# geos::geomgraph Namespace Reference

Contains classes that implement topology graphs. More...

## Classes

class | DirectedEdge
| A directed EdgeEnd. More...
class | DirectedEdgeStar
| A DirectedEdgeStar is an ordered list of outgoing DirectedEdges around a node. More...
class | EdgeEnd
| Models the end of an edge incident on a node. More...
class | EdgeEndStar
| A EdgeEndStar is an ordered list of EdgeEnds around a node. More...
class | EdgeIntersectionList
class | EdgeNodingValidator
class | Label
| A `Label` indicates the topological relationship of a component of a topology graph to a given `Geometry`. This class supports labels for relationships to two `Geometry`s, which is sufficient for algorithms for binary operations. More...
class | PlanarGraph
| Represents a directed graph which is embeddable in a planar surface. More...
class | Quadrant
class | TopologyLocation
| A TopologyLocation is the labelling of a GraphComponent's topological relationship to a single Geometry. More...

## Functions

bool | operator== (const Edge &a, const Edge &b)
std::ostream & | operator<< (std::ostream &os, const Edge &el)
std::ostream & | operator<< (std::ostream &, const EdgeEnd &)
std::ostream & | operator<< (std::ostream &os, const EdgeList &el)
std::ostream & | operator<< (std::ostream &os, const EdgeRing &er)
std::ostream & | operator<< (std::ostream &, const Label &)
std::ostream & | operator<< (std::ostream &os, const Node &node)
std::ostream & | operator<< (std::ostream &, const TopologyLocation &)

## Detailed Description

Contains classes that implement topology graphs.

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 JTS 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