geos::io::WKTWriter Class Reference

Outputs the textual representation of a Geometry. See also WKTReader. More...

#include <geos.h>

Public Member Functions
std::string	write (const geom::Geometry *geometry)
	Returns WKT string for the given Geometry.
void	write (const geom::Geometry *geometry, Writer *writer)
std::string	writeFormatted (const geom::Geometry *geometry)
void	writeFormatted (const geom::Geometry *geometry, Writer *writer)
void	setRoundingPrecision (int p0)
void	setTrim (bool p0)
void	setOld3D (bool useOld3D)
int	getOutputDimension () const
void	setOutputDimension (int newOutputDimension)

Static Public Member Functions
static std::string	toLineString (const geom::CoordinateSequence &seq)
static std::string	toLineString (const geom::Coordinate &p0, const geom::Coordinate &p1)
static std::string	toPoint (const geom::Coordinate &p0)

Protected Member Functions
void	appendGeometryTaggedText (const geom::Geometry *geometry, int level, Writer *writer)
void	appendPointTaggedText (const geom::Coordinate *coordinate, int level, Writer *writer)
void	appendLineStringTaggedText (const geom::LineString *lineString, int level, Writer *writer)
void	appendLinearRingTaggedText (const geom::LinearRing *lineString, int level, Writer *writer)
void	appendPolygonTaggedText (const geom::Polygon *polygon, int level, Writer *writer)
void	appendMultiPointTaggedText (const geom::MultiPoint *multipoint, int level, Writer *writer)
void	appendMultiLineStringTaggedText (const geom::MultiLineString *multiLineString, int level, Writer *writer)
void	appendMultiPolygonTaggedText (const geom::MultiPolygon *multiPolygon, int level, Writer *writer)
void	appendGeometryCollectionTaggedText (const geom::GeometryCollection *geometryCollection, int level, Writer *writer)
void	appendPointText (const geom::Coordinate *coordinate, int level, Writer *writer)
void	appendCoordinate (const geom::Coordinate *coordinate, Writer *writer)
std::string	writeNumber (double d)
void	appendLineStringText (const geom::LineString *lineString, int level, bool doIndent, Writer *writer)
void	appendPolygonText (const geom::Polygon *polygon, int level, bool indentFirst, Writer *writer)
void	appendMultiPointText (const geom::MultiPoint *multiPoint, int level, Writer *writer)
void	appendMultiLineStringText (const geom::MultiLineString *multiLineString, int level, bool indentFirst, Writer *writer)
void	appendMultiPolygonText (const geom::MultiPolygon *multiPolygon, int level, Writer *writer)
void	appendGeometryCollectionText (const geom::GeometryCollection *geometryCollection, int level, Writer *writer)

Protected Attributes
int	decimalPlaces

Detailed Description

Outputs the textual representation of a Geometry. See also WKTReader.

The WKTWriter outputs coordinates rounded to the precision model. No more than the maximum number of necessary decimal places will be output.

The Well-known Text format is defined in the OpenGIS Simple Features Specification for SQL.

A non-standard "LINEARRING" tag is used for LinearRings. The WKT spec does not define a special tag for LinearRings. The standard tag to use is "LINESTRING".

See WKTReader for parsing.

Member Function Documentation

setOld3D()

void geos::io::WKTWriter::setOld3D ( bool useOld3D )

inline

Enable old style 3D/4D WKT generation.

By default the WKBWriter produces new style 3D/4D WKT (ie. "POINT Z (10 20 30)") but if this method is used to turn on old style WKT production then the WKT will be formatted in the style "POINT (10 20 30)".

Parameters

useOld3D

true or false

setRoundingPrecision()

void geos::io::WKTWriter::setRoundingPrecision

(

int

p0

)

Sets the rounding precision when writing the WKT a precision of -1 disables it

Parameters

p0	the new precision to use

setTrim()

void geos::io::WKTWriter::setTrim

(

bool

p0

)

Enables/disables trimming of unnecessary decimals

Parameters

p0	the trim boolean

toLineString() [1/2]

std::string geos::io::WKTWriter::toLineString ( const geom::Coordinate & p0, const geom::Coordinate & p1 )

static

Generates the WKT for a 2-point LineString.

Parameters

p0	the first coordinate
p1	the second coordinate

Returns

the WKT

toLineString() [2/2]

std::string geos::io::WKTWriter::toLineString ( const geom::CoordinateSequence & seq )

static

Generates the WKT for a N-point LineString.

Parameters

seq	the sequence to outpout

Returns

the WKT

toPoint()

std::string geos::io::WKTWriter::toPoint ( const geom::Coordinate & p0 )

static

Generates the WKT for a Point.

Parameters

p0	the point coordinate

Returns

the WKT

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

• WKTWriter.h