geos::geom Namespace Reference

Namespaces
namespace	prep
	Contains classes and interfaces implementing algorithms that optimize the performance of repeated calls to specific geometric operations.
namespace	util
	Provides classes that parse and modify Geometry objects.

Classes
class	Coordinate
	Coordinate is the lightweight class used to store coordinates. More...
class	CoordinateArraySequence
	The default implementation of CoordinateSequence. More...
class	CoordinateArraySequenceFactory
	Creates CoordinateSequences internally represented as an array of Coordinates. More...
class	CoordinateFilter
	Geometry classes support the concept of applying a coordinate filter to every coordinate in the Geometry. More...
struct	CoordinateLessThen
	Strict weak ordering Functor for Coordinate. More...
class	CoordinateList
	A list of Coordinates, which may be set to prevent repeated coordinates from occuring in the list. More...
class	CoordinateSequence
	The internal representation of a list of coordinates inside a Geometry. More...
class	CoordinateSequenceFactory
	A factory to create concrete instances of CoordinateSequences. More...
class	CoordinateSequenceFilter
	Interface for classes which provide operations that can be applied to the coordinates in a CoordinateSequence. More...
class	Dimension
class	Envelope
	An Envelope defines a rectangulare region of the 2D coordinate plane. More...
class	Geometry
	Basic implementation of Geometry, constructed and destructed by GeometryFactory. More...
class	GeometryCollection
	Represents a collection of heterogeneous Geometry objects. More...
class	GeometryComponentFilter
class	GeometryFactory
	Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geometry objects. More...
class	GeometryFilter
	Geometry classes support the concept of applying a Geometry filter to the Geometry. More...
class	IntersectionMatrix
	Implementation of Dimensionally Extended Nine-Intersection Model (DE-9IM) matrix. More...
class	LinearRing
	Models an OGC SFS LinearRing. A LinearRing is a LineString which is both closed and simple. More...
class	LineSegment
class	LineString
class	MultiLineString
	Models a collection of LineStrings. More...
class	MultiPoint
class	MultiPolygon
class	Point
class	Polygon
	Represents a linear polygon, which may include holes. More...
class	Position
	A Position indicates the position of a Location relative to a graph component (Node, Edge, or Area). More...
class	PrecisionModel
	Specifies the precision model of the Coordinate in a Geometry. More...
class	Quadrant
	Utility functions for working with quadrants. More...
class	Triangle
	Represents a planar triangle, and provides methods for calculating various properties of triangles. More...

Typedefs
typedef CoordinateArraySequence	DefaultCoordinateSequence
	This is for backward API compatibility.
typedef CoordinateArraySequenceFactory	DefaultCoordinateSequenceFactory
	This is for backward API compatibility.

Enumerations
enum	GeometryTypeId {   GEOS_POINT , GEOS_LINESTRING , GEOS_LINEARRING , GEOS_POLYGON ,   GEOS_MULTIPOINT , GEOS_MULTILINESTRING , GEOS_MULTIPOLYGON , GEOS_GEOMETRYCOLLECTION }
	Geometry types. More...
enum	GeometrySortIndex {   SORTINDEX_POINT = 0 , SORTINDEX_MULTIPOINT = 1 , SORTINDEX_LINESTRING = 2 , SORTINDEX_LINEARRING = 3 ,   SORTINDEX_MULTILINESTRING = 4 , SORTINDEX_POLYGON = 5 , SORTINDEX_MULTIPOLYGON = 6 , SORTINDEX_GEOMETRYCOLLECTION = 7 }
enum class	Location : char { NONE = (char)(-1) , INTERIOR = 0 , BOUNDARY = 1 , EXTERIOR = 2 }
	Constants representing the location of a point relative to a geometry. More...

Functions
bool	operator< (const Coordinate &a, const Coordinate &b)
	Strict weak ordering operator for Coordinate.
std::ostream &	operator<< (std::ostream &os, const CoordinateList &cl)
std::ostream &	operator<< (std::ostream &os, const CoordinateSequence &cs)
bool	operator== (const CoordinateSequence &s1, const CoordinateSequence &s2)
bool	operator!= (const CoordinateSequence &s1, const CoordinateSequence &s2)
std::ostream &	operator<< (std::ostream &os, const Envelope &o)
	Output operator.
std::ostream &	operator<< (std::ostream &os, const Geometry &geom)
	Write the Well-known Binary representation of this Geometry as an HEX string to the given output stream.
std::string	geosversion ()
	Return current GEOS version.
std::string	jtsport ()
	Return the version of JTS this GEOS release has been ported from.
std::unique_ptr< Geometry >	HeuristicOverlay (const Geometry *g0, const Geometry *g1, int opCode)
std::ostream &	operator<< (std::ostream &os, const IntersectionMatrix &im)
std::ostream &	operator<< (std::ostream &os, const Location &loc)

Detailed Description

Contains the Geometry interface hierarchy and supporting classes.

The Java Topology Suite (JTS) is a Java API that implements a core set of spatial data operations using an explicit precision model and robust geometric algorithms. JTS is int ended to be used in the development of applications that support the validation, cleaning, integration and querying of spatial datasets.

JTS attempts to implement the OpenGIS Simple Features Specification (SFS) as accurately as possible. In some cases the SFS is unclear or omits a specification; in this case J TS attempts to choose a reasonable and consistent alternative. Differences from and elaborations of the SFS are documented in this specification.

Package Specification

• Java Topology Suite Technical Specifications
• OpenGIS Simple Features Specification for SQL

Enumeration Type Documentation

GeometryTypeId

enum geos::geom::GeometryTypeId

Geometry types.

Enumerator
GEOS_POINT	a point
GEOS_LINESTRING	a linestring
GEOS_LINEARRING	a linear ring (linestring with 1st point == last point)
GEOS_POLYGON	a polygon
GEOS_MULTIPOINT	a collection of points
GEOS_MULTILINESTRING	a collection of linestrings
GEOS_MULTIPOLYGON	a collection of polygons
GEOS_GEOMETRYCOLLECTION	a collection of heterogeneus geometries

Location

enum class geos::geom::Location : char

strong

Constants representing the location of a point relative to a geometry.

They can also be thought of as the row or column index of a DE-9IM matrix. For a description of the DE-9IM, see the [OpenGIS Simple Features Specification for SQL](http://www.opengis.org/techno/specs.htm").

Enumerator
NONE	Used for uninitialized location values.
INTERIOR	DE-9IM row index of the interior of the first geometry and column index of the interior of the second geometry. Location value for the interior of a geometry.
BOUNDARY	DE-9IM row index of the boundary of the first geometry and column index of the boundary of the second geometry. Location value for the boundary of a geometry.
EXTERIOR	DE-9IM row index of the exterior of the first geometry and column index of the exterior of the second geometry. Location value for the exterior of a geometry.