Geohash: Difference between revisions
Content added Content deleted
m (simplify syntax) |
m (add decoder) |
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<lang python>ch32 = "0123456789bcdefghjkmnpqrstuvwxyz" |
<lang python>ch32 = "0123456789bcdefghjkmnpqrstuvwxyz" |
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bool2ch = {f"{i:05b}": ch for i, ch in enumerate(ch32)} |
bool2ch = {f"{i:05b}": ch for i, ch in enumerate(ch32)} |
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ch2bool = {v : k for k, v in bool2ch.items()} |
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def bisect(val, mn, mx, bits): |
def bisect(val, mn, mx, bits): |
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return ''.join(geo) |
return ''.join(geo) |
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def decoder(geo): |
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minmaxes, latlong = [[-90.0, 90.0], [-180.0, 180.0]], True |
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for c in geo: |
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for bit in ch2bool[c]: |
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minmaxes[latlong][bit != '1'] = sum(minmaxes[latlong]) / 2 |
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latlong = not latlong |
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return minmaxes |
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if __name__ == '__main__': |
if __name__ == '__main__': |
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