Surveyor's Wheel is awesome innovation for measuring long distance, In a Surveyor's Wheel distance is measured using rotating a wheel on the road, but older kits are mechanical so they are not easy to operate.
in our project we modified the Surveyor's Wheel into digital system. In this system a micro-controller is used as controller unit which is connected to LCD and rotary encoder. when wheel is rotated on road by hand, rotary encoder sends the pulses to micro-controller, the pulses are counted by microcontroller. Traveled distance is directly proportional to number of pulses
Stick (for Wheel attachment)
Some Other Components
1. AVR Dude
2. AVR Studio
Distance Measurement Using Hand Wheel (Digital Surveyor's Wheel)