Adopt geohash as finger-print and spatial reference

[ppKrauss]

The Geohash function transforms lat-long standard coordinates into one base32 number that can be represented as 64bit number into databases. The two sides of the bridge offers latlog:

• Wikipedia offers LatLong P625 property.

• OSM nodes: as demonstrated by simple-osmWd2csv, is automatic to get from dump and convert to Geohash.

• OSM ways and relations: the BBOX of the geometry is a fast and universal characteristic of any geometry, and its scale (square-root of box area) can be used as precision reference to the length of the Geohash. The center of the BBOX is easy to be calculated, and it is used as "fake centroid" in Overpass and many other applications.

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Exemplo de link para resolução Geohash http://geohash.org/6uvxhgpts06:Q519154