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Calculates the perimeter of a geometry using the specified strategy.
The function perimeter returns the perimeter of a geometry, using specified strategy
template<typename Geometry, typename Strategy> default_length_result<Geometry>::type perimeter(Geometry const & geometry, Strategy const & strategy)
| Type | Concept | Name | Description | 
|---|---|---|---|
| Geometry const & | Any type fulfilling a Geometry Concept | geometry | A model of the specified concept | 
| Strategy const & | Any type fulfilling a distance Strategy Concept | strategy | strategy to be used for distance calculations. | 
The calculated perimeter
Either
            #include <boost/geometry.hpp>
          
Or
            #include <boost/geometry/algorithms/perimeter.hpp>
          
The function perimeter is not defined by OGC.
| ![[Note]](../../../../../../../../doc/src/images/note.png) | Note | 
|---|---|
| PostGIS contains an algorithm with the same name and the same functionality. See the PostGIS documentation. | 
| Case | Behavior | 
|---|---|
| pointlike (e.g. point) | Returns zero | 
| linear (e.g. linestring) | Returns zero | 
| areal (e.g. polygon) | Returns the perimeter | 
Linear