ROS SLAM does not really cater for non-Gaussian. So what is the best way to be vanilla, but strawberry and blueberry too? See Wiki for ROS here - https://github.com/JuliaRobotics/Caesar.jl/wiki/ROS-PoC Also related, - #227 - Return types: JuliaRobotics/DistributedFactorGraphs.jl#134 - PPE: JuliaRobotics/DistributedFactorGraphs.jl#149