/**
* Create a tile with the given zoom level that contains the given
* location.
*
* The values are not checked for validity.
*
* @pre @code location.valid() && zoom <= 30 @endcode
*/
explicit Tile(uint32_t zoom, const osmium::Location& location) :
z(zoom) {
assert(zoom <= 30u);
assert(location.valid());
const auto coordinates = lonlat_to_mercator(location);
x = mercx_to_tilex(zoom, coordinates.x);
y = mercy_to_tiley(zoom, coordinates.y);
}
explicit Tile(uint32_t zoom, const osmium::Location& location) :
z(zoom) {
osmium::geom::Coordinates c = lonlat_to_mercator(location);
const int32_t n = 1 << zoom;
const double scale = detail::max_coordinate_epsg3857 * 2 / n;
x = uint32_t(detail::restrict_to_range<int32_t>(int32_t((c.x + detail::max_coordinate_epsg3857) / scale), 0, n-1));
y = uint32_t(detail::restrict_to_range<int32_t>(int32_t((detail::max_coordinate_epsg3857 - c.y) / scale), 0, n-1));
}