Non-navigational GRIDDED BATHYMETRY DATA Washington— Oregon Coast: 1926–1998
Data release and description of methods

INTRODUCTION

Sixteen digital bathymetric surface models (grids) of the seafloor off the coast of Washington and Oregon were created for wave modeling experiments along the coast of Washington. Surfaces were created for two areas over two time periods. The largest area (covering approximately 46 million km ²) extends along the coast of Oregon and Washington, between Heceta Head OR and Cape Johnson WA, from the shoreline to about 2000-m water depth (hereafter referred to as the ORWA region; Fig. 1). The second area (covering approximately 7 million km ²) extends from Tillamook Head OR to Pt. Grenville WA, from the shore to approximately 700-m water depth. This area corresponds to the study area boundaries of the Southwest Washington Coastal Erosion Study (Kaminsky et al., 1997, Gelfenbaum and Kaminsky, 1998; 1999) and is hereafter referred to as the SWWA region (Fig. 2). Surfaces defined by the ORWA and SWWA regions were created for two time periods; historical (circa 1926), and modern (a combination of c.1926 and 1998 as discussed below). Data are presented in both UTM and Washington State Plane South coordinate systems, at 500-m and 750-m grid cell spacing, in ARC/INFO 7.1 (ESRI), SURFER 6.0 (Golden Software), and ASCII formats. The vertical datum is mean lower low water (MLLW).

This report describes the data sets used and the methodology and techniques applied to create the historical and modern bathymetric surfaces. The data included in this report are intended for scientific research and should not be used for navigational purposes. The use of trade names or products does not imply endorsement by the U.S. Geological Survey.

This work was conducted in conjunction with the Southwest Washington Coastal Erosion Study (SWCES), a cooperative project directed by the U.S. Geological Survey, Coastal and Marine Geology Program and the Washington State Department of Ecology. A description of the study and initial results can be found in Kaminsky et al. (1997) and Gelfenbaum and Kaminsky (1998 and 1999).

Download the text part of this report as a PDF document (3.9 MB)

Data are contained in two folders each of which have subfolders

stateplane:     Data in NAD83 Washington State Plane South
                     (Zone 5626) coordinates

 utm     :       Data in UTM Zone 10 projection

Both folders conain these subfolders:

     grids:       Bathymetric surface grids
                    *.e00  ARC/INFO export files
                    *.asc  ARC/INFO ASCII grids
                    *.grd  SURFER ASCII grids
                    *.dat  ASCII XYZ coordinates
     contours:    1 meter bathymetry contours; ARC/INFO
                        export files only
     coastline    NOS composite shoreline for ORWA and SWWA
                         areas
                    *.e00  ARC/INFO export files
                    *.bln  Surfer blanking file
     pointdata    Hydrographic sounding data
                    *.e00  ARC/INFO point coverages
                    *.dat   ASCII data
     conversions  Conversion programs and useful files
     metadata     FGDC formal metadata
                   *.meta  ASCII text
                    *.faq     faq format
                    *.html     html format

FGDC-compliant metadata for this report

Version history

For questions about the content of this report or to obtain the data, contact Ann Gibbs

Download a free copy of the latest version of Adobe Acrobat Reader