13-Survey & Map Mode
Noggin
110
If the Grid Type is set to X Lines only or Y Lines only (
13.3.4.1: p.107
), the length of those lines
are not restricted by the Line Spacing parameter of the opposite dimension. That is why if an X
Lines only grid is selected, the X dimension can be input as a value rather than an increment of
the Y Line Spacing. Similarly, if a Y Lines only grid is selected, the Y dimension can be input as a
value rather than an increment of the X Line Spacing.
13.3.4.3 Line Spacing
For grid data acquisition, the distance between survey lines needs to be specified.
If the grid type is X Lines only (
13.3.4.1: p.107
) then the spacing between the X lines needs to be
input.
If the grid type is Y Lines only (
13.3.4.1: p.107
) then the spacing between the Y lines needs to be
input.
If the grid type is XY Lines (
13.3.4.1: p.107
) then the spacing between the X lines and Y lines
need to be input. The line spacing can be different. The user can toggle between the X line
spacing and Y line spacing fields by pressing the X/Y button.
Note that the maximum number of lines that can be collected in each direction is 100.
The calculation for determining an appropriate line spacing is complex. One has to consider
system frequency, target size and practical considerations. In general, the Noggin 100 should
have a line spacing of 1.0 meters or less, the Noggin 250 should have a line spacing of 0.5
meters or less, the Noggin 500 should have a line spacing of 0.25 meters or less and the Noggin
1000 should have a line spacing of 0.10 meters or less.
However, line spacing should really be determined by target size. In most cases the system
must pass over a target to detect it. Therefore, the line spacing needs to be on the order of the
size of the target or smaller, if practical. This can be adjusted to a larger spacing for larger targets
or targets with a linear extent. As well, these rules may have to be bent for practical purposes
like survey production rates. The fact is that a tighter line spacing takes longer to collect and this
may not be economically possible in all circumstances.
Summary of Contents for Noggin 100
Page 1: ...User s Guide Copyright 2012 Sensors Software Inc 2011 00022 02 Noggin ...
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Page 17: ...Noggin 2 Noggin Components 3 Figure 2 3 Noggin 100 components ...
Page 156: ...Appendix D Instrument Interference Noggin D 2 ...
Page 158: ...Appendix E Safety Around Explosive Devices Noggin E 2 ...
Page 162: ...Noggin G 4 ...
