OGR
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#include <ogr_geometry.h>
Public Member Functions | |
OGRGeometry (const OGRGeometry &other) | |
Copy constructor. More... | |
OGRGeometry & | operator= (const OGRGeometry &other) |
Assignment operator. More... | |
bool | operator== (const OGRGeometry &other) const |
bool | operator!= (const OGRGeometry &other) const |
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 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. This restores the geometry to its initial state after construction, and before assignment of actual geometry. More... | |
virtual OGRGeometry * | clone () const CPL_WARN_UNUSED_RESULT=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) CPL_WARN_DEPRECATED("Use importFromWkt( const char**) instead") |
virtual OGRErr | exportToWkt (char **ppszDstText, OGRwkbVariant=wkbVariantOldOgc) const =0 |
Convert a geometry into well known text format. 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. In a sense this converts all Z coordinates to 0.0. 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 |
virtual void | accept (IOGRConstGeometryVisitor *visitor) const =0 |
virtual GEOSGeom | exportToGEOS (GEOSContextHandle_t hGEOSCtxt) const CPL_WARN_UNUSED_RESULT |
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 CPL_WARN_UNUSED_RESULT |
Return curve version of this geometry. More... | |
virtual OGRGeometry * | getLinearGeometry (double dfMaxAngleStepSizeDegrees=0, const char *const *papszOptions=nullptr) const CPL_WARN_UNUSED_RESULT |
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 CPL_WARN_UNUSED_RESULT |
Compute boundary. More... | |
virtual double | Distance (const OGRGeometry *) const |
Compute distance between two geometries. More... | |
virtual OGRGeometry * | ConvexHull () const CPL_WARN_UNUSED_RESULT |
Compute convex hull. More... | |
virtual OGRGeometry * | Buffer (double dfDist, int nQuadSegs=30) const CPL_WARN_UNUSED_RESULT |
Compute buffer of geometry. More... | |
virtual OGRGeometry * | Intersection (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT |
Compute intersection. More... | |
virtual OGRGeometry * | Union (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT |
Compute union. More... | |
virtual OGRGeometry * | UnionCascaded () const CPL_WARN_UNUSED_RESULT |
Compute union using cascading. More... | |
virtual OGRGeometry * | Difference (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT |
Compute difference. More... | |
virtual OGRGeometry * | SymDifference (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT |
Compute symmetric difference. More... | |
virtual OGRErr | Centroid (OGRPoint *poPoint) const |
Compute the geometry centroid. More... | |
virtual OGRGeometry * | Simplify (double dTolerance) const CPL_WARN_UNUSED_RESULT |
Simplify the geometry. More... | |
OGRGeometry * | SimplifyPreserveTopology (double dTolerance) const CPL_WARN_UNUSED_RESULT |
Simplify the geometry while preserving topology. More... | |
virtual OGRGeometry * | DelaunayTriangulation (double dfTolerance, int bOnlyEdges) const CPL_WARN_UNUSED_RESULT |
Return a Delaunay triangulation of the vertices of the geometry. More... | |
virtual OGRGeometry * | Polygonize () const CPL_WARN_UNUSED_RESULT |
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 () |
const OGRPoint * | toPoint () const |
OGRCurve * | toCurve () |
const OGRCurve * | toCurve () const |
OGRSimpleCurve * | toSimpleCurve () |
const OGRSimpleCurve * | toSimpleCurve () const |
OGRLineString * | toLineString () |
const OGRLineString * | toLineString () const |
OGRLinearRing * | toLinearRing () |
const OGRLinearRing * | toLinearRing () const |
OGRCircularString * | toCircularString () |
const OGRCircularString * | toCircularString () const |
OGRCompoundCurve * | toCompoundCurve () |
const OGRCompoundCurve * | toCompoundCurve () const |
OGRSurface * | toSurface () |
const OGRSurface * | toSurface () const |
OGRPolygon * | toPolygon () |
const OGRPolygon * | toPolygon () const |
OGRTriangle * | toTriangle () |
const OGRTriangle * | toTriangle () const |
OGRCurvePolygon * | toCurvePolygon () |
const OGRCurvePolygon * | toCurvePolygon () const |
OGRGeometryCollection * | toGeometryCollection () |
const OGRGeometryCollection * | toGeometryCollection () const |
OGRMultiPoint * | toMultiPoint () |
const OGRMultiPoint * | toMultiPoint () const |
OGRMultiLineString * | toMultiLineString () |
const OGRMultiLineString * | toMultiLineString () const |
OGRMultiPolygon * | toMultiPolygon () |
const OGRMultiPolygon * | toMultiPolygon () const |
OGRMultiCurve * | toMultiCurve () |
const OGRMultiCurve * | toMultiCurve () const |
OGRMultiSurface * | toMultiSurface () |
const OGRMultiSurface * | toMultiSurface () const |
OGRPolyhedralSurface * | toPolyhedralSurface () |
const OGRPolyhedralSurface * | toPolyhedralSurface () const |
OGRTriangulatedSurface * | toTriangulatedSurface () |
const OGRTriangulatedSurface * | toTriangulatedSurface () const |
Static Public Member Functions | |
static GEOSContextHandle_t | createGEOSContext () |
static void | freeGEOSContext (GEOSContextHandle_t hGEOSCtxt) |
static OGRGeometryH | ToHandle (OGRGeometry *poGeom) |
static OGRGeometry * | FromHandle (OGRGeometryH hGeom) |
Abstract base class for all geometry classes.
