Past Meetup

Geoprocessing with Turf.js

This Meetup is past

40 people went

Cambridge Innovation Center, 4th Floor Cafe

1 Broadway · Cambridge, MA

How to find us

Check in with your ID at security in the lobby and let them know you're here for Maptime, then head to the 4th floor.

Location image of event venue


July's Maptime will be led by special guest and neighbor to the north, Bill Morris ( For those of you loyal to our schedule, please note that the meetup is a week later than usual this month!

Interactive maps have been flourishing on the web for a decade now, but the stuff we think of as "geoprocessing" - distance calculations, proximity tests, area overlaps - have mostly occurred on servers or offline entirely. Join us and learn how to throw off those server-side shackles with turf.js (, the javascript geoprocessing engine, built for the nuts and bolts of geography on the web. We'll look at a few examples of turf in action behind the scenes of applications, and as a straight-up GIS-in-the-browser; bring a laptop to follow along if you like.

Casual cartographers, GIS analysts, and curious developers are all welcome!


Maptime is, rather literally, time for mapmaking. Our mission is to open the doors of cartographic possibility to anyone interested by creating a time and space for collaborative learning, exploration, and map creation using mapping tools and technologies.

This open learning environment for all levels and degrees of knowledge offers intentional support for the beginner. Maptime is simultaneously flexible and structured, creating space for workshops, ongoing projects with a shared goal, and independent/collaborative work time.

Inspiration for Maptime comes from both hack nights and knitting circles. Both are models of spaces for people to create and learn together. Our goal is to provide this space with an open heart and without pretension. You can bring your own projects to work on, or just hang out and socialize or ask questions. Some people are experts, and some people are just getting started, but all of us are learning, so why not do it together?

Maptime is hands-on, so don't forget to bring your laptop!