geometries.h File Reference

This file declares the geometry class hierarchy used by the server as the internal representation of geometries. More...

#include <cmath>
#include <cstdint>

Go to the source code of this file.

Classes
class	gis::Geometry
	Abstract superclass for all geometric objects. More...
class	gis::Point
	A 2d point. More...
class	gis::Curve
	An abstract 2d curve. More...
class	gis::Linestring
	A string of connected line segments. More...
class	gis::Linearring
	A ring-shaped linestring. More...
class	gis::Surface
	An abstract 2d surface. More...
class	gis::Polygon
	A polygon consisting of an outer ring and zero or more interior rings defining holes in the polygon. More...
class	gis::Geometrycollection
	A collection of geometries. More...
class	gis::Multipoint
	A collection of points. More...
class	gis::Multicurve
	An abstract collection of curves. More...
class	gis::Multilinestring
	A collection of linestrings. More...
class	gis::Multisurface
	An abstract collection of surfaces. More...
class	gis::Multipolygon
	A collection of polygons. More...

Namespaces
namespace	gis

Enumerations
enum class	gis::Geometry_type : std::uint32_t {   gis::kGeometry = 0 , gis::kPoint = 1 , gis::kLinestring = 2 , gis::kPolygon = 3 ,   gis::kMultipoint = 4 , gis::kMultilinestring = 5 , gis::kMultipolygon = 6 , gis::kGeometrycollection = 7 }
	Types of geometry objects. More...
enum class	gis::Coordinate_system { gis::kCartesian = 0 , gis::kGeographic = 1 }
	Types of coordinate systems. More...
enum class	gis::Ring_direction { gis::kCW = 0 , gis::kCCW = 1 , gis::kUnknown = 2 }
	Direction of a ring. More...

Functions
bool	gis::operator< (const Point &lhs, const Point &rhs)
	Compares two points. More...
const char *	gis::type_to_name (Geometry_type type)
	Get the type name string corresponding to a geometry type. More...

Detailed Description

This file declares the geometry class hierarchy used by the server as the internal representation of geometries.

The hierarchy is closely modelled after the hierarchy in SFA-CA (OGC 06-103r4), but since Boost.Geometry depends on type traits to know if a geometry is in a Cartesian or geographic SRS, there are Cartesian and geographic specializations of each instantiable type in the SFA-CA. These are defined in geometries_cs.h.

Because of Boost.Geometry, iterators have to be of coordinate system specific types. It is therefore not possible to have the standard begin() and end() iterators in the common superclass. Instead, operator[] is provided as a coordinate system agnostic option.

See also

geometries_cs.h