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Calculate the distance of two geometries.
The default strategy is used, corresponding to the coordinate system of the geometries
template<typename Geometry1, typename Geometry2> default_distance_result<Geometry1, Geometry2>::type distance(Geometry1 const & geometry1, Geometry2 const & geometry2)
| Type | Concept | Name | Description | 
|---|---|---|---|
| Geometry1 const & | Any type fulfilling a Geometry Concept | geometry1 | A model of the specified concept | 
| Geometry2 const & | Any type fulfilling a Geometry Concept | geometry2 | A model of the specified concept | 
The calculated distance
Either
            #include <boost/geometry.hpp>
          
Or
            #include <boost/geometry/algorithms/distance.hpp>
          
The function distance implements function Distance from the OGC Simple Feature Specification.
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| Segment | 
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| Box | 
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| Linestring | 
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| Ring | 
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| Polygon | 
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| MultiPoint | 
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| MultiLinestring | 
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| MultiPolygon | 
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| Variant | 
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For point to geometry: linear
For multi-point to ring/polygon/multi-polygon: currently quadratic
For all other geometry combinations: linearithmic
Shows calculation of distance of point to some other geometries
#include <iostream> #include <list> #include <boost/geometry.hpp> #include <boost/geometry/geometries/linestring.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/polygon.hpp> #include <boost/geometry/geometries/multi_point.hpp> #include <boost/geometry/geometries/multi_polygon.hpp> #include <boost/foreach.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::model::linestring<point_type> linestring_type; typedef boost::geometry::model::multi_point<point_type> multi_point_type; point_type p(1,2); polygon_type poly; linestring_type line; multi_point_type mp; boost::geometry::read_wkt( "POLYGON((2 1.3,2.4 1.7,2.8 1.8,3.4 1.2,3.7 1.6,3.4 2,4.1 3,5.3 2.6,5.4 1.2,4.9 0.8,2.9 0.7,2 1.3)" "(4.0 2.0, 4.2 1.4, 4.8 1.9, 4.4 2.2, 4.0 2.0))", poly); line.push_back(point_type(0,0)); line.push_back(point_type(0,3)); mp.push_back(point_type(0,0)); mp.push_back(point_type(3,3)); std::cout << "Point-Poly: " << boost::geometry::distance(p, poly) << std::endl << "Point-Line: " << boost::geometry::distance(p, line) << std::endl << "Point-MultiPoint: " << boost::geometry::distance(p, mp) << std::endl; return 0; }
Output:
Point-Poly: 1.22066 Point-Line: 1 Point-MultiPoint: 2.23607