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Maproulette3 screenshot.png
Author: Martijn van Exel
License: MIT (free of charge)
Platform: Web
Version: 3.3.3 (2019-09-11)
Language: English
Source code:
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!

Recent News

Challenges and Projects

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.


Fix Tasks in the Challenges listed below between September 7 and September 30 (inclusive)! There's prizes for the top fixers. Participants with U.S address only.

User:mvexel talks a little more about it and the prizes you can win in the SOTM US talk (link is to the correct point in the video).

Follow @maproulette on Twitter for updates and news on future competitions!