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Maproulette3 screenshot.png
Authors Martijn van Exel, for contributors see GitHub
License MIT (free of charge)
Platform Web
Version 3.5.2 (2019-12-18)
Language English
Source code (web site / front end) and (server / back end)
Programming language JavaScript

Micro-task platform for OpenStreetMap

MapRoulette ( is a gamified approach to fixing OSM bugs that breaks common OpenStreetMap data problems into micro tasks. Grab yourself a small task and start improving OpenStreetMap!

User and Developer Documentation

See here

Recent News

Challenges and Projects

MapRoulette Logo

Tasks are divided into Challenges. Anyone can create a Challenge using the built-in Wizard. You can use an Overpass API query as the source of your tasks, or a GeoJSON file you already have.

A Project groups one or more Challenges. A Challenge can be part of more than one Project. Each Project has its own management page where you can see Leaderboards and progress.


The MapRoulette API lets you create and manage Projects and Challenges.

There is API documentation.


Past MapRoulette incarnations have addressed redaction bot cleanup, folded ways in TIGER data and fixing connectivity bugs.


As a result of the License Change, a lot of OSM data was deleted or reverted back to a previous version. The first version of MapRoulette was geared towards repairing this damage by identifying all the ways that were gone and inviting users to re-add the removed ways using the standard OSM editing tools.


The remap-a-tron proved to be a very successful tool. Perhaps it could be repurposed to help get other types of map bugs fixed? At State of the Map US 2012 in Portland, the next iteration of what would become MapRoulette was announced: the Un-Zorro-Tron, to help fix Zorro Ways in the United States OSM data.


The domain was registered on October 13, 2012, as is considered as the founding date for the project.

See also



The code, issues, and documentation are available on GitHub.


MapRoulette website