C# Class SharpMap.Converters.WellKnownText.GeometryFromWKT

Converts a Well-known Text representation to a SharpMap.Geometries.Geometry instance.

The Well-Known Text (WKT) representation of Geometry is designed to exchange geometry data in ASCII form.

Examples of WKT representations of geometry objects are: Geometry WKT Representation A Point POINT(15 20)
Note that point coordinates are specified with no separating comma. A LineString with four points: LINESTRING(0 0, 10 10, 20 25, 50 60) A Polygon with one exterior ring and one interior ring: POLYGON((0 0,10 0,10 10,0 10,0 0),(5 5,7 5,7 7,5 7, 5 5)) A MultiPoint with three Point values: MULTIPOINT(0 0, 20 20, 60 60) A MultiLineString with two LineString values: MULTILINESTRING((10 10, 20 20), (15 15, 30 15)) A MultiPolygon with two Polygon values: MULTIPOLYGON(((0 0,10 0,10 10,0 10,0 0)),((5 5,7 5,7 7,5 7, 5 5))) A GeometryCollection consisting of two Point values and one LineString: GEOMETRYCOLLECTION(POINT(10 10), POINT(30 30), LINESTRING(15 15, 20 20))

显示文件 Open project: jumpinjackie/fdotoolbox

Public Methods

Method	Description
Parse ( System reader ) : Geometry	Converts a Well-known Text representation to a SharpMap.Geometries.Geometry.
Parse ( string wellKnownText ) : Geometry	Converts a Well-known text representation to a SharpMap.Geometries.Geometry.

Private Methods

Method	Description
GetCoordinates ( WktStreamTokenizer tokenizer ) : List	Returns the next array of Coordinates in the stream.
GetNextCloser ( WktStreamTokenizer tokenizer ) : string	Returns the next ")" in the stream. ParseException is thrown if the next token is not ")".
GetNextCloserOrComma ( WktStreamTokenizer tokenizer ) : string	Returns the next ")" or "," in the stream. ParseException is thrown if the next token is not ")" or ",".
GetNextEmptyOrOpener ( WktStreamTokenizer tokenizer ) : string	Returns the next "EMPTY" or "(" in the stream as uppercase text. ParseException is thrown if the next token is not "EMPTY" or "(".
GetNextNumber ( WktStreamTokenizer tokenizer ) : double	Returns the next number in the stream. ParseException is thrown if the next token is not a number.
GetNextWord ( WktStreamTokenizer tokenizer ) : string	Returns the next word in the stream as uppercase text. Exception is thrown if the next token is not a word.
ReadGeometryCollectionText ( WktStreamTokenizer tokenizer ) : GeometryCollection	Creates a GeometryCollection using the next token in the stream.
ReadGeometryTaggedText ( WktStreamTokenizer tokenizer ) : Geometry	Creates a Geometry using the next token in the stream. Exception is thrown if the coordinates used to create a Polygon shell and holes do not form closed linestrings, or if an unexpected token is encountered.
ReadLineStringText ( WktStreamTokenizer tokenizer ) : LineString	Creates a LineString using the next token in the stream. ParseException is thrown if an unexpected token is encountered.
ReadMultiLineStringText ( WktStreamTokenizer tokenizer ) : MultiLineString	Creates a MultiLineString using the next token in the stream.
ReadMultiPointText ( WktStreamTokenizer tokenizer ) : MultiPoint	Creates a Point using the next token in the stream. ParseException is thrown if an unexpected token is encountered.
ReadMultiPolygonText ( WktStreamTokenizer tokenizer ) : MultiPolygon	Creates a MultiPolygon using the next token in the stream.
ReadPointText ( WktStreamTokenizer tokenizer ) : System.Point	Creates a Point using the next token in the stream. ParseException is thrown if an unexpected token is encountered.
ReadPolygonText ( WktStreamTokenizer tokenizer ) : Polygon	Creates a Polygon using the next token in the stream. ParseException is thown if the coordinates used to create the Polygon shell and holes do not form closed linestrings, or if an unexpected token is encountered.

Method Details

Parse() public static method

Converts a Well-known Text representation to a SharpMap.Geometries.Geometry.

public static Parse ( System reader ) : Geometry
reader	System	A Reader which will return a Geometry Tagged Text /// string (see the OpenGIS Simple Features Specification)
return	Geometry

Parse() public static method

Converts a Well-known text representation to a SharpMap.Geometries.Geometry.

public static Parse ( string wellKnownText ) : Geometry
wellKnownText	string	A tagged text string ( see the OpenGIS Simple Features Specification.
return	Geometry