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U.S. Geological Survey Open-File Report 2012–1103

Sea-Floor Character and Geology Off the Entrance to the Connecticut River, Northeastern Long Island Sound


Geographic Information System Data Catalog

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Geographic Information System

This report contains geographic information system (GIS) data in vector and raster format. The vector data are provided in shapefile format compatible with Esri ArcView and ArcGIS software. These data are in the World Geodetic System of 1984 (WGS84) coordinate system. The raster data are provided in GeoTIFF format and Esri binary grid format. These raster data are provided in the WGS84 coordinate system and a UTM Zone 18 projection on North American Datum of 1983 (NAD83) vertical coordinate system. The WGS84 and NAD83 datums are used to remain consistent with earlier reports. Data layers provided as supplement to this report should not require additional processing to be used in Esri software.

For users who do not have the Esri software or a compatible GIS data browser available on their computer, a free viewer, ArcExplorer, is available from Esri. The key functionality of ArcExplorer is to display spatial data. The user will need to add the selected data layers by using the add data function of ArcExplorer.

Data Description

This report includes links to several data layers (or themes) that can be used to create views of the study area in northeastern Long Island Sound. GeoTIFFs of the bathymetry are provided as color hill-shaded relief images. ArcRaster binary grids of the original multibeam bathymetric data, which have gaps of no data between many of the lines in shallower areas, are included at a 2-m resolution. These data were also gridded to 10 m, interpolated to fill in the gaps, and merged with the 2-m data to provide datasets with a more continuous perspective. The sidescan sonar imagery is provided at 1-m resolution.

Ancillary vector data consist of (1) polygon data layers that provide base maps of the coastline for the Long Island Sound GIS project area, an outline of the survey area, an interpretation of sea-floor sedimentary environments, and an interpretation of sea-floor features; and (2) point data layers of the sediment data and locations of bottom photos. The photographic data are provided in mid- and full-resolution JPEG image format.

Each GIS data layer from this publication is cataloged below for easy access. The individual data layers are described below and include the GeoTIFF, grid, or shapefile name (for example, h12013_2m_utm18.tif), 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.

The root level of this report on the DVD-ROM contains an ArcView project file (h12013.apr) created in ArcView 3.3 and an Esri ArcMap document (h12013.mxd) created in ArcMap 9.2, but saved as an ArcMap 9.0/9.1 document to make it accessible to older versions of the software.

Federal Geographic Data Committee (FGDC) metadata for the individual data layers are provided in HTML, a frequently asked questions (FAQ) HTML, and text versions. Selecting associated metadata files from links in the catalog below will open the information in a new browser window.

A compressed (.zip), downloadable archive file containing the components of the shapefile, grid, or image for each data layer is also provided. Compressed, downloadable files were created using WinZip 8.0 for Microsoft Windows. Users who do not have software capable of uncompressing the archived files may obtain a free version of the software from Pkware, Inc.

BATHYMETRIC IMAGERY

DATA-LAYER NAME AND DESCRIPTION

METADATA

FILES

h12013_int2m_geo -- full-color, hill-shaded, interpolated multibeam bathymetric imagery of NOAA survey H12013 (geographic, WGS84) generated from the merged 2-m and 10-m grids

HTML
FAQ
text

Zip
(17.1 MB)

h12013_int2m_utm18 -- full-color, hill-shaded, interpolated multibeam bathymetric imagery of NOAA survey H12013 (UTM, Zone 18, NAD83) generated from the merged 2-m and 10-m grids

HTML
FAQ
text

Zip
(15.4 MB)

h12013_2m_utm18 -- full-color, hill-shaded multibeam bathymetric imagery of NOAA survey H12013 (UTM, Zone 18, NAD83) generated from the 2-m grid

HTML
FAQ
text

Zip
(14.2 MB)

BATHYMETRIC GRIDS

DATA-LAYER NAME AND DESCRIPTION

METADATA

FILE

h12013_intgeo merged 2-m and interpolated 10-m bathymetric grids of the multibeam bathymetry from NOAA survey H12013 (geographic, WGS84)

HTML
FAQ
text

Zip
(9 MB)

h12013_intutm -- merged 2-m and interpolated 10-m bathymetric grids of the multibeam bathymetry from NOAA survey H12013 (UTM Zone 18, NAD83)

HTML
FAQ
text

Zip
(8 MB)
 

h12013_2mutm -- 2-m bathymetric grid of the multibeam bathymetry from NOAA survey H12013 (UTM Zone 18, NAD83)

HTML
FAQ
text

Zip
(7.7 MB)
 

SIDESCAN SONAR IMAGERY

DATA-LAYER NAME AND DESCRIPTION

METADATA

FILES

h12013_1msss_utm18 sidescan sonar mosaic from NOAA survey H12013 (geographic, WGS84)

HTML
FAQ
text

Zip
(17.2 MB)

VERIFICATION DATA LAYERS

DATA-LAYER NAME AND DESCRIPTION

METADATA

FILES

h12013_seddata -- locations and sediment grain-size analysis data (provided in shapefile, text and Excel (.xls) formats) for samples collected during USGS cruises 2009-059-FA and 2010-010-FA for verification of NOAA survey H12013 (geographic, WGS84)

HTML
FAQ
text

Zip
(82 KB)

h12013_botphotos -- locations of bottom photographs (provided in shapefile, text and Excel (.xls) formats) collected during USGS cruises 2009-059-FA and 2010-010-FA for verification of NOAA survey H12013 (geographic, WGS84)

HTML
FAQ
text

Zip
(120 KB)

h12013_photographs -- bottom photographs in two resolutions collected during USGS cruises 2009-059-FA and 2010-010-FA for verification of NOAA survey H12013 (geographic, WGS84)

HTML
FAQ
text

full-res
Zip
(110.9 MB)

mid-res
Zip
(6.8 MB)

INTERPRETIVE DATA LAYERS

DATA-LAYER NAME AND DESCRIPTION

METADATA

FILE

h12013_sedenv -- interpretation of the sedimentary environments from NOAA survey H12013 (geographic, WGS84)

HTML
FAQ
text

Zip
(150 KB)

h12013_interp -- interpretation of sea-floor features from NOAA survey H12013 (geographic, WGS84)

HTML
FAQ
text

Zip
(154 KB)

BASEMAP DATA

DATA-LAYER NAME AND DESCRIPTION

METADATA

FILE

ct_vicinity_geo -- digital vector shoreline shapefile for the Long Island Sound GIS project area (geographic, WGS84)

HTML
FAQ
text

Zip
(4.7 MB)

h12013outline -- boundary of NOAA survey H11922 (geographic, WGS84)

HTML
FAQ
text

Zip
(58 KB)

NAVIGATION DATA LAYER

DATA-LAYER NAME AND DESCRIPTION

METADATA

FILE

2009_059gpsnav -- all text files of the raw GPS navigation for USGS cruise 2009-059-FA during November 2009 previously published in Poppe and others (2010b)

HTML
FAQ
text

Zip
(2.5 MB)

2010_010gpsnav -- all text files of the raw GPS navigation for USGS cruise 2010-010-FA during April 2010

HTML
FAQ
text

Zip
(2.8 MB)

Also included in the data catalog of this report are the NOAA Descriptive Report (h12013_dr.pdf) and the NOAA Data Acquisition and Processing Report (OPR-B370-TJ-09_DAPR.pdf), which contain detailed descriptions of the data-acquisition and data-processing methods used in this study.


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