Skip past header information
USGS logo with link to USGS Home Page

USGS Open-File Report 2005-1162, Sidescan-Sonar Imagery and Surficial Geologic Interpretation of the Sea Floor off Bridgeport, Connecticut


GIS Data Catalog

Skip past  contents

This report contains several data layers (or themes) to create a geographic planar view of the Long Island Sound region. Data layers have geographic coordinates to allow the data to be integrated into a Geographic Information System (GIS). A GIS is defined as a system of hardware and software to support the display, manipulation, and analysis of spatial data for mapping and complex data solving. This integrated package provides researchers the ability to integrate, analyze and map the various data sets to help with economic and social policy-making decisions regarding the environment.

This project has used the Environmental Systems Research Institute's (ESRI) ArcView and ArcGIS software as its Geographic Information System (GIS) mapping tool. Data layers archived here should not require additional processing to be utilized within the ESRI software. A user may wish to do additional processing, especially if utilizing a different GIS software package or spheroid, but additional processing is not necessary to utilize the data in its archive format.

The vector data consist of a polygon data layer, nos80k, that provides the coastline for the Long Island Sound GIS project area.

For those who don't have the ESRI software or a compatible GIS data browser available, a free viewer, ArcExplorer, is available from ESRI here. Please note that the ArcExplorer software is limited to the Microsoft Windows operating systems. The key functionality of ArcExplorer is the viewing of spatial data. The user will need to add the selected data layers by using ArcExplorer's add data button.

Each GIS data layer from this publication is cataloged below for easy access. The individual data layers are described below and include the shapefile name (for example, Texture) which is linked to a browse graphic showing the data layer extent and coverage. Selecting the data layer name will result in the browse graphic being displayed in a separate browser window.

Federal Geographic Data Committee (FGDC) metadata for the individual data layers is provided in three versions (HTML, FAQ, text). Selecting associated metadata files from the table below will open the information in a new browser window. A 'zip' compressed, downloadable archive file containing the components of the ArcView shapefile for each data layer is also provided. Compressed downloadable files were created using the Windows program WINZIP v8.0. For those users who do not have software capable of uncompressing the archived zip files, they may obtain a free version of the software from Winzip Computing, Inc. or Pkware, Inc.



Sidescan-Sonar Imagery

Directory: data/sidescan
Data Layer Name and Description Metadata Files
h11045_geo1m_wgs84_en - Enhanced and inverted sidescan-sonar mosaic of NOAA survey H11045 off Bridgeport, Connecticut (geographic) HTML
FAQ
txt
zip
h11045_geo1m_wgs84_inv - Inverted composite sidescan-sonar mosaic of NOAA survey H11045 off Bridgeport, Connecticut (geographic) HTML
FAQ
txt
zip
h11045_1m_utm18_wgs84 - converted to 8 bit grayscale, composite sidescan-sonar mosaic produced by NOAA of survey H11045 off Bridgeport, Connecticut (UTM zone 18, WGS84 spheroid) HTML
FAQ
txt
zip
h11045_1m - 24 bit grayscale, composite sidescan-sonar mosaic produced by NOAA of survey H11045 off Bridgeport, Connecticut (UTM zone 18, WGS84 spheroid) HTML
FAQ
txt
zip


Sidescan-Sonar Interpretation

Directory: data/interpretation
Data Layer Name and Description Metadata Files
mosaicinterpret - geologic interpretation of the sidescan-sonar mosaic of NOAA survey H11045 off Bridgeport, Connecticut HTML
FAQ
txt
zip
sedenviron - interpretation of the distribution of sedimentary environments of the sidescan-sonar mosaic of NOAA survey H11045 off Bridgeport, Connecticut HTML
FAQ
txt
zip
texture - surficial sediment distribution interpretation of the sidescan-sonar mosaic of NOAA survey H11045 off Bridgeport, Connecticut HTML
FAQ
txt
zip


Basemap Data

Directory: data/basemaps
Data Layer Name and Description Metadata Files
h11045_outline - Outline of the sidescan-sonar mosaic completed during NOAA survey H11045 HTML
FAQ
txt
zip
nos80k - Medium Resolution Digital Vector U.S. shoreline shapefile for the Long Island Sound GIS project area HTML
FAQ
txt
zip

Skip past footer information

U.S. Department of Interior
> U.S. Geological Survey > Coastal and Marine Geology Program > Woods Hole Science Center

Disclaimer and Accessibility