Anyone can change the data in OpenStreetMap itself and add new data. This step-by-step guide shows how to do it:


Visit http://www.openstreetmap.org/user/new and sign-up for an account.

You can use any username. Note that it is public and all your edits are associated with it. Your e-mail address will not be shared, but other users can send you private messages that are forwarded to your e-mail address. Your password must be at least 8 characters long.

Sign-up

You should receive a confirmation e-mail with a link - click this link. You can now select your hometown by clicking on the map, so that others that can see who is active in the area.

Browse to http://www.openstreetmap.org/ and choose any part of the map (for example, an area that has a mistake) and click on the Edit button (above).

Editing OSM

The iD is currently the default editor on OpenStreetMap. When you launch it for the first time you can follow a walkthrough that will give you a quick tutorial on how to edit the map. You can also chose to skip the tutorial, but we highly recommend trying it out.

Beginning to edit OSM

Of course that was only a small start and there are many other ways to work with the OSM database. Offline editors(JOSM, Merkaartor) offer more features than the iD browser, but must first be installed.

JOSM Editor