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Data Series 100

Navigation Data and Maps

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Seismic Trackline Maps

Trackline maps were generated with ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved in JPEG format. These JPEG images can be found in the MAPS folder. For details about the GIS project included on this disc, refer to the Software page.

Click on the links below to view the trackline maps. Refer to Table 2 for a list of which lines appear on each map.

Full Survey Area Map


Edited Shotpoint Navigation

ASCII navigation files were extracted from the trace headers using Triton Elics Delph Seismic software, and 500-shot-interval location files were extracted using Seismic Unix software. These files were edited to remove or correct spurious data points and fix incorrectly recorded dates. The data were then processed using PROJ.4 software (http://www.remotesensing.org/proj) to generate Zone 17 UTMs from latitude and longitude and reformat the data for use with ESRI ArcView GIS software.

Edited shotpoint navigation files and 500-shot-interval location files can be accessed through the links provided below or from within the NAV folder. Edited shotpoint navigation files are located in the EDITNAV folder, and edited 500-shot-interval location files are located in the SHOTNAV folder. These files are stored by field activity ID with a .txt extension. Both edited versions contain eight fields separated by commas and defined as follows:

Field 1: UTM Zone 17 X
Field 2: UTM Zone 17 Y
Field 3: Trackline Number
Field 4: Shotpoint Number
Field 5: Longitude (decimal degrees)
Field 6: Latitude (decimal degrees)
Field 7: Year
Field 8: Day of Year:Hour:Minute:Second (GMT)

Edited Shotpoint Navigation

500-Shot Interval Location Navigation

NOTE: The navigation data have not been corrected to reflect the unknown offset between the shotpoint and GPS antenna.


Raw Shotpoint Navigation

Unedited navigation data can be found in the RAWNAV folder. The data are stored by field activity ID and trackline name with a .txt extension. Each file contains six fields separated by a space and defined as follows:

Field 1: Trackline Number
Field 2: Shotpoint Number
Field 3: Longitude (decimal degrees)
Field 4: Latitude (decimal degrees)
Field 5: Year
Field 6: Day of Year:Hour:Minute:Second (GMT)

WARNING: These data contain errors and have not been edited.

NOTE: The navigation data have not been corrected to reflect the unknown offset between the shotpoint and GPS antenna.


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