We regularly use Notes on OpenStreetMap to share and solve problems on the map. With Notes, anyone can quickly point out errors or omissions in the map and ask for verification from local contributors.

Whether you are a new user or a power mapper, here are tips to leverage the power of Notes on OpenStreetMap.

Help resolve Notes

To get started, take a look at open Notes in an area familiar to you. Go to OpenStreetMap.org and enable the Map Notes overlay, and you will see unresolved Notes in your area.

find_notes Finding notes on OpenStreetMap.

Red markers are currently unresolved Notes. Click a marker to display the details of the Note on the left panel. If you can fix the problem, edit the data using your favorite OpenStreetMap editor. Once you resolve a Note, add a comment and mark Comment & Resolve. The marker will turn green to show that it has resolved.

resolve_notes Resolve notes in your local area.

Add a Note

When you are unable to reliably verify a problem based on Bing or Mapbox Satellite imagery or other sources, or are unsure how to fully map the feature, add a Note to discuss the feature in question with the community. Mappers with local knowledge in the area can review your Note, and make sure that OpenStreetMap data matches the on-the-ground reality.

add_notes Add a note on OpenStreetMap - you can also do this using the JOSM editor.

Click the Add a note to the map icon. Move the marker precisely to the location of concern, and type up a relevant comment or question that explains the issue. Give other mappers a clear understanding of the problem, so they can take action and provide the best possible update to the map.

Now that you are familiar with Notes, try it out, and help improve the data on OpenStreetMap. If you are new to the OpenStreetMap project, take a look at our OpenStreetMap 101 series to learn how to get started.

Hit me up on Twitter for any questions or for sharing interesting stories related to your Notes.