Find the flattest route between any two points in SF

 (flattensf.com)

45 points | by ishan0102 1 hour ago

7 comments

  • danserfaty 42 minutes ago
    It's not accurate. I mapped it from my house on Cabrillo St in the outer Richmond to 4th avenue and it says I need to climb 25th avenue then walk Geary instead of correctly telling me to use 23rd avenue that is completely flat.
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    • jeffbee 12 minutes ago
      I think this comes down to the DEM they are using. I think it would have come out better if they had used USGS 3DEP DTM at 25cm.

      Edited: which apparently is hosted for free on AWS S3.

    • almstimplmntd 6 minutes ago
      [dead]
  • pokpokpok 52 minutes ago
    The wiggle!

    (in honor of my old commute, which I miss)

    https://flattensf.com/#t~-122.40850~37.77493~-122.50940~37.7...

  • mvkel 48 minutes ago
    Absolutely love the live profile updating when you swipe from flatter to shorter.
  • Terr_ 47 minutes ago
    > The slider runs along the whole trade-off between distance and climbing [...] Climbing is cumulative gain

    Another mechanism might be a kind of user-defined cost-curve, where a gradual climb to 10 might be preferred over a steep climb to 8, etc.

    [-]
  • qurren 34 minutes ago
    Doesn't Google Maps in bicycle mode already do this?
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    • Arainach 4 minutes ago
      There are many constraints to satisfy, and avoiding hills is but one of them.

      Most of us would take a hill with a protected bike lane over a flat 45mph.

  • tedd4u 51 minutes ago
    Cool! Any way to toggle on street names on the map?
  • fnord77 11 minutes ago
    Try downtown to somewhere in Bernal, say Progressive Grounds coffee house.

    The flattest route is only 0.2 miles longer than the shortest, but goes from 200ft of climbing to 500ft of climbing, 12% max grade to 22% max grade.

    Apple maps picks the shortest every fucking time.