OCNMS Vector Bathymetry
A zipped extent shapefile may be obtained here (if you have difficulty, try right click and ‘save target as…’)
Projection: NAD_1983_HARN_StatePlane_Washington_South_FIPS_4602, Units Foot_US
Data is directly downloadable at the following locations:
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bathymetry contours |
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bathymetry contours |
Physical Description
These data vector line data in ESRI Interchage (*.e00) format.
Projection: WGS_1984_UTM_Zone_10N, Units Meters
Vertical Datum: Unspecified, Units Meters, Vertical resolution is 10 meters.
Horizontal Accuracy:
All horizontal control to support hydrography must meet or exceed third-order, class I standards as described in the Federal Geodetic Control Committee booklets, Standards & Specifications for Geodetic Control Networks (FGCC 1984). These standards list the minimum relative accuracy permitted for each order of accuracy.
Vertical Accuracy:
National Ocean Service standards for the accuracy of measured depths in hydrographic surveys are derived from standards specified by the International Hydrographic Organization (IHO) in the International Hydrographic Bureau (1987) Special Publication No44, "IHO Standards for Hydrographic Surveys". Essentially, with a probablility of 90%, the total error in a measured depth should not exceed 0.3 m from 0 to 30 meters, and 1% of depths greater than 30 m.
Other Useful Information
These data will need to be imported using Import71.exe or import tool specific to your GIS software.
This page contains content copied from OCNMS’s Data Catalog. Please see their webpage for comprehensive information on OCNMS SoNAR data and data products
Also, see their Benthic Mapping webpage. Overviews of side scan sonar and multibeam sonar are available as well as a comprehensive overview of their benthic mapping program.
A comprehensive citable report pertaining to this specific survey is can be downloaded here in *.pdf format.
Questions? Commemts?
Contact Keven Bennett kbenet@u.washington.edu