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True, but that is assuming that those streets ever existed. As far as I can tell from the article that's just an assumption. Although I think it would actually
by bitcurious 8y ago
True, but that is assuming that those streets ever existed. As far as I can tell from the article that's just an assumption.
Although I think it would actually be possible to use once-real-but-no-longer steets as trap streets, as long as your sources are improbable enough. For example, if you take a map from 1908, remove one street, then add in another single street from 1920, etc., your exact combination of streets could serve as proof of copyright infringement.
- ska 8y agosounds like more work than just making some trap streets. It brings up an interesting issue though - ideally if you have trap streets you would never want to use them in route finding...
- qubex 8y agoI hope they have some manner of “shearing off” the nodes that represent those streets and break the graph into two disjoint ones. That way they’re off on their own little island without a ferry connection and problems only arise if you ask for a route to, or are starting from within, somewhere that actually doesn’t have any ground truth.
- mannykannot 8y agoIn the accompanying aerial photograph, the outlines of the old streets are visible - together with a couple of others that do not appear on either map, and which run at an angle to the old grid.