what does it mean , wheel odometry as guess?

[Masoumeh]

hi mattieu,
in this launch file:
https://github.com/introlab/rtabmap_ros/blob/master/launch/demo/demo_husky.launch
you mentioned that if we want to use the following setting, we should consider wheel odometry as guess. what does it mean??
 3DoF mapping with 3D LiDAR and RGB-D camera and ICP odometry (with wheel odometry as guess)

thanks