GDAL
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Abstract base class for 2 dimensional objects like polygons or curve polygons. More...
#include <ogr_geometry.h>
Public Member Functions | |
virtual double | get_Area () const =0 |
Get the area of the surface object. More... | |
virtual OGRErr | PointOnSurface (OGRPoint *poPoint) const |
This method relates to the SFCOM ISurface::get_PointOnSurface() method. More... | |
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OGRGeometry (const OGRGeometry &other) | |
Copy constructor. More... | |
OGRGeometry & | operator= (const OGRGeometry &other) |
Assignment operator. More... | |
bool | operator== (const OGRGeometry &other) const |
Returns if two geometries are equal. | |
bool | operator!= (const OGRGeometry &other) const |
Returns if two geometries are different. | |
virtual int | getDimension () const =0 |
Get the dimension of this object. More... | |
virtual int | getCoordinateDimension () const |
Get the dimension of the coordinates in this object. More... | |
int | CoordinateDimension () const |
Get the dimension of the coordinates in this object. More... | |
virtual OGRBoolean | IsEmpty () const =0 |
Returns TRUE (non-zero) if the object has no points. More... | |
virtual OGRBoolean | IsValid () const |
Test if the geometry is valid. More... | |
virtual OGRGeometry * | MakeValid () const |
Attempts to make an invalid geometry valid without losing vertices. More... | |
virtual OGRBoolean | IsSimple () const |
Test if the geometry is simple. More... | |
OGRBoolean | Is3D () const |
OGRBoolean | IsMeasured () const |
virtual OGRBoolean | IsRing () const |
Test if the geometry is a ring. More... | |
virtual void | empty ()=0 |
Clear geometry information. More... | |
virtual OGRGeometry * | clone () const =0 |
Make a copy of this object. More... | |
virtual void | getEnvelope (OGREnvelope *psEnvelope) const =0 |
Computes and returns the bounding envelope for this geometry in the passed psEnvelope structure. More... | |
virtual void | getEnvelope (OGREnvelope3D *psEnvelope) const =0 |
Computes and returns the bounding envelope (3D) for this geometry in the passed psEnvelope structure. More... | |
virtual int | WkbSize () const =0 |
Returns size of related binary representation. More... | |
OGRErr | importFromWkb (const GByte *, int=-1, OGRwkbVariant=wkbVariantOldOgc) |
Assign geometry from well known binary data. More... | |
virtual OGRErr | importFromWkb (const unsigned char *, int, OGRwkbVariant, int &nBytesConsumedOut)=0 |
Assign geometry from well known binary data. More... | |
virtual OGRErr | exportToWkb (OGRwkbByteOrder, unsigned char *, OGRwkbVariant=wkbVariantOldOgc) const =0 |
Convert a geometry into well known binary format. More... | |
virtual OGRErr | importFromWkt (const char **ppszInput)=0 |
Assign geometry from well known text data. More... | |
OGRErr | importFromWkt (char **ppszInput) |
Deprecated. More... | |
OGRErr | exportToWkt (char **ppszDstText, OGRwkbVariant=wkbVariantOldOgc) const |
Convert a geometry into well known text format. More... | |
virtual std::string | exportToWkt (const OGRWktOptions &opts=OGRWktOptions(), OGRErr *err=nullptr) const =0 |
Export a WKT geometry. More... | |
virtual OGRwkbGeometryType | getGeometryType () const =0 |
Fetch geometry type. More... | |
OGRwkbGeometryType | getIsoGeometryType () const |
Get the geometry type that conforms with ISO SQL/MM Part3. More... | |
virtual const char * | getGeometryName () const =0 |
Fetch WKT name for geometry type. More... | |
virtual void | dumpReadable (FILE *, const char *=nullptr, char **papszOptions=nullptr) const |
Dump geometry in well known text format to indicated output file. More... | |
virtual void | flattenTo2D ()=0 |
Convert geometry to strictly 2D. More... | |
virtual char * | exportToGML (const char *const *papszOptions=nullptr) const |
Convert a geometry into GML format. More... | |
virtual char * | exportToKML () const |
Convert a geometry into KML format. More... | |
virtual char * | exportToJson () const |
Convert a geometry into GeoJSON format. More... | |
virtual void | accept (IOGRGeometryVisitor *visitor)=0 |
Accept a visitor. | |
virtual void | accept (IOGRConstGeometryVisitor *visitor) const =0 |
