User's Manual

12-Survey & Map Mode Noggin
98
Y Lines Only - Forward
Set up a first-quadrant XY grid. Data lines run in the Y direction, distance increasing from the X
axis baseline. Line numbers increase in the positive X direction (see Figure 12-12). Lines must
be equally spaced. It is not critical that all the lines are the same length. However, it does make
processing easier if all the lines start at the same baseline position (usually defined as zero
(0.0)).
Figure: 12-12 Proper Y Line surveying pattern. Following this pattern and starting each line from the
same baseline minimizes the data editing required to produce a spatially accurate map of GPR data.
XY Lines - Forward
Set up a first-quadrant XY grid. X data lines run in the X direction, distance increasing from the Y
axis baseline. Line numbers increase in the positive Y direction (see Figure 12-13). Lines must
be equally spaced. Y data lines run in the Y direction, distance increasing from the X axis
baseline. Line numbers increase in the positive X direction. Lines should be equally spaced.
The line spacing of the X lines and Y lines can be different.
It is not critical that all the lines are the same lengths. However, it does make processing easier
if all the lines start at the same baseline position (usually defined as zero (0.0)).
Figure: 12-13 Proper XY grid surveying pattern. Following this pattern and starting each line from the
same baseline minimizes the data editing required to produce a spatially accurate map of GPR data.