GEOS: geos::algorithm::InteriorPointArea Class Reference

GEOS 3.5.0

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geos::algorithm::InteriorPointArea Class Reference

Computes a point in the interior of an areal geometry. More...

`#include <InteriorPointArea.h>`

## Public Member Functions
| InteriorPointArea (const geom::Geometry *g)
bool | getInteriorPoint (geom::Coordinate &ret) const

## Detailed Description

Computes a point in the interior of an areal geometry.

## Algorithm

- Find a Y value which is close to the centre of the geometry's vertical extent but is different to any of it's Y ordinates.
- Create a horizontal bisector line using the Y value and the geometry's horizontal extent
- Find the intersection between the geometry and the horizontal bisector line. The intersection is a collection of lines and points.
- Pick the midpoint of the largest intersection geometry

Note: If a fixed precision model is used, in some cases this method may return a point which does not lie in the interior.

## Constructor & Destructor Documentation

geos::algorithm::InteriorPointArea::InteriorPointArea | ( | const geom::Geometry * | g | ) |

Creates a new interior point finder for an areal geometry.

Parameters

  g | an areal geometry

## Member Function Documentation

bool geos::algorithm::InteriorPointArea::getInteriorPoint | ( | geom::Coordinate & | ret | ) | const

Gets the computed interior point.

Returns
  the coordinate of an interior point

The documentation for this class was generated from the following file:

- InteriorPointArea.h