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

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perimeter (with strategy)

Calculates the perimeter of a geometry using the specified strategy.

Description

The function perimeter returns the perimeter of a geometry, using specified strategy

Synopsis

template<typename Geometry, typename Strategy>
default_length_result<Geometry>::type perimeter(Geometry const & geometry, Strategy const & strategy)

Parameters

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.

Returns

The calculated perimeter

Header

Either

#include <boost/geometry/geometry.hpp>

Or

#include <boost/geometry/algorithms/perimeter.hpp>

Conformance

The function perimeter is not defined by OGC.

[Note] Note

PostGIS contains an algorithm with the same name and the same functionality. See the PostGIS documentation.

Behavior

Case

Behavior

pointlike (e.g. point)

Returns zero

linear (e.g. linestring)

Returns zero

areal (e.g. polygon)

Returns the perimeter

Complexity

Linear


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