Anyone looking for this will already be in map/OpenStreetMap context. That people originating from StumbleUpon or a niche little place called ycombinator news are confused is not too surprising tbh: that very likely wasn't the audience they had in mind
Considering the title starts with "Show HN" and that the HN username is very closely tied to the GitHub username, I'm gonna go out on a limb here by saying HN is indeed the target audience.
