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Converts the given coordinates to a Geohash.
A geohash is a single string of letters and digits of an arbitrary length – the longer, the more precise. A geohash guarantees, that two hashes with a shared prefix are close together (however the reverse is not guaranteed). This still makes geohashes useful e.g. for indexation, etc.
A hash can be shortened at the end, which means losing precision. For the precision depending on the number of characters, see here:
| Hash length | Error |
|---|---|
| 1 | ± 2,500 km |
| 2 | ± 630 km |
| 3 | ± 78 km |
| 4 | ± 20 km |
| 5 | ± 2.4 km |
| 6 | ± 610 m |
| 7 | ± 76 m |
| 8 | ± 19 m |
Example: For a coordinate of 42.605, -5.603, the geohash of length 5 is ezs42.
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