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Mapping: how accurate?

Discussion in 'CycleChat Cafe' started by Fnaar, 25 Mar 2008.

  1. Fnaar

    Fnaar Smutmaster General

    Location:
    Thumberland
    Hi, sorry to post something related to cycling (;)), but just wondering how accurate mapping sites are in terms of ascent and all that palaver? Reason I arks is cos mapmyride gives 1450 ft ascent on a 67 mile route I wanna try out, and another site has pretty much the same route mapped already with 3900 ft... shome dishcrepanshy.... !
     
  2. Cycling Naturalist

    Cycling Naturalist Legendary Member

    Location:
    Llangollen
    If they are designed for southerners, they will exagerate the distance and the ascent, so that three laps of Richmond Park can be claimed to be the equivalent of a mountain stage of the TdF.
     
  3. Maz

    Maz Guru

    but only if you ride over the speed bumps and cobbled paths.
     
  4. Crackle

    Crackle Pah Staff Member

    Location:
    Wirral
    They all vary widely. I found Mapmyride to be nearer than Bikely and another (name forgotten) I tried. I checked Mapmyride spot heights agains a map and it seemed roughly right. On rolling roads with short up and downs it will underestimate though, it's better on longer climbs. I have no idea how accurate any of them are compared to reality though.

    Edit: Here's my post previously http://www.cyclechat.co.uk/forums/showthread.php?t=5711
     
  5. Cycling Naturalist

    Cycling Naturalist Legendary Member

    Location:
    Llangollen
    Incompatible with a claimed average speed of 45.6 mph. ;)
     
  6. pzycoman

    pzycoman New Member

    Location:
    Huffing a kitten
    Your missing a 1 - its 145.6 mph :biggrin:
     
  7. Dave5N

    Dave5N Über Member


    Was that total above sea level or perhaps total up and down?
     
  8. Fnaar

    Fnaar Smutmaster General

    Location:
    Thumberland
    It was total ascent....