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Maproulette3 screenshot.png
Authors: Martijn van Exel, for contributors see GitHub
License: MIT License (free of charge)
Platform: Web
Version: 3.13.1-rev4 (2023-09-19)
Languages: English, German, Afrikaans, Bulgarian, cz, Dutch, French, Galician, Japanese, Korean, ir, Portuguese, Breton, Russian, Spanish, Turkish, Ukrainian, Vietnamese, and Italian
Source code: osmlab/maproulette3 (web site / front end) and maproulette/maproulette2 (server / back end)
Programming language: JavaScript

Micro-task platform for OpenStreetMap

MapRoulette ( is a microtask platform and web application for OpenStreetMap. Grab yourself a small task and start improving OpenStreetMap!

MapRoulette is an OpenStreetMap US Charter Project.

User and Developer Documentation


The MapRoulette API lets you create and manage Projects and Challenges. See the API documentation.

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.

See the challenge and project list for an overview which challenges and projects can be solved with this tool.

Reporting problems

If you see bad edits in OSM that you think are to be blamed on a poorly designed MapRoulette Challenge, please see here for instructions on how to report the Challenge.


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

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