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#### coordinate_system

Metafunction defining type as the coordinate system (cartesian, spherical, etc) of the point type making up the specified geometry type.

###### Synopsis

    template<typename Geometry>
    struct coordinate_system
    {
      // ...
    };

###### Template parameter(s)

Parameter | Description
--- | ---
typename Geometry | Any type fulfilling a Geometry Concept

###### Header

Either

`#include <boost/geometry.hpp>`

Or

`#include <boost/geometry/core/coordinate_system.hpp>`

###### Complexity

Compile time

###### Example

Examine the coordinate system of a point

    #include <iostream>
    #include <typeinfo>

    #include <boost/geometry.hpp>
    #include <boost/geometry/geometries/polygon.hpp>
    #include <boost/geometry/geometries/point_xy.hpp>

    int main()
    {
        typedef boost::geometry::model::d2::point_xy<double> point_type;
        typedef boost::geometry::model::polygon<point_type> polygon_type;

        typedef boost::geometry::coordinate_system<polygon_type>::type system;

        std::cout << "system: " << typeid(system).name() << std::endl;

        return 0;
    }

Output (using MSVC):

    system: struct boost::geometry::cs::cartesian