• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • Bus Plotter IV: Extrapolate From Stop Predictions

    September 26th, 2010
    mbta, mbtaplot, programming, python, tech, transport  [html]
    I've made the plotter now take advantage of the "predictions" command offered by the webservice that tells you how many minutes it will be before a specific bus arrives at a given stop. Instead of doing linear extrapolation from the previous two reported positions it uses the previous position and an upcoming stop. I first tried using the next stop to do predictions, but because the webservice only provides data at the minute level, this was much too inaccurate and I switched to using a threshold of two minutes out. There might be multiple stops two minutes out, so we break ties by taking the closest one to the last known bus location.

    See it in action: mbtaplot

    Recent posts on blogs I like:

    What I've been doing instead of writing

    I’ve been too busy with work to write much recently, but in lieu of that, here’s a batch of links to other stuff I’ve been doing elsewhere. The thing I’m most excited about: Wave raises $200m from Sequoia, Stripe, Founders Fund and Ribbit at a $1.7b valuati…

    via benkuhn.net September 11, 2021

    Some reasons to measure

    A question I get asked with some frequency is: why bother measuring X, why not build something instead? More bluntly, in a recent conversation with a newsletter author, his comment on some future measurement projects I wanted to do (in the same vein as ot…

    via Posts on Dan Luu August 27, 2021

    Songs about terrible relationships

    [Spoilers for several old musicals.] TV Tropes lists dozens of examples of the “I want” song (where the hero of a musical sings about their dream of escaping their small surroundings). After watching a bunch of musicals on maternity leave, I’m wondering h…

    via The whole sky July 17, 2021

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact