• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • Transit Service Quality Map

    November 17th, 2010
    mbta, transit  [html]
    After looking at the maps from yesterday showing how long it would take on transit to reach various places given a starting place, I thought it would be nice to make another map that shows the "transit service quality" in an area. Roughly, this would mean "how long does it take me to get places on transit starting from here?" A smart map would know that some places are more desirable as destinations (more people want to go to copley square than west medford square), but I'm treating all points on the map as equally valuable. So on these maps, each point represents the average time it would take to get to anywhere else on the map, calculated using tillberg's maps.

    On the greyscale maps the range is 45min (white) to 117min (black). On the colored map the ranges are:

    • 45-50: red
    • 50-55: orange
    • 55-60: yellow
    • 65-70: lime green
    • 70-80: green
    • 80-90: teal
    • 90-100: light blue
    • 100-117: medium blue

    If you want to do further work with these, the small greyscale one can be thought of as an array of averages of the tillberg maps, scaled to be between 45min and 117min. The other two maps necessarily have distortions from the resizing or the quantizing.

    Recent posts on blogs I like:

    The Gift of It's Your Problem Now

    Recently a security hole in a certain open source Java library resulted in a worldwide emergency kerfuffle as, say, 40% of the possibly hundreds of millions of worldwide deployments of this library needed to be updated in a hurry. (The other 60% also …

    via apenwarr January 1, 2022

    The container throttling problem

    This is an excerpt from an internal document David Mackey and I co-authored in April 2019. The document is excerpted since much of the original doc was about comparing possible approaches to increasing efficency at Twitter, which is mostly information tha…

    via Posts on December 18, 2021

    Experiences in raising children in shared housing

    Sometimes I see posts about people’s hope to raise children in a group housing situation, and it often seems overly optimistic to me. In particular they seem to expect that there will be more shared childcare than I think should be expected. Today I talke…

    via The whole sky October 18, 2021

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact