geos::index::VertexSequencePackedRtree Class Reference

#include <VertexSequencePackedRtree.h>

Public Member Functions
	VertexSequencePackedRtree (const CoordinateSequence &pts)
std::vector< Envelope >	getBounds ()
void	remove (std::size_t index)
void	query (const Envelope &queryEnv, std::vector< std::size_t > &result) const

Detailed Description

A semi-static spatial index for points which occur in a spatially-coherent sequence. In particular, this is suitable for indexing the vertices of a geos::geom::LineString or geos::geom::Polygon ring.

The index is constructed in a batch fashion on a given sequence of coordinates. Coordinates can be removed via the remove() method.

Note that this index queries only the individual points of the input coordinate sequence, not any line segments which might be lie between them.

Author

Martin Davis

Constructor & Destructor Documentation

VertexSequencePackedRtree()

geos::index::VertexSequencePackedRtree::VertexSequencePackedRtree

(

const CoordinateSequence &

pts

)

Creates a new tree over the given sequence of coordinates. The sequence should be spatially coherent to provide query performance.

Parameters

pts	a sequence of points

Member Function Documentation

query()

void geos::index::VertexSequencePackedRtree::query	(	const Envelope &	queryEnv,
		std::vector< std::size_t > &	result
	)		const

Queries the index to find all items which intersect an extent. The query result is a list of the indices of input coordinates which intersect the extent.

Parameters

queryEnv	the query extent
result	vector to fill with results

remove()

void geos::index::VertexSequencePackedRtree::remove

(

std::size_t

index

)

Removes the input item at the given index from the spatial index.

Parameters

index

the index of the item in the input

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

• VertexSequencePackedRtree.h