Spatial Reference Manual
Page 81 of 158
Version 4.4
04/06/2019
11.8.5
Alignment Configuration
The alignment configuration dialogue is used to set the alignment offsets of the
system installation. It is important to set the values in this dialogue correctly for
accurate results. For most applications only the GNSS antenna offset values need to be
entered and the rest of the values can be left at their factory defaults of zero.
11.8.5.1
Alignment Offset
If Spatial is installed into the vehicle with the X axis pointing forwards and the Z axis
pointing down, then no alignment offset is required and the roll, pitch and heading
offset values can remain at the factory defaults of zero.
If the unit is installed in a different orientation then the roll, pitch and heading offset
must be entered. For example if the unit is installed on its side with the X axis pointing
up and the Z axis pointing forwards and no change to the Y axis, then this would result
in a pitch offset of +90 degrees with roll and heading remaining zero.
If there is a small misalignment due to mechanical mounting error this can be
compensated for by setting the vehicle stationary on a level surface and pressing the
zero current orientation button. Please note that this will only correct for roll and pitch
offsets, the heading offset must be entered manually and saved after using this
function.
All the other offsets will be measured in the realigned body co-ordinate frame (X
positive forward, Z positive down) after being corrected for any alignment offset
entered.
11.8.5.2
GNSS Antenna Offset
The GNSS antenna offset is measured from the centre of the Spatial unit to the centre
Illustration 43: Screenshot of Spatial Manager alignment
configuration dialogue
