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

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ORWA26_500UTM is a digital bathymetric surface grid of the seafloor offthe coast of Washington and Oregon. Grid cell spacing is 500m and theprojection is UTM Zone 10.The surface was produced by gridding National Ocean Service (NOS)Hydrographic Surveys collected between 1926 and 1974 (primarily1926 to 1930). This work includes the most recent bathymetric dataavailable on a regional scale over the inner to outer continental shelfoff the coast of Washington and Oregon. The results represent thebest available estimate of the seafloor morphology for the time periodcirca 1926.
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SWWA26_750UTM is a digital bathymetric surface grid of the seafloor offthe coast of Southwest Washington and Northwest Oregon.Grid cell spacing is 750m and the projection is UTM Zone 10.The surface was produced by gridding National Ocean Service (NOS)Hydrographic Surveys collected between 1926 and 1928. This work includesthe most recent bathymetric data available on a regional scale over theinner to middle continental shelf off the coast of Washington. Theresults represent the best available estimate of the seafloor morphologyfor the time period circa 1926.
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NEST98PTS_UTM is a point coverage containing digital hydrographic datafrom the coast of Southwest Washington and Northwest Oregon, USA. Thehorizontal datum is Universal Transverse Mercator, Zone 10 meters.The data set includes National Ocean Service (NOS) hydrographic surveyscollected between the 1926 and 1928, surveys collected in 1998 by the U.S.Army Corps of Engineers (USACE) around the entrances to Grays Harbor,Willapa Bay, and the Columbia River, and additional data fabricated bythe author in order to generate smooth transitions between the data sets.The user is cautioned, to use this data set with full knowledge ofthe original intent the limitations, and assumptions used to generate it.
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SWWA26PTS_UTM is a point coverage containing digital hydrographic datacollected off the coast of Southwest Washington and Northwest Oregon, USA.The horizontal datum is Universal Transverse Mercator, Zone 10 meters.The data set includes National Ocean Service (NOS) hydrographic surveyscollected between the 1926 and 1928. This data set includes the mostrecent bathymetric data available on a regional scale over the inner tomiddle continental shelf off the coast of Washington and Oregon.
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ORWA26PTS_UTM is a point coverage containing digital hydrographic datacollected off the coast of Washington and Oregon, USA. The horizontaldatum is Universal Transverse Mercator, Zone 10 meters. The data setincludes National Ocean Service (NOS) hydrographic surveys collectedbetween 1926 and 1974 (primarily 1926 to 1930). It includes the mostrecent bathymetric data available on a regional scale over the inner toouter continental shelf off the coast of Washington and Oregon.
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