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#### coordinate_type

Metafunction defining type as the coordinate type (int, float, double, etc) of the point type making up the specified geometry type.

###### Synopsis

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

###### 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_type.hpp>`

###### Complexity

Compile time

###### Example

Examine the coordinate type 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()
    {
        using point_type = boost::geometry::model::d2::point_xy<double>;
        using polygon_type = boost::geometry::model::polygon<point_type>;

        using ctype = boost::geometry::coordinate_type<polygon_type>::type;

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

        return 0;
    }

Output (using MSVC):

    type: double