geos::io::WKTWriter Class Reference

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

#include <WKTWriter.h>

Public Member Functions
std::string	write (const geom::Geometry *geometry)
	Returns WKT string for the given Geometry.
std::string	write (const geom::Geometry &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	setRemoveEmptyDimensions (bool remove)
	setRemoveEmptyDimensions More...
void	setOld3D (bool useOld3D)
int	getOutputDimension () const
void	setOutputDimension (uint8_t 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)
static std::string	toPoint (const geom::CoordinateXY &p0)
static std::string	writeNumber (double d, bool trim, uint32_t precision)
static int	writeTrimmedNumber (double d, uint32_t precision, char *buf)

Protected Member Functions
void	appendGeometryTaggedText (const geom::Geometry &geometry, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendPointTaggedText (const geom::Point &point, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendLineStringTaggedText (const geom::LineString &lineString, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendLinearRingTaggedText (const geom::LinearRing &lineString, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendPolygonTaggedText (const geom::Polygon &polygon, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendMultiPointTaggedText (const geom::MultiPoint &multipoint, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendMultiLineStringTaggedText (const geom::MultiLineString &multiLineString, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendMultiPolygonTaggedText (const geom::MultiPolygon &multiPolygon, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendGeometryCollectionTaggedText (const geom::GeometryCollection &geometryCollection, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendOrdinateText (OrdinateSet outputOrdinates, Writer &writer) const
void	appendSequenceText (const geom::CoordinateSequence &seq, OrdinateSet outputOrdinates, int level, bool doIntent, Writer &writer) const
void	appendCoordinate (const geom::CoordinateXYZM &coordinate, OrdinateSet outputOrdinates, Writer &writer) const
std::string	writeNumber (double d) const
void	appendLineStringText (const geom::LineString &lineString, OrdinateSet outputOrdinates, int level, bool doIndent, Writer &writer) const
void	appendPolygonText (const geom::Polygon &polygon, OrdinateSet outputOrdinates, int level, bool indentFirst, Writer &writer) const
void	appendMultiPointText (const geom::MultiPoint &multiPoint, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendMultiLineStringText (const geom::MultiLineString &multiLineString, OrdinateSet outputOrdinates, int level, bool indentFirst, Writer &writer) const
void	appendMultiPolygonText (const geom::MultiPolygon &multiPolygon, OrdinateSet outputOrdinates, int level, Writer &writer) const
void	appendGeometryCollectionText (const geom::GeometryCollection &geometryCollection, OrdinateSet outputOrdinates, int level, Writer &writer) const

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 WKTWriter 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

setRemoveEmptyDimensions()

void geos::io::WKTWriter::setRemoveEmptyDimensions ( bool  remove )

inline

setRemoveEmptyDimensions

Enables/disables removal of Z/M dimensions that have no non-NaN values in a geometry.

Parameters

remove

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]

static 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]

static 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()

static 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