Line 1 - fixed spread with 35 shots starting 32 meters from the first geophone

Lines 2 and 3 modified rolling spreads where Line 2 rolled southward and Line 3 
rolled northward and the location of the last geophone was at the same point 
(we actually merged the two data sets when processing).

Lines 1 and 2: For Line 1 the first trace was on the *eastern* side of the line.  
First shots are offset to the east.  For Line 2 the first trace was on 
the *north* side of the line. First shots are offset to the north.

The Coordinates should be relative to the first shot location for both Line
 1 and Line 2.

Line 3 was shot to extend line two but started on the southern side of Line
2 and met it in the middle.  More specifically the last geophone on line 3
was located at the last shot of line 2.

Test Line 1:
42.6644N
108.4897W

Test Line2:
42.658492°N
108.474950°W

Test Line 3:
42.655607°N
108.470517°W