Sensors & Software LMX200 Series, User Manual

Page: 72 / 133

Grid Scan
72
You can press Start to enter a previously collected grid, either to view data or recollect a line.
Figure 7-2: When the button showing the grid number is pressed, this screen allows the user to directly input the grid
they wish to go to
7.1.2 Grid Size
Press the + and - buttons under Grid Size at the bottom of the screen to change the dimensions
of the grid. Alternatively, you can press the + and - buttons on the screen beside Grid Size on
the upper part of the screen.
In metric units, the available grid sizes are 5m x 5m, 10m x 10m and 15m x 15m.
In US standard units, the available grid sizes are 10ft x 10ft, 20ft x 20ft and 50ft x 50ft
7.1.3 Grid Resolution
Grid resolution determines the spacing between grid lines. This can be varied by pressing the +
and - buttons under Grid Resolution at the bottom of the screen. Alternatively, you can press
the + and - buttons on the screen beside Grid Resolution on the upper part of the screen.
Available options are 0.25m, 0.5m and 1.0m in metric units and 1, 2 & 5 feet in US standard
units. The best images will result when the smallest resolution value is used.
Calculating Resolution
The size of target will determine line spacing. The system must pass over a target to detect it;
line spacing needs to be on the order of the size of the target or smaller when practical. This
can be adjusted to a larger spacing for larger targets or targets that are linear. As well, these
rules may have to be bent for practical purposes such as survey production rates. Tighter line
spacing takes longer to collect and may not be economically possible in all circumstances.
Note that the system will not allow you to select a 10'x10' grid with a low resolution of 5', as this
resulting image will be very poor due to inadequate data collected.