Some spatial analysis methods require that OGR is built on the GEOS library to work properly. The precise meaning of methods that describe spatial relationships between geometries is described in the SFCOM, or other simple features interface specifications, like "OpenGIS® Implementation Specification for Geographic information - Simple feature access - Part 1: Common architecture": <a href="http://www.opengeospatial.org/standards/sfa">OGC 06-103r4
In GDAL 2.0, the hierarchy of classes has been extended with (working draft) ISO SQL/MM Part 3 (ISO/IEC 13249-3) curve geometries : CIRCULARSTRING (OGRCircularString), COMPOUNDCURVE (OGRCompoundCurve), CURVEPOLYGON (OGRCurvePolygon), MULTICURVE (OGRMultiCurve) and MULTISURFACE (OGRMultiSurface).
OGRGeometry::OGRGeometry | ( | const OGRGeometry & | other | ) |
Copy constructor.
Note: before GDAL 2.1, only the default implementation of the constructor existed, which could be unsafe to use.
References OGRSpatialReference::Reference().
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Accept a visitor.
Implemented in OGRMultiLineString, OGRMultiCurve, OGRMultiPoint, OGRTriangulatedSurface, OGRPolyhedralSurface, OGRMultiPolygon, OGRMultiSurface, OGRGeometryCollection, OGRTriangle, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRLinearRing, OGRLineString, and OGRPoint.
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Accept a visitor.
Implemented in OGRMultiLineString, OGRMultiCurve, OGRMultiPoint, OGRTriangulatedSurface, OGRPolyhedralSurface, OGRMultiPolygon, OGRMultiSurface, OGRGeometryCollection, OGRTriangle, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRLinearRing, OGRLineString, and OGRPoint.
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Assign spatial reference to this object.
Any existing spatial reference is replaced, but under no circumstances does this result in the object being reprojected. It is just changing the interpretation of the existing geometry. Note that assigning a spatial reference increments the reference count on the OGRSpatialReference, but does not copy it.
Starting with GDAL 2.3, this will also assign the spatial reference to potential sub-geometries of the geometry (OGRGeometryCollection, OGRCurvePolygon/OGRPolygon, OGRCompoundCurve, OGRPolyhedralSurface and their derived classes).
This is similar to the SFCOM IGeometry::put_SpatialReference() method.
This method is the same as the C function OGR_G_AssignSpatialReference().
poSR | new spatial reference system to apply. |
Reimplemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, and OGRCompoundCurve.
References OGRSpatialReference::Reference(), and OGRSpatialReference::Release().
Referenced by OGRGeometryCollection::assignSpatialReference(), OGRPolyhedralSurface::assignSpatialReference(), OGRPoint::clone(), OGRSimpleCurve::clone(), OGRLinearRing::clone(), OGRGeometryFactory::createFromWkb(), OGRGeometryFactory::createFromWkt(), OGRGeometryFactory::curveFromLineString(), OGRCircularString::CurveToLine(), OGRGeometryFactory::forceTo(), OGRGeometryFactory::forceToLineString(), OGRSimpleCurve::getSubLine(), operator=(), and OGRPoint::transform().
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Compute boundary.
A new geometry object is created and returned containing the boundary of the geometry on which the method is invoked.
This method is the same as the C function OGR_G_Boundary().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
References CPLError().
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Compute buffer of geometry.
