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5.4 Surveying in the mounting plate
Any base surface uploaded into the FiX1 will be located on a specific coordinate system: usually the local site
coordinate system. In order to correctly utilise this base surface to compute volumes from FiX1 data, the FiX1 must
be georeferenced on this same coordinate system.
When the mounting plate has been fixed in place, it can be surveyed in by a trained surveyor with a total station.
With the total station referenced to the local site coordinate system, establish the coordinate of the survey reference
point at the centre of the mounting plate. An etched cross clearly indicates the location of this point.
During normal operations, all collected scan data is automatically adjusted to account for the offset from this
coordinate on the mounting plate to the scan origin. The scan origin is at the junction of the horizontal and vertical
axes.
Establish additional coordinates at either end of the reference line. The heading between these two points can be
computed and can be used to help establish the heading of the system as a whole.
Note that for this heading to be meaningful, it must be related to the orientation of the FiX1 on the mounting plate.
The FiX1 can be mounted in one of two positions on the mounting plate, 180° rotated from each other. In Figure
27, note the relative positions of the power connector and Ethernet connector in relation to the direction surveyed.
Currently there is an additional offset of around 74° which must be added to the entered heading. Contact Carlson
for the exact value for your FiX1 unit.
Figure 26 The mounting plate reference line for establishing heading
Summary of Contents for FiX1
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