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U.S. Geological Survey Open-File Report 2010-1006

Geophysical and Sampling Data from the Inner Continental Shelf: Northern Cape Cod Bay, Massachusetts

Appendix 1 Geospatial Data

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This section describes the data collected for this project, the location of the data, and how to access them.

Data Format and Projection
All vector data are delivered as ESRI shapefiles in the geographic coordinate system (WGS84). The raster data are GeoTIFFs and ESRI Grids in Universal Transverse Mercator, Zone 19, WGS84 projection.

All spatial data are distributed with Federal Geographic Data Committee (FGDC) compliant metadata in Extensible Markup Language (*.xml) format. Metadata are also provided for all spatial data in text (*.txt) and FGDC Classic (*.html) format.  ESRI ArcCatalog 9.x can also be used to examine the metadata in a variety of additional formats.

Data Access
The complete datasets from this project can be accessed in two different ways, depending on available software.

  1. If you have ArcGIS 9.x or ArcView 3.x, all shapefile and grid data may be viewed and manipulated, although Spatial Analyst extension will be required to fully examine and work with the ESRI grids.
  2. If you do not have any GIS software, a free software download is available to view the data.

If you have ArcGIS 9.3 or higher
Copy the following folder GIS/ or download the GIS/OFR2010_1006 WinZip file (440 megabytes) to your computer and open the ArcMap document OFR_2010_1006.mxd. This map document has all the data layers loaded in the table of contents and uses relative links, so there is no need to change any pathways or drive letters, if all folders remain the same under the parent directory (GIS).

*Note: The bottom photographs, seismic images, and raw navigation are not included in this zip file. Download these files separately from the data catalog below and copy the files to the unzipped directory.

If you do not have any GIS Software
View all the data via ArcReader, a free mapping application distributed by ESRI for Windows, Linux, and Unix operating systems. Download ArcReader and install it. Go to the ESRI website at and follow the directions for downloading and installing the free software. Once ArcReader is installed, all the data can be viewed by opening the Published Map File (pmf) at GIS/OFR_2010_1006.pmf.

Data Organization
The data are organized in folders on the DVD and Website. The file structure is the same for both types of media and is described below. Data layers can be downloaded individually using the table below. Individual layers are provided in WinZip files. If WinZip® is not currently installed on the local system, go to WinZip( to download the latest version.

folderGIS –– top-level directory for all spatial data. Copy or download this folder to a local hard drive. Note: the size of the uncompressed version of this directory on the DVD is approximately 4.2 gigabytes (GB), whereas the size of the compressed version is 440 megabytes (MB). The compressed version does not include Hypack navigation, bottom photographs or seismic-profile images in JPEG format that can be downloaded separately (see below).

OFR2010_1006.mxd – ArcGIS 9.3 map document with all data loaded in the table of contents.

OFR2010_1006.pmf – ESRI ArcReader (created with Publisher 9.3) map document for use with free ArcReader software. Download ArcReader at

folderraster – Folder containing all raster data in either ESRI Grid, ASCII grid, or GeoTIFF format. Contains subdirectories: bathy and backscatter.

folderbathy – Contains bathymetry and hillshade grids.

folderbackscatter – Contains the backscatter mosaics in GeoTIFF format.

folderhyperlink_images – Contains seismic profile and bottom photography images in JPEG format. Seismic profile images are hyperlinked to the SeismicTracklines layer in the ArcMap Document table of contents. Bottom photographs are hyperlinked to the BottomPhotos data layer. Use the hyperlink tool in ArcGIS to click on these data layers features and view the linked image.

foldershapefile – Contains the eight feature classes from the geodatabase in shapefile format (geographic coordinate system WGS84).

foldernavigation – Contains raw HYPACK navigation files from surveys 07002 and 08002.

Data Catalog

Vector Data – The vector data are stored and delivered in shapefile format in geographic coordinates. The hyperlinks in the first column below “Layer (metadata)” are linked to the metadata for the shapefile. The link in the "Download" column provides access to a WinZip file, which contains the shapefile.

Layer (metadata)





Bathymetric contours at 5-m intervals

Thumbnail image of bathymetric contours



Backscatter tracklines

Thumbnail of backscatter tracklines



Bathymetric tracklines

Thumbnail image of bathymetric tracklines



Locations of SEABOSS bottom photographs

Thumbnail image of bottom video locations



Tracklines for SEABOSS bottom videos

Thumbnail image of video tracklines



Locations and lab results of sediment samples

Thumbnail image of sample locations

Excel (csv format)


Locations of seismic shotpoints at 500-shot intervals

Thumbnail image of unique seismic shotpoint locations



Tracklines for seismic profiless

Thumbnail image of seismic profile tracklines


Raster Data – The primary coordinate system for the raster data is WGS84 UTM Zone 19. The link in the "Download" column provides access to a WinZip file, which contains the raster data.

Raster Layer (metadata)





5-m gridded bathymetry

Thumbnail image of bathymetry

ESRI 32-bit (60 MB)


5-m gridded bathymetry –gaps filled

Thumbnail image of bathymetric grid

ESRI 32-bit (60 MB)


Bathymetric hillshade

Thumbnail image of depth-colored bathymetry

ESRI 8-bit (8 MB)



Thumbnail of gridded backscatter

GeoTIFF (15 MB)



Thumbnail image of backscatter mosaic

GeoTIFF (250 MB)

Image Data – The link in the "Download" column provides access to a WinZip file, which contains JPEG images.

Hyperlinked Images





Sesmic-reflection profile images in JPEG format

Thumbnail image of a representative seismic reflection profile (170 MB)


Bottom photographs in JPEG format

Thumbnail image of a representative bottom photograph (70 MB)

*Note: These zip files contain downsampled and resized versions of the original JPEG images. Higher resolution images can be downloaded individually from the appropriate directory within the GIS/hyperlink_images/ folder or by obtaining the DVD version of this report.

Navigation Data – The link in the "Download" column provides access to a WinZip file, which contains the navigation files.





Navigation data for USGS surveys 07002 and 08002 in Hypack format (120 MB)

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