| // Boost.Geometry (aka GGL, Generic Geometry Library) |
| // QuickBook Example |
| |
| // Copyright (c) 2011 Barend Gehrels, Amsterdam, the Netherlands. |
| |
| // Use, modification and distribution is subject to the Boost Software License, |
| // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| |
| //[degree_radian |
| //` Specify two coordinate systems, one in degrees, one in radians. |
| |
| #include <iostream> |
| #include <boost/geometry.hpp> |
| |
| using namespace boost::geometry; |
| |
| int main() |
| { |
| typedef model::point<double, 2, cs::spherical_equatorial<degree> > degree_point; |
| typedef model::point<double, 2, cs::spherical_equatorial<radian> > radian_point; |
| |
| degree_point d(4.893, 52.373); |
| radian_point r(0.041, 0.8527); |
| |
| double dist = distance(d, r); |
| std::cout |
| << "distance:" << std::endl |
| << dist << " over unit sphere" << std::endl |
| << dist * 3959 << " over a spherical earth, in miles" << std::endl; |
| |
| return 0; |
| } |
| |
| //] |
| |
| |
| //[degree_radian_output |
| /*` |
| Output: |
| [pre |
| distance: |
| 0.0675272 over unit sphere |
| 267.34 over a spherical earth, in miles |
| ] |
| */ |
| //] |