Press the rectangle button, select a rectangle on a map and wait. It will generate map from OpenStreetMap data It is an example of a very simple map style, showing water, forest, buildings and marinas.

More detailed instructions

Even more info

Have fun with using OpenStreetMap data for interesting and/or useful purposes! Just remember that you must mention the source of data in a way visible to whoever will be using it. See this page for details, including cases where it is legally allowed to avoid giving a clear credit (but I encourage to do this in all cases).

If you liked this tool, something was confusing - you are welcomed to comment about it by creating a public issue or by sending me an email. You can also post a comment in OSM diary entry.

If you want to map something (map missing objects, fix a mistake) and you are unsure how to start - visit, zoom in to an interesting area and press the "edit" button and follow instructions. You can contact the OpenStreetMap community using one of global or local channels listed at and ask for help.

You can visit matkoniecz/lunar_assembler to see code, obtain code or contribute. This software is AGPLv3 licenced.