geos::linearref::ExtractLineByLocation Class Reference

Extracts the subline of a linear Geometry between two LinearLocations on the line. More...

#include <ExtractLineByLocation.h>

Collaboration diagram for geos::linearref::ExtractLineByLocation:

Public Member Functions
	ExtractLineByLocation (const geom::Geometry *line)
std::unique_ptr< geom::Geometry >	extract (const LinearLocation &start, const LinearLocation &end)
	Extracts a subline of the input. More...

Static Public Member Functions
static std::unique_ptr< geom::Geometry >	extract (const geom::Geometry *line, const LinearLocation &start, const LinearLocation &end)
	Computes the subline of a LineString between two LinearLocations on the line. More...

Private Member Functions
std::unique_ptr< geom::Geometry >	reverse (const geom::Geometry *linear)
std::unique_ptr< geom::LineString >	computeLine (const LinearLocation &start, const LinearLocation &end)
std::unique_ptr< geom::Geometry >	computeLinear (const LinearLocation &start, const LinearLocation &end)

Private Attributes
const geom::Geometry *	line

Detailed Description

Extracts the subline of a linear Geometry between two LinearLocations on the line.

Definition at line 34 of file ExtractLineByLocation.h.

Constructor & Destructor Documentation

geos::linearref::ExtractLineByLocation::ExtractLineByLocation

(

const geom::Geometry *

line

)

Member Function Documentation

std::unique_ptr<geom::LineString> geos::linearref::ExtractLineByLocation::computeLine ( const LinearLocation &  start, const LinearLocation &  end  )

private

Assumes input is valid (e.g. start <= end)

Parameters

start
end

Returns

a linear geometry

std::unique_ptr<geom::Geometry> geos::linearref::ExtractLineByLocation::computeLinear ( const LinearLocation &  start, const LinearLocation &  end  )

private

Assumes input is valid (e.g. start <= end)

Parameters

start
end

Returns

a linear geometry

static std::unique_ptr<geom::Geometry> geos::linearref::ExtractLineByLocation::extract ( const geom::Geometry *  line, const LinearLocation &  start, const LinearLocation &  end  )

static

Computes the subline of a LineString between two LinearLocations on the line.

If the start location is after the end location, the computed geometry is reversed.

Parameters

line	the line to use as the baseline
start	the start location
end	the end location

Returns

the extracted subline

Referenced by geos::linearref::LocationIndexedLine::extractLine().

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std::unique_ptr<geom::Geometry> geos::linearref::ExtractLineByLocation::extract	(	const LinearLocation &	start,
		const LinearLocation &	end
	)

Extracts a subline of the input.

If end < start the linear geometry computed will be reversed.

Parameters

start	the start location
end	the end location

Returns

a linear geometry

std::unique_ptr<geom::Geometry> geos::linearref::ExtractLineByLocation::reverse ( const geom::Geometry *  linear )

private

Member Data Documentation

const geom::Geometry* geos::linearref::ExtractLineByLocation::line

private

Definition at line 37 of file ExtractLineByLocation.h.

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

• ExtractLineByLocation.h