Accept a visitor. | |
virtual GEOSGeom | exportToGEOS (GEOSContextHandle_t hGEOSCtxt) const |
Returns a GEOSGeom object corresponding to the geometry. More... | |
virtual OGRBoolean | hasCurveGeometry (int bLookForNonLinear=FALSE) const |
Returns if this geometry is or has curve geometry. More... | |
virtual OGRGeometry * | getCurveGeometry (const char *const *papszOptions=nullptr) const |
Return curve version of this geometry. More... | |
virtual OGRGeometry * | getLinearGeometry (double dfMaxAngleStepSizeDegrees=0, const char *const *papszOptions=nullptr) const |
Return, possibly approximate, non-curve version of this geometry. More... | |
virtual void | closeRings () |
Force rings to be closed. More... | |
virtual void | setCoordinateDimension (int nDimension) |
Set the coordinate dimension. More... | |
virtual void | set3D (OGRBoolean bIs3D) |
Add or remove the Z coordinate dimension. More... | |
virtual void | setMeasured (OGRBoolean bIsMeasured) |
Add or remove the M coordinate dimension. More... | |
virtual void | assignSpatialReference (OGRSpatialReference *poSR) |
Assign spatial reference to this object. More... | |
OGRSpatialReference * | getSpatialReference (void) const |
Returns spatial reference system for object. More... | |
virtual OGRErr | transform (OGRCoordinateTransformation *poCT)=0 |
Apply arbitrary coordinate transformation to geometry. More... | |
OGRErr | transformTo (OGRSpatialReference *poSR) |
Transform geometry to new spatial reference system. More... | |
virtual void | segmentize (double dfMaxLength) |
Modify the geometry such it has no segment longer then the given distance. More... | |
virtual OGRBoolean | Intersects (const OGRGeometry *) const |
Do these features intersect? More... | |
virtual OGRBoolean | Equals (const OGRGeometry *) const =0 |
Returns TRUE if two geometries are equivalent. More... | |
virtual OGRBoolean | Disjoint (const OGRGeometry *) const |
Test for disjointness. More... | |
virtual OGRBoolean | Touches (const OGRGeometry *) const |
Test for touching. More... | |
virtual OGRBoolean | Crosses (const OGRGeometry *) const |
Test for crossing. More... | |
virtual OGRBoolean | Within (const OGRGeometry *) const |
Test for containment. More... | |
virtual OGRBoolean | Contains (const OGRGeometry *) const |
Test for containment. More... | |
virtual OGRBoolean | Overlaps (const OGRGeometry *) const |
Test for overlap. More... | |
virtual OGRGeometry * | Boundary () const |
Compute boundary. More... | |
virtual double | Distance (const OGRGeometry *) const |
Compute distance between two geometries. More... | |
virtual OGRGeometry * | ConvexHull () const |
Compute convex hull. More... | |
virtual OGRGeometry * | Buffer (double dfDist, int nQuadSegs=30) const |
Compute buffer of geometry. More... | |
virtual OGRGeometry * | Intersection (const OGRGeometry *) const |
Compute intersection. More... | |
virtual OGRGeometry * | Union (const OGRGeometry *) const |
Compute union. More... | |
virtual OGRGeometry * | UnionCascaded () const |
Compute union using cascading. More... | |
virtual OGRGeometry * | Difference (const OGRGeometry *) const |
Compute difference. More... | |
virtual OGRGeometry * | SymDifference (const OGRGeometry *) const |
Compute symmetric difference. More... | |
virtual OGRErr | Centroid (OGRPoint *poPoint) const |
Compute the geometry centroid. More... | |
virtual OGRGeometry * | Simplify (double dTolerance) const |
Simplify the geometry. More... | |
OGRGeometry * | SimplifyPreserveTopology (double dTolerance) const |
Simplify the geometry while preserving topology. More... | |
virtual OGRGeometry * | DelaunayTriangulation (double dfTolerance, int bOnlyEdges) const |
Return a Delaunay triangulation of the vertices of the geometry. More... | |
virtual OGRGeometry * | Polygonize () const |
Polygonizes a set of sparse edges. More... | |
virtual double | Distance3D (const OGRGeometry *poOtherGeom) const |
Returns the 3D distance between two geometries. More... | |
virtual void | swapXY () |
Swap x and y coordinates. More... | |
OGRPoint * | toPoint () |
Down-cast to OGRPoint*. More... | |
const OGRPoint * | toPoint () const |
Down-cast to OGRPoint*. More... | |
OGRCurve * | toCurve () |
