Position reference systems comprising software, hardware, cameras, lasers, radio-frequency identification (RFID) apparatus, and beacons for use in directing the motion, stopping and loading points for autonomous robotic vehicles, such as those used in warehouses, so that they may navigate around shelving and racking and other objects, collect specific goods from specific shelves or places, load them into a temporary container or storage device and deposit them at a defined point for onward di...