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

Data Format and Projection

All vector data are delivered as Esri shapefiles in the geographic coordinate system (WGS 84). The raster data are Esri binary grid format or GeoTiff in Universal Transverse Mercator projection, Zone 19N, WGS 84 datum. All spatial data are distributed with Federal Geographic Data Committee (FGDC) compliant metadata in text, FGDC Classic hypertext markup language (HTML), and FAQ HTML formats.

Data Access

The datasets from this project can be accessed in the following ways:

1. With ArcGIS 9.3 or later, all shapefile and raster data may be viewed and manipulated, although the Spatial Analyst extension will be required to fully examine and work with the Esri grids. Copy the GIS_catalog folder or download the GIS_catalog.zip file (431 megabytes) to a computer and open the ArcMap document 2014-1220.mxd. This map document has all the data layers loaded in the table of contents and uses relative links.
2. 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 software. Once ArcReader is installed, all the data can be viewed by opening the published map file (PMF) named 2014-1220.pmf, which was created in ArcMap version 9.3.1.

Data Organization

The data are organized in folders on the Publications Warehouse Web site. The file structure is described below. Data layers can be downloaded individually from the table below or collectively from the GIS_catalog.zip file (431 megabytes).

GIS_catalog

2014-1220.mxd—ArcMap™ 9.3 map document containing selected data layers described below.

2014-1220.pmf— Esri ArcReader (created with Esri ArcGIS Publisher 9.3.1) map document for use with free ArcReader software. Download ArcReader at http://www.esri.com/software/arcgis/arcreader/download.html.

Basemap

OUTLINE25K_POLY_dd.shp—Outline of the Commonwealth of Massachusetts (1:25,000)

shdrel5k—Shaded relief for the surface terrain of the Commonwealth of Massachusetts (1:5,000)

PhysiographicZones

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

BuzzardsBay_ShellZones.shp—Physiographic zones polygons where high concentrations of shells are on the seafloor as defined through the interpretation of geophysical, sample, and bottom photograph data.

SedimentTexture

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

SourceData

• bathy
  • bb_navd88_10m - Grid: Bathymetry at 10-m resolution.
• bb_navd88hs_10m.tif - Image: Hillshaded relief image at 10-m resolution.
• BS_composite_1m.tif -Image: Acoustic-backscatter intensity mosaic at 1-m resolution.

Stratigraphy

• DredgeSpoil
  • dredgespoil - Grid: Thickness of dredge spoil deposits 10-m resolution.
• QfeQmn
  • qfeqmniso- Grid: Thickness of Qfe/Qmn stratigraphic unit at 40-m resolution.
• U_r
  • Urelev- Grid: Elevation of U_r/U_t surface at 40-m resolution.
  • urelevhs.tif—Image: Hillshaded relief image of the U_r ravinement surface at 40-m resolution.

SurficialGeology

• BuzzardsBay_surfgeol.shp – Shapefile: Surficial geology as defined through the interpretation of seismic profiles.

Data Preview

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

Basemap

Filename Description View Metadata Download OUTLINE25K_POLY_dd.shp Polygon shapefile (geographic) outline of the Commonwealth of Massachusetts (1:25,000) HTML FAQ TEXT OUTLINE25K_POLY_dd.zip 2.3 MB shdrel5k MrSID image (State Plane Coordinate System 1983) of shaded relief for the surface terrain of the Commonwealth of Massachusetts (1:5,000) HTML FAQ TXT shdrel5k.zip 64.0 MB

Physiographic Zones

Filename Description View Metadata Download BuzzardsBay_Pzones.shp Polygon shapefile (geographic) of physiographic zones of Buzzards Bay HTML FAQ TEXT BuzzardsBay_Pzones.zip 1.9 MB BuzzardsBay_ShellZones.shp Polylgon shapefile (geographic) of high concentrations of shells are on the seafloor of Buzzards Bay HTML FAQ TXT BuzzardsBay_ShellZones.zip 0.76 MB

Sediment Texture

Filename Description View Metadata Download BuzzardsBay_sedcover.shp Polygon shapefile (geographic) of sediment texture polygons of Buzzards Bay HTML FAQ TEXT BuzzardsBay_sedcover.zip 1.9 MB

Source Data

Filename Description View Metadata Download bb_navd88_10m Esri binary grid of the bathymetry of Buzzards Bay at 10-m resolution (UTM Zone 19N) HTML FAQ TEXT bb_navd88_10m.zip 22.8 MB bb_navd88hs_10m.tif Gray-scale GeoTIFF image of the hillshaded relief of Buzzards Bay at 10-m resolution (UTM Zone 19N) HTML FAQ TXT bb_navd88hs_10m.zip 2.2 MB BS_composite_1m.tif Gray-scale GeoTIFF image of acoustic-backscatter intensity of Buzzards Bay at 1-m resolution (UTM Zone 19N) HTML FAQ TEXT BS_composite_1m.zip 710.0 MB

Stratigraphy

Filename Description View Metadata Download DredgeSpoil Esri binary grid of the thickness of dredge spoil deposits of Buzzards Bay at 10-m resolution (UTM Zone 19N) HTML FAQ TEXT DredgeSpoil.zip 0.15 MB Qfe_Qmn Esri binary grid of the thickness of Qfe/Qmn unit of Buzzards Bay at 40-m resolution (UTM Zone 19N) HTML FAQ TEXT Qfe_Qmn.zip 0.8 MB Urelev Esri binary grid of the elevation of Ur/Ut surface of Buzzards Bay at 40-m resolution (UTM Zone 19N) HTML FAQ TEXT Urelev.zip 1 MB Urelevhs.tif Gray-scale GeoTIFF image hillshaded relief image of the Ur ravinement surface of Buzzards Bay at 40-m resolution (UTM Zone 19N) HTML FAQ TEXT Urelevhs.zip 0.2 MB

Surficial Geology

Filename Description View Metadata Download BuzzardsBay_surfgeol.shp Polygon shapefile (geographic) of the surficial geology of Buzzards Bay HTML FAQ TEXT BuzzardsBay_surfgeol.zip 0.9 MB