Down-cast to OGRCurve*. More... | |
const OGRCurve * | toCurve () const |
Down-cast to OGRCurve*. More... | |
OGRSimpleCurve * | toSimpleCurve () |
Down-cast to OGRSimpleCurve*. More... | |
const OGRSimpleCurve * | toSimpleCurve () const |
Down-cast to OGRSimpleCurve*. More... | |
OGRLineString * | toLineString () |
Down-cast to OGRLineString*. More... | |
const OGRLineString * | toLineString () const |
Down-cast to OGRLineString*. More... | |
OGRLinearRing * | toLinearRing () |
Down-cast to OGRLinearRing*. More... | |
const OGRLinearRing * | toLinearRing () const |
Down-cast to OGRLinearRing*. More... | |
OGRCircularString * | toCircularString () |
Down-cast to OGRCircularString*. More... | |
const OGRCircularString * | toCircularString () const |
Down-cast to OGRCircularString*. More... | |
OGRCompoundCurve * | toCompoundCurve () |
Down-cast to OGRCompoundCurve*. More... | |
const OGRCompoundCurve * | toCompoundCurve () const |
Down-cast to OGRCompoundCurve*. More... | |
OGRSurface * | toSurface () |
Down-cast to OGRSurface*. More... | |
const OGRSurface * | toSurface () const |
Down-cast to OGRSurface*. More... | |
OGRPolygon * | toPolygon () |
Down-cast to OGRPolygon*. More... | |
const OGRPolygon * | toPolygon () const |
Down-cast to OGRPolygon*. More... | |
OGRTriangle * | toTriangle () |
Down-cast to OGRTriangle*. More... | |
const OGRTriangle * | toTriangle () const |
Down-cast to OGRTriangle*. More... | |
OGRCurvePolygon * | toCurvePolygon () |
Down-cast to OGRCurvePolygon*. More... | |
const OGRCurvePolygon * | toCurvePolygon () const |
Down-cast to OGRCurvePolygon*. More... | |
OGRGeometryCollection * | toGeometryCollection () |
Down-cast to OGRGeometryCollection*. More... | |
const OGRGeometryCollection * | toGeometryCollection () const |
Down-cast to OGRGeometryCollection*. More... | |
OGRMultiPoint * | toMultiPoint () |
Down-cast to OGRMultiPoint*. More... | |
const OGRMultiPoint * | toMultiPoint () const |
Down-cast to OGRMultiPoint*. More... | |
OGRMultiLineString * | toMultiLineString () |
Down-cast to OGRMultiLineString*. More... | |
const OGRMultiLineString * | toMultiLineString () const |
Down-cast to OGRMultiLineString*. More... | |
OGRMultiPolygon * | toMultiPolygon () |
Down-cast to OGRMultiPolygon*. More... | |
const OGRMultiPolygon * | toMultiPolygon () const |
Down-cast to OGRMultiPolygon*. More... | |
OGRMultiCurve * | toMultiCurve () |
Down-cast to OGRMultiCurve*. More... | |
const OGRMultiCurve * | toMultiCurve () const |
Down-cast to OGRMultiCurve*. More... | |
OGRMultiSurface * | toMultiSurface () |
Down-cast to OGRMultiSurface*. More... | |
const OGRMultiSurface * | toMultiSurface () const |
Down-cast to OGRMultiSurface*. More... | |
OGRPolyhedralSurface * | toPolyhedralSurface () |
Down-cast to OGRPolyhedralSurface*. More... | |
const OGRPolyhedralSurface * | toPolyhedralSurface () const |
Down-cast to OGRPolyhedralSurface*. More... | |
OGRTriangulatedSurface * | toTriangulatedSurface () |
Down-cast to OGRTriangulatedSurface*. More... | |
const OGRTriangulatedSurface * | toTriangulatedSurface () const |
Down-cast to OGRTriangulatedSurface*. More... | |
Additional Inherited Members | |
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static GEOSContextHandle_t | createGEOSContext () |
Create a new GEOS context. More... | |
static void | freeGEOSContext (GEOSContextHandle_t hGEOSCtxt) |
Destroy a GEOS context. More... | |
static OGRGeometryH | ToHandle (OGRGeometry *poGeom) |
Convert a OGRGeometry* to a OGRGeometryH. More... | |
static OGRGeometry * | FromHandle (OGRGeometryH hGeom) |
Convert a OGRGeometryH to a OGRGeometry*. More... | |
Abstract base class for 2 dimensional objects like polygons or curve polygons.
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pure virtual |
Get the area of the surface object.
For polygons the area is computed as the area of the outer ring less the area of all internal rings.
This method relates to the SFCOM ISurface::get_Area() method.
Implemented in OGRPolyhedralSurface, and OGRCurvePolygon.
This method relates to the SFCOM ISurface::get_PointOnSurface() method.
NOTE: Only implemented when GEOS included in build.
poPoint | point to be set with an internal point. |
Reimplemented in OGRPolyhedralSurface.