====== OSM overpass-api ======
http://overpass-turbo.eu/
Documentation:
* [[https://wiki.openstreetmap.org/wiki/FR:Overpass_API/Overpass_QL|FR:Overpass API/Overpass QL]]
* [[https://wiki.openstreetmap.org/wiki/Overpass_API/Overp... ule/minuscule, on rajoute un '',i'' après
la doc https://wiki.openstreetmap.org/wiki/FR:Overpass_API/Ov
from http://www.phpclasses.org/package/7147-PHP-Perform-calculations-with-geographic-coordinates.html
... php
/**
* Copyright (c) 2011 by Menno Bieringa - http://www.mennobieringa.nl
*
* All rights reserved.