Handles storage of information regarding WKB types and their properties. More...

#include <qgswkbtypes.h>

Public Types
enum	GeometryType { PointGeometry, LineGeometry, PolygonGeometry, UnknownGeometry, NullGeometry }
	The geometry types are used to group QgsWkbTypes::Type in a coarse way. More...

enum	Type { Unknown = 0, Point = 1, LineString = 2, Polygon = 3, Triangle = 17, MultiPoint = 4, MultiLineString = 5, MultiPolygon = 6, GeometryCollection = 7, CircularString = 8, CompoundCurve = 9, CurvePolygon = 10, MultiCurve = 11, MultiSurface = 12, NoGeometry = 100, PointZ = 1001, LineStringZ = 1002, PolygonZ = 1003, TriangleZ = 1017, MultiPointZ = 1004, MultiLineStringZ = 1005, MultiPolygonZ = 1006, GeometryCollectionZ = 1007, CircularStringZ = 1008, CompoundCurveZ = 1009, CurvePolygonZ = 1010, MultiCurveZ = 1011, MultiSurfaceZ = 1012, PointM = 2001, LineStringM = 2002, PolygonM = 2003, TriangleM = 2017, MultiPointM = 2004, MultiLineStringM = 2005, MultiPolygonM = 2006, GeometryCollectionM = 2007, CircularStringM = 2008, CompoundCurveM = 2009, CurvePolygonM = 2010, MultiCurveM = 2011, MultiSurfaceM = 2012, PointZM = 3001, LineStringZM = 3002, PolygonZM = 3003, MultiPointZM = 3004, MultiLineStringZM = 3005, MultiPolygonZM = 3006, GeometryCollectionZM = 3007, CircularStringZM = 3008, CompoundCurveZM = 3009, CurvePolygonZM = 3010, MultiCurveZM = 3011, MultiSurfaceZM = 3012, TriangleZM = 3017, Point25D = 0x80000001, LineString25D, Polygon25D, MultiPoint25D, MultiLineString25D, MultiPolygon25D }
	The WKB type describes the number of dimensions a geometry has. More...

Static Public Member Functions
static Type	addM (Type type)
	Adds the m dimension to a WKB type and returns the new type. More...

static Type	addZ (Type type)
	Adds the z dimension to a WKB type and returns the new type. More...

static int	coordDimensions (Type type)
	Returns the coordinate dimension of the geometry type as an integer. More...

static QString	displayString (Type type)
	Returns a display string type for a WKB type, e.g., the geometry name used in WKT geometry representations. More...

static Type	dropM (Type type)
	Drops the m dimension (if present) for a WKB type and returns the new type. More...

static Type	dropZ (Type type)
	Drops the z dimension (if present) for a WKB type and returns the new type. More...

static Type	flatType (Type type)
	Returns the flat type for a WKB type. More...

static QString	geometryDisplayString (GeometryType type)
	Returns a display string for a geometry type. More...

static GeometryType	geometryType (Type type)
	Returns the geometry type for a WKB type, e.g., both MultiPolygon and CurvePolygon would have a PolygonGeometry geometry type. More...

static bool	hasM (Type type)
	Tests whether a WKB type contains m values. More...

static bool	hasZ (Type type)
	Tests whether a WKB type contains the z-dimension. More...

static bool	isCurvedType (Type type)
	Returns true if the WKB type is a curved type or can contain curved geometries. More...

static bool	isMultiType (Type type)
	Returns true if the WKB type is a multi type. More...

static bool	isSingleType (Type type)
	Returns true if the WKB type is a single type. More...

static Type	multiType (Type type)
	Returns the multi type for a WKB type. More...

static Type	parseType (const QString &wktStr)
	Attempts to extract the WKB type from a WKT string. More...

static Type	singleType (Type type)
	Returns the single type for a WKB type. More...

static Type	to25D (Type type)
	Will convert the 25D version of the flat type if supported or Unknown if not supported. More...

static int	wkbDimensions (Type type)
	Returns the inherent dimension of the geometry type as an integer. More...

static Type	zmType (Type type, bool hasZ, bool hasM)
	Returns the modified input geometry type according to hasZ / hasM. More...

Detailed Description

Handles storage of information regarding WKB types and their properties.

Since: QGIS 2.10

Definition at line 40 of file qgswkbtypes.h.

Member Enumeration Documentation

◆ GeometryType

enum QgsWkbTypes::GeometryType

The geometry types are used to group QgsWkbTypes::Type in a coarse way.

