Class WKTReader

Converts a geometry in Well-Known Text format to a Geometry.

WKTReader supports extracting Geometry objects from either Readers or Strings. This allows it to function as a parser to read Geometry objects from text blocks embedded in other data formats (e.g. XML).

A WKTReader is parameterized by a GeometryFactory, to allow it to create Geometry objects of the appropriate implementation. In particular, the GeometryFactory determines the PrecisionModel and SRID that is used.

The WKTReader converts all input numbers to the precise internal representation.

Notes:

• The reader supports non-standard "LINEARRING" tags.
• The reader uses Double.parseDouble to perform the conversion of ASCII numbers to floating point. This means it supports the Java syntax for floating point literals (including scientific notation).

Syntax

The following syntax specification describes the version of Well-Known Text supported by JTS. (The specification uses a syntax language similar to that used in the C and Java language specifications.)

 WKTGeometry: one of

       WKTPoint  WKTLineString  WKTLinearRing  WKTPolygon
       WKTMultiPoint  WKTMultiLineString  WKTMultiPolygon
       WKTGeometryCollection

 WKTPoint: POINT ( Coordinate )

 WKTLineString: LINESTRING CoordinateSequence

 WKTLinearRing: LINEARRING CoordinateSequence

 WKTPolygon: POLYGON CoordinateSequenceList

 WKTMultiPoint: MULTIPOINT CoordinateSequence

 WKTMultiLineString: MULTILINESTRING CoordinateSequenceList

 WKTMultiPolygon:
         MULTIPOLYGON ( CoordinateSequenceList { , CoordinateSequenceList } )

 WKTGeometryCollection: 
         GEOMETRYCOLLECTION ( WKTGeometry { , WKTGeometry } )

 CoordinateSequenceList:
         ( CoordinateSequence { , CoordinateSequence } )

 CoordinateSequence:
         ( Coordinate { , Coordinate } )

 Coordinate:
         Number Number Numberopt

 Number: A Java-style floating-point number

 

public WKTReader()

public WKTReader(GeometryFactory geometryFactory)

public Geometry read(Reader reader)
            throws ParseException

public Geometry read(String wellKnownText)
            throws ParseException