Volunteers from around the world can contribute to the first stage of the process as long as they have an internet connection. The process involves identifying roads and buildings from satellite images and outlining them. There are various projects available here along with full instructions and a demo film.
We also have a Slack channel where you can get training, ask questions about any aspect of the project and get feedback on your mapping.
You can now take quizzes and get digital badges for your achievement, more details here.
For volunteers who are confident and accurate with their mapping, it is possible to take on the role of validating.