Chirp Seismic-Reflection Data From the Baltimore, Washington, and Norfolk Canyons, U.S. Mid-Atlantic Margin

Data Catalog

Data Access

The spatial data in this report are delivered in vector and raster format. Vector data can be viewed within an ArcMap 9.3.1 map document. Refer to the “Data Description” section below for details on file descriptions and locations.

Projection

Data Download

All the data are stored and compressed within ZIP files in order to facilitate web downloads. ZIP files of the individual data layers are linked within the “Data preview” section. See “Data Preview” for specific download instructions. Vector data are stored as shapefiles within the ZIP file. Users will need to have a program capable of uncompressing a ZIP archive file. Several free programs can be downloaded to do this.

Data Description

This section describes the location of data within the folder storage structure of the Web page. Vector data are delivered as Esri shapefiles. Seismic-reflection profiles are in PNG image format. Navigation data are in the original ASCII HYPACK files. The survey log is delivered as a Microsoft Excel 2010 spreadsheet. The scripts used to process the seismic data are also provided.

data
This folder contains full_data_extent.mxd—ArcMap 9.3 (created in ArcMap 10.1, saved as a version 9.3 document) map document containing the GIS data layers. This file can be used to view the data as long as the following directory structure is maintained.

Subfolders include:

Baltimore_Canyon

GIS
BC_shotnav - Contains the shapefile of the shot point at 100-shot interval as well as the comma-separated values (CSV) of all the unique shot navigation for Baltimore Canyon.
BC_tracklines—Shapefile: seismic tracklines for Baltimore Canyon.

images
This folder contains PNG images of Baltimore Canyon seismic-reflection profiles.

Washington_Canyon

GIS
WC_all100shot—Contains the shapefile of the shot points at 100-shot interval as well as the comma-separated values (CSV) of all unique shot navigation for Washington Canyon.
WC_tracklines—Shapefile: seismic tracklines for Washington Canyon.

images
This folder contains PNG images of Washington Canyon seismic-reflection profiles.

Norfolk_Canyon

GIS
NC_all100shot—Contains the shapefile of the shot points at 100-shot interval as well as the comma-separated values (CSV) of all unique shot navigation for Norfolk Canyon.
NC_tracklines—Shapefile: seismic tracklines for Norfolk Canyon.

images
This folder contains PNG images of Norfolk Canyon seismic-reflection profiles.

Data Preview

To download raster and vector data, right click on the link within the “Download ZIP 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)	View	File format	Download zip file
Primary Data for Baltimore Canyon
Baltimore Canyon tracklines	BC_tracklines		Esri shapefile polylines	BC_tracklines.zip (393 KB)
Baltimore Canyon seismic-reflection profiles	BC_all100shot		Esri shapefile points	BC_shotnav.zip (729 KB) Also contains the CSV text file of all the shot point navigation.
Baltimore Canyon seismic-reflection profiles	BC_seisimages		PNG	BC_seisimages.zip (142 MB)
Primary Data for Washington Canyon
Washington Canyon tracklines	WC_tracklines		Esri shapefile polylines	WC_tracklines.zip (626 KB)
Washington Canyon seismic shotpoints at 100-shot interval	WC_all100shot		Esri shapefile points	WC_shotnav.zip (249 KB) Also contains the CSV text file of all the shot point navigation.
Washington Canyon seismic-reflection profiles	WC_seisimages		PNG	WC_seisimages.zip (78.7 MB)
Primary Data for Norfolk Canyon
Norfolk Canyon tracklines	NC_tracklines		Esri shapefile polylines	NC_tracklines.zip (741 KB)
Norfolk Canyon seismic shotpoints at 100-shot interval	NC_100shot		Esri shapefile points	NC_shotnav.zip (1.33 MB) Also contains the CSV text file of all the shot point navigation.
Norfolk Canyon seismic-reflection profiles	NC_seisimages		PNG	NC_seisimages.zip (179 MB)
Ancillary data
HYPACK navigation	HYPACK_2012-005-FA	HYPACK_2012-005-FA.zip (45 MB)
Scripts used to process seismic-reflection data	Individual scripts contain comments for usage instructions.	scripts.zip (7 KB)
Survey log maintained during cruise	2012-005-FA_Survey log	Microsoft Excel 2010 surveylog_2012-005-FA.zip (54KB)