USGS Cruise DIAN 97011 Long Island, NY Inner Shelf -- Fire Island Boomer and Sparker Field Navigation Data and Shotpoint Maps


Click on one of the five survey areas for a more detailed map and to access the seismic image files.

navigation map

Area 1 (Lines 47-55, 73) | Area 2 (Lines 1-16, 74-76) | Area 3 (Lines 17-46, 77-80)
Area 4 (Lines 56-72, 81-84) | Area 5 (Lines 85-100)


Shotpoint Navigation Data:

The navigation is stored in ASCII files using eight fields separated by commas.
  • Field 1: Longitude
  • Field 2: Latitude
  • Field 3: Line Number
  • Field 4: Shot Number
  • Field 5: UTM Zone 18 Easting
  • Field 6: UTM Zone 18 Northing
  • Field 7: Year
  • Field 8: Julian Day:Hr:Min:Sec
Shotpoint Navigation Files (ASCII):

Area 1 | Area 2 | Area 3 | Area 4 | Area 5

Shotpoint Maps:


Full Extent | Area 1 | Area 2 | Area 3 | Area 4 | Area 5

Raw Navigation Data:

The raw navigation was collected  using a differential GPS system (Ashtech). These files represent the raw data recorded on floppy disk aboard ship. The data are in NEMA format. WARNING: These data have not been checked for errors. Use with caution.

To aid viewing of the original raw navigation data, each data entry was reformatted (removing the NEMA codes) by filtering the raw data files through a UNIX awk script.. Every navigation fix from the original data has been preserved however.

The navigation is stored in ASCII files using six fields separated by tabs, with each file representing a separate julian day (i.e. jd129web.txt). Navigation fixes are at 10 second intervals. The start and end of each line is marked within each reformatted navigation file.
Download Files (click on the Julian Day):
Julian Day: 129 | 130 | 131 | 133 | 134 | 135 | 137 | 138 | 139 | 140 | 141 | 142 | 143


area5 area4 area3 area2 area1 area5 area4 area3 area2 area1