it might work better as a more chaotic (two-way) hash function, true - next door streets different by at least half the letters, or something. Or at least with

it might work better as a more chaotic (two-way) hash function, true - next door streets different by at least half the letters, or something. Or at least with a prefix for the higher-significance bits, like "town", and a suffix for the lower significance bits, like "street".