Navigation Data

EDITED SHOTPOINT NAVIGATION

Shotpoint navigation files were extracted from the SEG-Y seismic trace headers using Seismic Unix software. They were then processed using PROJ.4 (Unix/Linux shareware currently located at http://www.remotesensing.org/proj) to convert the latitude and longitude coordinates to UTM coordinates.

The edited navigation files can be accessed through the links provided below. The files can also be found within the EDITNAV subfolders of the BOOMER and CHIRP subfolders of the NAV folder located at the top level of this DVD. The data is stored as flat ASCII text files with a .txt extension. 500-shot interval files have also been included. These files are also stored as flat ASCII text files and with a .txt extension. They can be accessed through the links provided below or from within the SHOTNAV subfolders of the BOOMER and CHIRP subfolders of the NAV folder. Boomer navigation has been divided into two files, one for line 01b001 and another for lines 01b002 - 01b015. The shotpoint navigation files and 500-shot interval files both contain eight fields separated by commas. With the exception of boomer line 01b001, whose UTM and latitude/longitude field positions are interchanged, each of these fields is defined as follows:

Field 1: UTM Zone 15 X
Field 2: UTM Zone 15 Y
Field 3: Trackline Number
Field 4: Shotpoint Number
Field 5: Longitude (decimal degrees)
Field 6: Latitude (decimal degrees)
Field 7: Year
Field 8: Julian Day:Hour:Minute:Second (GMT)

EDITED SHOTPOINT NAVIGATION: Boomer (line 01b001) Boomer (lines 01b002 - 01b015) Chirp (all lines)
500-SHOT INTERVAL NAVIGATION: Boomer (line 01b001) Boomer (lines 01b002 - 01b015) Chirp (all lines)

SEISMIC SHOTPOINT MAPS

The edited shotpoint navigation files and 500-shot interval files were used to generate shotpoint maps with ESRI's GIS software ArcView 3.2. The maps were then exported to Adobe Illustrator for final editing and conversion to JPEG images. These JPEG images can be found within the BOOMER and CHIRP subfolders of the MAPS folder located at the top level of this DVD. The Arc project and associated shapefiles used in the creation of the maps can be found within the ARC subfolder of the SOFTWARE folder located at the top level of this DVD. They can be viewed using ESRI's ArcView and ArcGIS software or ArcExplorer shareware, currently located at http://www.esri.com/software/arcexplorer.

Click on the following links to see the seismic shotpoint maps and to access the seismic image files:

BOOMER FULL SURVEY AREA MAP

CHIRP FULL SURVEY AREA MAP