See also: geometryType( QgsWkbTypes::Type )

Enumerator
PointGeometry
LineGeometry
PolygonGeometry
UnknownGeometry
NullGeometry

Definition at line 137 of file qgswkbtypes.h.

◆ Type

enum QgsWkbTypes::Type

The WKB type describes the number of dimensions a geometry has.

Point
LineString
Polygon

as well as the number of dimensions for each individual vertex

X (always)
Y (always)
Z (optional)
M (measurement value, optional)

it also has values for multi types, collections, unknown geometry, null geometry, no geometry and curve support.

These classes of geometry are often used for data sources to communicate what kind of geometry should be expected for a given geometry field. It is also used for tools or algorithms to decide if they should be available for a given geometry type or act in a different mode.

Enumerator
Unknown
Point
LineString
Polygon
Triangle
MultiPoint
MultiLineString
MultiPolygon
GeometryCollection
CircularString
CompoundCurve
CurvePolygon
MultiCurve
MultiSurface
NoGeometry
PointZ
LineStringZ
PolygonZ
TriangleZ
MultiPointZ
MultiLineStringZ
MultiPolygonZ
GeometryCollectionZ
CircularStringZ
CompoundCurveZ
CurvePolygonZ
MultiCurveZ
MultiSurfaceZ
PointM
LineStringM
PolygonM
TriangleM
MultiPointM
MultiLineStringM
MultiPolygonM
GeometryCollectionM
CircularStringM
CompoundCurveM
CurvePolygonM
MultiCurveM
MultiSurfaceM
PointZM
LineStringZM
PolygonZM
MultiPointZM
MultiLineStringZM
MultiPolygonZM
GeometryCollectionZM
CircularStringZM
CompoundCurveZM
CurvePolygonZM
MultiCurveZM
MultiSurfaceZM
TriangleZM
Point25D
LineString25D
Polygon25D
MultiPoint25D
MultiLineString25D
MultiPolygon25D

Definition at line 67 of file qgswkbtypes.h.

Member Function Documentation

◆ addM()

static Type QgsWkbTypes::addM ( Type type )

inlinestatic

Adds the m dimension to a WKB type and returns the new type.

Parameters

type	original type

See also: addZ(); dropM(); hasM()

Since: QGIS 2.12

Definition at line 889 of file qgswkbtypes.h.

◆ addZ()

static Type QgsWkbTypes::addZ ( Type type )

inlinestatic

Adds the z dimension to a WKB type and returns the new type.

Parameters

type	original type

See also: addM(); dropZ(); hasZ()

Since: QGIS 2.12

Definition at line 864 of file qgswkbtypes.h.

◆ coordDimensions()

static int QgsWkbTypes::coordDimensions ( Type type )

inlinestatic

Returns the coordinate dimension of the geometry type as an integer.

Returned value will be between 2-4, depending on whether the geometry type contains the Z or M dimensions. Invalid geometry types will return a dimension of 0.

See also: wkbDimensions()

Since: QGIS 2.14

Definition at line 650 of file qgswkbtypes.h.

◆ displayString()

QString QgsWkbTypes::displayString ( Type type )

static

Returns a display string type for a WKB type, e.g., the geometry name used in WKT geometry representations.

Definition at line 119 of file qgswkbtypes.cpp.

◆ dropM()

static Type QgsWkbTypes::dropM ( Type type )

inlinestatic

Drops the m dimension (if present) for a WKB type and returns the new type.

Parameters

type	original type

See also: dropZ(); addM()

Since: QGIS 2.14

Definition at line 938 of file qgswkbtypes.h.

◆ dropZ()

static Type QgsWkbTypes::dropZ ( Type type )

inlinestatic

Drops the z dimension (if present) for a WKB type and returns the new type.

Parameters

type	original type

See also: dropM(); addZ()

Since: QGIS 2.14

Definition at line 920 of file qgswkbtypes.h.

◆ flatType()

static Type QgsWkbTypes::flatType ( Type type )

inlinestatic

Returns the flat type for a WKB type.

This is the WKB type minus any Z or M dimensions. For example, for PolygonZM WKB types the single type would be Polygon.

See also: singleType(); multiType()

Definition at line 427 of file qgswkbtypes.h.

◆ geometryDisplayString()

QString QgsWkbTypes::geometryDisplayString ( QgsWkbTypes::GeometryType type )

static

Returns a display string for a geometry type.