Builds a new geometry containing the buffer region around the geometry on which it is invoked. The buffer is a polygon containing the region within the buffer distance of the original geometry.
Some buffer sections are properly described as curves, but are converted to approximate polygons. The nQuadSegs parameter can be used to control how many segments should be used to define a 90 degree curve - a quadrant of a circle. A value of 30 is a reasonable default. Large values result in large numbers of vertices in the resulting buffer geometry while small numbers reduce the accuracy of the result.
This method is the same as the C function OGR_G_Buffer().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
dfDist | the buffer distance to be applied. Should be expressed into the same unit as the coordinates of the geometry. |
nQuadSegs | the number of segments used to approximate a 90 degree (quadrant) of curvature. |
References CPLError().
Compute the geometry centroid.
The centroid location is applied to the passed in OGRPoint object. The centroid is not necessarily within the geometry.
This method relates to the SFCOM ISurface::get_Centroid() method however the current implementation based on GEOS can operate on other geometry types such as multipoint, linestring, geometrycollection such as multipolygons. OGC SF SQL 1.1 defines the operation for surfaces (polygons). SQL/MM-Part 3 defines the operation for surfaces and multisurfaces (multipolygons).
This function is the same as the C function OGR_G_Centroid().
This function is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this function will always fail, issuing a CPLE_NotSupported error.
< Failure
< Failure
References CPLError(), and OGRERR_FAILURE.
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Make a copy of this object.
This method relates to the SFCOM IGeometry::clone() method.
This method is the same as the C function OGR_G_Clone().
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRLinearRing, OGRSimpleCurve, and OGRPoint.
Referenced by OGRCompoundCurve::addCurve(), OGRGeometryCollection::addGeometry(), OGRPolyhedralSurface::addGeometry(), OGRCurvePolygon::addRing(), OGRFeature::CopySelfTo(), OGRGeometryFactory::forceToPolygon(), getCurveGeometry(), OGRLayer::GetFeature(), getLinearGeometry(), OGRFeature::SetGeomField(), and OGRGeometryFactory::transformWithOptions().
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Force rings to be closed.
If this geometry, or any contained geometries has polygon rings that are not closed, they will be closed by adding the starting point at the end.
Reimplemented in OGRGeometryCollection, OGRPolygon, and OGRLinearRing.
Referenced by OGRGeometryCollection::closeRings(), and OGR_G_CloseRings().
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Test for containment.
Tests if actual geometry object contains the passed geometry.
This method is the same as the C function OGR_G_Contains().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the geometry to compare to this geometry. |
Reimplemented in OGRCurvePolygon.
References CPLError().
Referenced by OGRCurvePolygon::Contains().
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Compute convex hull.
A new geometry object is created and returned containing the convex hull of the geometry on which the method is invoked.
This method is the same as the C function OGR_G_ConvexHull().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
References CPLError().
int OGRGeometry::CoordinateDimension | ( | ) | const |
Get the dimension of the coordinates in this object.
This method is the same as the C function OGR_G_CoordinateDimension().
Referenced by OGRSimpleCurve::exportToWkb(), OGRSimpleCurve::importFromWkb(), OGR_G_CoordinateDimension(), and OGRSimpleCurve::WkbSize().
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Create a new GEOS context.
References CPLError().
Referenced by Intersects().
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Test for crossing.
Tests if this geometry and the other passed into the method are crossing.
This method is the same as the C function OGR_G_Crosses().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the geometry to compare to this geometry. |
References CPLError().
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Return a Delaunay triangulation of the vertices of the geometry.
This function is the same as the C function OGR_G_DelaunayTriangulation().
This function is built on the GEOS library, v3.4 or above. If OGR is built without the GEOS library, this function will always fail, issuing a CPLE_NotSupported error.
dfTolerance | optional snapping tolerance to use for improved robustness |
bOnlyEdges | if TRUE, will return a MULTILINESTRING, otherwise it will return a GEOMETRYCOLLECTION containing triangular POLYGONs. |
References CPLError().
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Compute difference.
Generates a new geometry which is the region of this geometry with the region of the second geometry removed.
This method is the same as the C function OGR_G_Difference().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the other geometry removed from "this" geometry. |
References CPLError().
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Test for disjointness.
Tests if this geometry and the other passed into the method are disjoint.
This method is the same as the C function OGR_G_Disjoint().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the geometry to compare to this geometry. |
References CPLError().
