Appendix 1. Geospatial Data

This section describes the qualitatively derived data interpretation files, the location of the files, and how to access the data.

Data Format and Projection

Vector data are delivered as Esri shapefiles in the Geographic Coordinate System, referenced to the World Geodetic System of 1984 (WGS 84). Raster data from Pendleton and others (2013) are in the Universal Transverse Mercator Horizontal Coordinate System referenced to WGS 84, and the elevation data are relative to the North American Vertical Datum of 1988.  Spatial data are distributed with Federal Geographic Data Committee (FGDC)-compliant metadata in text and FGDC Classic and FAQ (in hypertext markup language [HTML]) formats. Esri ArcCatalog can also be used to examine the metadata available in the Esri extensible markup language (XML) format associated with each geographic information system (GIS) data file.

Data Access

The datasets from this report can be accessed in the following ways, depending on available software:

• With ArcGIS software, shapefile data may be viewed and manipulated.
• Without any GIS software, view the data through ArcReader, a free mapping application distributed by Esri for Windows, Linux, and Unix operating systems. Download ArcReader from the Esri Web site (http://www.Esri.com/software/arcgis/arcreader/download.html) and follow the directions for downloading and installing the free software.

Data Organization

The data from this report are organized in folders. Links to source data published by Pendleton and others (2013) are included in the table below to provide easy access to related layers.

GIS_catalog

PhysiographicZones

NAH_CCB_Pzones.shp—Shapefile: physiographic zones polygons defined through the interpretation of geophysical and sample data.

SedimentTexture

NAH_CCB_sedcover.shp—Shapefile: sediment texture polygons defined through the interpretation of geophysical and sample data.

Data Preview

To download vector data, right click on the link within the ”transfer file” column in the table below. “Save Target As...” to save a compressed ZIP file to the local hard drive.

File description	File name (metadata link)	Preview	File format	Transfer file	File transfer size
Physiographic Zones
Physiographic zones (Geographic)	NAH_NH_Pzones		Esri shapefile (polygons)	PhysioZones.zip	1 MB
Sediment Texture
Sediment texture (Geographic)	NAH_NH_sedcover		Esri shapefile (polygons)	SedCover.zip	1 MB
Source data from Pendleton and others (2013)
NAVD 88 bathymetry and topography grid (30-m cell size; UTM Zone 19N)	navd_bath_30m		Esri grid, 32 bit floating point	bathy_30m.zip	30.3 MB
Bathymetry and topography hillshade image (30-m cell size; UTM Zone 19N)	NAVD88_HS_30m.tif		GeoTIFF	HS_30m.zip	7.0 MB
Backscatter mosaic (10-m cell size; UTM Zone 19N)	BScomposite_10m.tif		GeoTIFF	BS_10m.zip	43.7 MB