Dataset description: Bathymetry GIS data

10 m bathymetric contours for the Southwest Washington Study area based on NOS hydrographic survey data collected between 1926 and 1930 and supplemented with the southern part of the study area altered based on bathymetry collected on the CRLS 97007 cruise. Used as basemap data for surveying.

Version	1
Keywords	sea-floor characteristics, contouring, geospatial datasets, bathymetry
Data types	Single Beam
Format	ESRI shapefile
Amount	2 MB

Contacts

Contact	David C Twichell WHSC_data_contact@usgs.gov

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Location of materials and files

Supporting documentation or data
Public files	https://doi.org/10.3133/ofr00167 https://pubs.usgs.gov/of/2000/of00-167/data/basemap
Digital location	http://pubs.usgs.gov/of/of00-167/
Metadata	https://cmgds.marine.usgs.gov/metadata/whcmsc/open_file_report/ofr2000-167/bathy.shp.xml Outline - Questions and answers - Text - XML

Activities and equipment

Activity	Equipment
1997-007-FA	Echosounder Generic echosounder used to calculate water depth by measuring the time it takes for the acoustic signal to reach the bottom and the echo to return to the transducer. Used when the specific echosounder is either unknown, or more details are given in equipment usage.