StreetEasy's Stack

Sebastian Delmont (
Stack Yerba Buena Salon 12-14
Presentation: StreetEasy_s Stack Presentation [PDF]

StreetEasy rolls their own maps. They depend on OSM data and a custom tileset served by Mapbox.

  • Custom map tileset, covering NYC (all 5 boros) zoom levels 10 to 19
    - developed in-house using TileMill
    - data from OSM,, and our own
  • Maps served from MapBox
    - Using their server-side map composition tools
    - Serving about 2M tiles per day (for 500K-700K pageviews)
  • Maps embedded using Leaflet
  • JS generated via our own ruby abstraction classes used on a rails app.
  • Marker clustering done server-side with custom ruby/rails code, updated via ajax
  • Custom polygon editing, adapted/ported to leaflet (and in the process of being cleaned up for contribution back into leaflet)
  • Geocoder built in-house (using, yes, you guessed right, ruby), based on data plus our own updates
Photo of Sebastian Delmont

Sebastian Delmont

Since his business card at wasn’t big enough to include “senior developer”, “lead architect”, “interaction designer”, “information architect”, “vp of infrastructure”, “founder” and “graphics designer”, he went with the shorter “awesome geek”.

Sebastian has more than 15 years of experience as a Web Developer, and more than 11 as a New Yorker.

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Picture of Bill Wendel
Bill Wendel
04/03/2012 5:26am PDT

True that #StreetEasy has 22M pageviews/mo, while largest NYC #realestate broker only has 2M/mo? Are U using maps to crowdsource info or feedback from those users? If so, what are #homebuyers most likely to contribute that is actionable?

  • Esri
  • AT&T Interactive
  • Google
  • Nokia, Location & Commerce
  • Facebook
  • Bing
  • Control Group
  • Localeze
  • MyCityWay
  • Socrata
  • Urban Airship
  • MapQuest

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