Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
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