SWWA98_500UTM: Southwest Washington, 500 meter, 1926/1998 Bathymetry Grid, UTM Projection

SWWA98_500UTM 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 UTM Zone 10.
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.