specified to the nearest 21.70924949646
Planar coordinates are specified in Meters
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.98.
SWWA26PTS_UTM.PAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 AREA 4 12 F 3
5 PERIMETER 4 12 F 3
9 SWWA26PTS_UTM# 4 5 B -
13 SWWA26PTS_UTM-ID 4 5 B -
17 DEPTH-MLLW 4 9 F 2
21 CARTOCODE 3 3 I -
24 SURVEY 7 7 C -
31 SURVEY-YEAR 4 4 I -
35 X-COORD 4 12 F 3
39 Y-COORD 4 12 F 3
AREA, PERIMETER: value = 0 for point features
SWWA26PTS_UTM#: unique internal control number
SWWA26PTS_UTM-ID: sequence number of all data points
DEPTH-MLLW: surveyed water depth in meters Mean Lower Low Water
CARTOCODE: NGDC Cartographic code; All points in this data = 711
meaning "SOUNDING (Meters and tenths)"
SURVEY: NOS hydrographic survey chart identifier SURVEY-YEAR: Year of survey X-COORD: X (northing) value in meters, UTM Zone 10 Y-COORD: Y (easting) value in meters, UTM Zone 10
This Program is jointly funded by the Washington State Department of Ecology and the US Geological Survey, Coastal & Marine Geology Program.
(650) 329-5060 (voice)
(650) 329-5190 (FAX)
agibbs@usgs.gov
This data set is intended for use as an historical bathymetric data set for scientific research. It is not intended for navigational purposes. The data were originally used 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.
National Geophysical Data Center, 1998, National Ocean Service Hydrographic Survey Data: US Coastal Waters. CD-ROM Set, Version 4.0.: NOAA Data Announcement 98-MGG-03, World Data Center for Marine Geology & Geophysics, Boulder CO.
Ann E. Gibbs and Guy Gelfenbaum, 1999, Bathymetric change off the Washington/Oregon Coast: Coastal Sediments '99 Proceedings of the 4th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes.
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).
Horizontal accuracies for NOS surveys vary by water depth and distance from shore (see Gibbs and Gelfenbaum, 1999).
Vertical accuracies for NOS surveys vary by water depth and distance from shore (see Gibbs and Gelfenbaum, 1999).
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.
Only NOS sounding data with an original cartographic code of 711 are included. The data set was rigorously edited of obviously erroneous points.
Are there legal restrictions on access or use of the data?
- 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.
(650) 329-5060 (voice)
(650) 329-5190 (FAX)
agibbs@usgs.gov
USGS Open-File Report 00-448
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.
| Data format: | Surveyed points with depth and survey identification in format Arc/Info export (version 7.x) Size: 2 megabytes |
|---|---|
| Network links: |
<http://pubs.usgs.gov/of/2000/of00-448/utm/pointdata/swwa26pts_utm.e00.gz> |
(650) 329-5060 (voice)
(650) 329-5190 (FAX)
agibbs@usgs.gov
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://geo-nsdi.er.usgs.gov/metadata/open-file/00-448/swwa26pts_utm.faq.html
Page Contact Information: Peter Schweitzer
Page Last Modified: Monday, 10-Nov-2008 12:18:45 EST