PNG images of each seismic profile were generated in order to incorporate images of the seismic profiles into Geographic Information System (GIS) projects and data archives utilizing HTML. The PNG images represent approximately 3800 km of EdgeTech SB-512i chirp seismic-reflection profiles collected within Vineyard Sound. Each profile image is hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile 'VS_SeismicTrackline.shp'. Even 500 shot index markers along the top of the PNG images correlate to the positions of 500 shot intervals within the Esri point shapefile 'VS_SeismicShot_500.shp'.
Are there legal restrictions on access or use of the data?
Use_Constraints:Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the source of this information.
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
|Data format:||Zip (WinZip version 9.0) compressed PNG images and associated metadata for processed EdgeTech SB-512i chirp seismic-reflection profiles collected by the U.S. Geological Survey offshore of Massachusetts within Vineyard Sound. To get the complete dataset, three separate files need to be downloaded. The images from 2009-002-FA are in a zip file that is 168 MB, 2010-004-FA images are in a zip file that is 729 MB, and 2011-004-FA images are in a zip file that is 324 MB. in format PNG (version Information unavailable from original metadata.) Portable Network Graphics (PNG)|
|Media you can order:||DVD-ROM (Density 4.75 Gbytes) (format UDF)|
Digital copies of these chirp seismic data may also be obtained in the SEG-Y Rev. 1 standard format upon request. The data would be packaged on DVD, and contain the chirp-processed, envelope traces.
These data can be viewed with any PNG image viewing software.