This will return one of the following strings:

Point
Line
Polygon
Unknown Geometry
No Geometry
Invalid Geometry

Since: QGIS 3.0

Definition at line 129 of file qgswkbtypes.cpp.

◆ geometryType()

static GeometryType QgsWkbTypes::geometryType ( Type type )

inlinestatic

Returns the geometry type for a WKB type, e.g., both MultiPolygon and CurvePolygon would have a PolygonGeometry geometry type.

GeometryCollections are reported as QgsWkbTypes::UnknownGeometry.

Definition at line 663 of file qgswkbtypes.h.

◆ hasM()

static bool QgsWkbTypes::hasM ( Type type )

inlinestatic

Tests whether a WKB type contains m values.

Returns: true if type has m values

See also: addM(); hasZ()

Definition at line 818 of file qgswkbtypes.h.

◆ hasZ()

static bool QgsWkbTypes::hasZ ( Type type )

inlinestatic

Tests whether a WKB type contains the z-dimension.

Returns: true if type has z values

See also: addZ(); hasM()

Definition at line 768 of file qgswkbtypes.h.

◆ isCurvedType()

static bool QgsWkbTypes::isCurvedType ( Type type )

inlinestatic

Returns true if the WKB type is a curved type or can contain curved geometries.

Since: QGIS 2.14

Definition at line 606 of file qgswkbtypes.h.

◆ isMultiType()

static bool QgsWkbTypes::isMultiType ( Type type )

inlinestatic

Returns true if the WKB type is a multi type.

See also: isSingleType(); multiType()

Definition at line 557 of file qgswkbtypes.h.

◆ isSingleType()

static bool QgsWkbTypes::isSingleType ( Type type )

inlinestatic

Returns true if the WKB type is a single type.

See also: isMultiType(); singleType()

Definition at line 547 of file qgswkbtypes.h.

◆ multiType()

static Type QgsWkbTypes::multiType ( Type type )

inlinestatic

Returns the multi type for a WKB type.

For example, for Polygon WKB types the multi type would be MultiPolygon.

See also: isMultiType(); singleType(); flatType()

Definition at line 296 of file qgswkbtypes.h.

◆ parseType()

QgsWkbTypes::Type QgsWkbTypes::parseType ( const QString & wktStr )

static

Attempts to extract the WKB type from a WKT string.

Parameters

wktStr a valid WKT string

Definition at line 104 of file qgswkbtypes.cpp.

◆ singleType()

static Type QgsWkbTypes::singleType ( Type type )

inlinestatic

Returns the single type for a WKB type.

For example, for MultiPolygon WKB types the single type would be Polygon.

See also: isSingleType(); multiType(); flatType()

Definition at line 152 of file qgswkbtypes.h.

◆ to25D()

static Type QgsWkbTypes::to25D ( Type type )

inlinestatic

Will convert the 25D version of the flat type if supported or Unknown if not supported.

Parameters

type	The type to convert

Returns: the 25D version of the type or Unknown

Definition at line 954 of file qgswkbtypes.h.

◆ wkbDimensions()

static int QgsWkbTypes::wkbDimensions ( Type type )

inlinestatic

Returns the inherent dimension of the geometry type as an integer.

Returned value will always be less than or equal to the coordinate dimension.

Returns: 0 for point geometries, 1 for line geometries, 2 for polygon geometries Invalid geometry types will return a dimension of 0.

See also: coordDimensions()

Definition at line 629 of file qgswkbtypes.h.

◆ zmType()

static Type QgsWkbTypes::zmType	(	Type	type,
		bool	hasZ,
		bool	hasM
	)

inlinestatic

Returns the modified input geometry type according to hasZ / hasM.

Definition at line 526 of file qgswkbtypes.h.

The documentation for this class was generated from the following files:

/tmp/buildd/qgis-3.2.0+99unstable/src/core/geometry/qgswkbtypes.h
/tmp/buildd/qgis-3.2.0+99unstable/src/core/geometry/qgswkbtypes.cpp

Public Types

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ GeometryType

◆ Type

Member Function Documentation

◆ addM()

◆ addZ()

◆ coordDimensions()

◆ displayString()

◆ dropM()

◆ dropZ()

◆ flatType()

◆ geometryDisplayString()

◆ geometryType()

◆ hasM()

◆ hasZ()

◆ isCurvedType()

◆ isMultiType()

◆ isSingleType()

◆ multiType()

◆ parseType()

◆ singleType()

◆ to25D()

◆ wkbDimensions()

◆ zmType()