Non-GPS navigation with Google Cartographer SLAM & ArduPilot Rover HD

First test of ROS/Google Cartographer SLAM and ArduPilot Rover. Rover is an AION Robotics R1 with a Cube (aka Pixhawk2) autopilot running ArduPilot Rover-3.5-dev. ROS/Google Cartographer runs on an onboard NVidia TX2 is makes use of an RPLidar A2 360 Lidar. Wiki with setup instructions: http://ardupilot.org/dev/docs/ros-cartographer-slam.html