This is a text-based in-browser editor for OSM data. See its wiki page and language guide.

You will need PHP with mod_gettext.

• Copy all files from www to a document root directory.
• Open this link and register your instance of Level0. It needs permissions for reading user details and modifying the map.
• Edit config.php, inserting both OAuth keys.
• Create data directory and give writing permissions for it to web server process. Check path in config.php.
• Check path to document root in locales/deploy_locales and run it.

You're set: download some data in the editor and login to OSM.

Oh, one more thing: there will be a lot of .base files in the data directory. To clean them, run crontab -e and add this line (change path accordingly):

0 * * * * find /var/www/level0/data -type f -mtime 1 -delete

Localization strings are managed with Transifex. There are not many of them, please add a translation for your language when you have time.

Level0 is written by Ilya Zverev and published under WTFPL license.