The most important thing to remember is that you **cannot** get legal advice from the OpenStreetMap community, so no matter what answers you get here (including this one), if you need to be sure you should employ a lawyer to look at your precise circumstances. A slight variation that seems insignificant to you could alter the legal position of your use. However, the general rule is that if you can superimpose a separate dataset over OpenStreetMap data (often by compositing after rendering), and you do not change the OpenStreetMap data in any way, that is usually considered a produced work. If, however, your use of the data requires you to combine OpenStreetMap data with another source (e.g. a set of geodata containing streets that aren't in OSM) then that is a derived work. In either case you still need to credit OpenStreetMap as the source of your data. Remember: **this is not legal advice**.

The most important thing to remember is that you **cannot** get legal advice from the OpenStreetMap community, so no matter what answers you get here (including this one), if you need to be sure you should employ a lawyer to look at your precise circumstances. A slight variation that seems insignificant to you could alter the legal position of your use. However, the general rule is that if you can superimpose a separate dataset over OpenStreetMap data (often by compositing after rendering), and you do not change the OpenStreetMap data in any way, that is usually considered a produced work. If, however, your use of the data requires you to combine OpenStreetMap data with another source (e.g. a set of geodata containing streets that aren't in OSM) then that is a derived work.