d3.js and Google Maps API in 11 easy steps
Bryony Miles

i tweaked the code a little bit to get live lat and long from an api, by this i could get live tracking of my car!
but now i want just only the live locations to be plotted on the map , and aviod the trailing points, but i dont know how to remove the trailing points.. can someone tell me how? i guess its something related to the overlays.. but dont have a clear idea :(