Note: The web version of this archive does not contain GIS files. To obtain the complete DVD archive, contact USGS Information at (888) ASK-USGS.
The Environmental Systems Research Institute (ESRI) ArcView map documents and shapefiles used to create the trackline maps on this disc and a README.rtf file that describes the project in detail can be found in the ARC subfolder of the SOFTWARE folder located at the top level of this disc. The map documents were created with ESRI GIS software ArcView 3.2 and 8.1 and are compatible with ArcGIS 8.x (Windows). The shapefiles can also be viewed with ArcView 3.x or public domain software ArcExplorer 2.0 (Windows) and 4.0 (Windows, Mac OSX, Unix, Linux), which can currently be downloaded from the ESRI website at http://www.esri.com/software/arcexplorer/index.html.
SEISMIC UNIX SCRIPTS
Seismic Unix (SU) is a public domain seismic processing software package written and maintained by the Center for Wave Phenomena at the Colorado School of Mines in Golden, Colorado. The current web site for SU is http://www.cwp.mines.edu/cwpcodes/index.html. SU is compatible with both Unix and Linux operating systems. The SU scripts provided on this disc were modified from scripts written by the USGS Seafloor Mapping Group in Woods Hole, Massachusetts, and run on a Linux workstation. These SU scripts are located in the tar file BOOMLL.tar, which can be found in the SU subfolder of the SOFTWARE folder located at the top level of this disc. These scripts are provided as examples only. They may need to be modified to run on another system. They also require the use of shareware programs such as Ghostscript and ImageMagick.
The example SU scripts provided here will allow the user to strip off unique navigation fixes from the SEG-Y headers, along with a fix for every 500 shots, and then produce a filtered and gained GIF image of each profile. These images can then be displayed using a variety of shareware programs, such as ImageMagick (Unix, Linux) or a web browser.
Click here for instructions on HOW TO DOWNLOAD THE SEG-Y DATA FILES.
DUMPSEGY.EXE is a DOS seismic data utility that allows the user to examine components of the SEG-Y data files (Zihlman, 1992): the EBCDIC and binary headers, the individual data trace headers, and the hexadecimal SEG-Y samples composing a data trace, or their actual floating point values. The DUMPSEGY.TXT file is the original open-file report that gives detailed instructions on how to use DUMPSEGY.EXE. The DSGYNEWS.TXT file describes the upgrades to the original program. All of these files are located in the USGS subfolder of the SOFTWARE folder located at the top level of this disc. Please refer to DUMPSEGY.TXT and DSGYNEWS.TXT for further infomation and instruction.
Zihlman, F.N., 1992, DUMPSEGY V1.0: A program to examine the contents of SEG-Y disk-image seismic data: U.S. Geological Survey Open-File Report 92-590, 28 p.