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Compute distance between two geometries.
Returns the shortest distance between the two geometries. The distance is expressed into the same unit as the coordinates of the geometries.
This method is the same as the C function OGR_G_Distance().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the other geometry to compare against. |
References CPLDebug(), and CPLError().
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Returns the 3D distance between two geometries.
The distance is expressed into the same unit as the coordinates of the geometries.
This method is built on the SFCGAL library, check it for the definition of the geometry operation. If OGR is built without the SFCGAL library, this method will always return -1.0
This function is the same as the C function OGR_G_Distance3D().
References CPLDebug(), CPLError(), and Is3D().
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Dump geometry in well known text format to indicated output file.
A few options can be defined to change the default dump :
This method is the same as the C function OGR_G_DumpReadable().
fp | the text file to write the geometry to. |
pszPrefix | the prefix to put on each line of output. |
papszOptions | NULL terminated list of options (may be NULL) |
< Success
< Success
References CPLFree, CPLTestBool(), CSLFetchNameValue(), dumpReadable(), EQUAL, exportToWkt(), OGRCompoundCurve::getCurve(), OGRCurvePolygon::getExteriorRingCurve(), getGeometryName(), getGeometryType(), OGRCurvePolygon::getInteriorRingCurve(), OGRCompoundCurve::getNumCurves(), OGRGeometryCollection::getNumGeometries(), OGRPolyhedralSurface::getNumGeometries(), OGRCurvePolygon::getNumInteriorRings(), OGRCurve::getNumPoints(), OGRSimpleCurve::getNumPoints(), OGRERR_NONE, toCompoundCurve(), toCurvePolygon(), toGeometryCollection(), toPolyhedralSurface(), toSimpleCurve(), wkbCircularString, wkbCircularStringM, wkbCircularStringZ, wkbCircularStringZM, wkbCompoundCurve, wkbCompoundCurveM, wkbCompoundCurveZ, wkbCompoundCurveZM, wkbCurve, wkbCurveM, wkbCurvePolygon, wkbCurvePolygonM, wkbCurvePolygonZ, wkbCurvePolygonZM, wkbCurveZ, wkbCurveZM, wkbFlatten, wkbGeometryCollection, wkbGeometryCollection25D, wkbGeometryCollectionM, wkbGeometryCollectionZM, wkbLinearRing, wkbLineString, wkbLineString25D, wkbLineStringM, wkbLineStringZM, wkbMultiCurve, wkbMultiCurveM, wkbMultiCurveZ, wkbMultiCurveZM, wkbMultiLineString, wkbMultiLineString25D, wkbMultiLineStringM, wkbMultiLineStringZM, wkbMultiPoint, wkbMultiPoint25D, wkbMultiPointM, wkbMultiPointZM, wkbMultiPolygon, wkbMultiPolygon25D, wkbMultiPolygonM, wkbMultiPolygonZM, wkbMultiSurface, wkbMultiSurfaceM, wkbMultiSurfaceZ, wkbMultiSurfaceZM, wkbNone, wkbPoint, wkbPoint25D, wkbPointM, wkbPointZM, wkbPolygon, wkbPolygon25D, wkbPolygonM, wkbPolygonZM, wkbPolyhedralSurface, wkbPolyhedralSurfaceM, wkbPolyhedralSurfaceZ, wkbPolyhedralSurfaceZM, wkbSurface, wkbSurfaceM, wkbSurfaceZ, wkbSurfaceZM, wkbTIN, wkbTINM, wkbTINZ, wkbTINZM, wkbTriangle, wkbTriangleM, wkbTriangleZ, wkbTriangleZM, wkbUnknown, and wkbVariantIso.
Referenced by dumpReadable(), OGRFeature::DumpReadable(), and OGR_G_DumpReadable().
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Clear geometry information. This restores the geometry to its initial state after construction, and before assignment of actual geometry.
This method relates to the SFCOM IGeometry::Empty() method.
This method is the same as the C function OGR_G_Empty().
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRSimpleCurve, and OGRPoint.
Referenced by OGR_G_Empty().
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Returns TRUE if two geometries are equivalent.
This operation implements the SQL/MM ST_OrderingEquals() operation.
The comparison is done in a structural way, that is to say that the geometry types must be identical, as well as the number and ordering of sub-geometries and vertices. Or equivalently, two geometries are considered equal by this method if their WKT/WKB representation is equal. Note: this must be distinguished for equality in a spatial way (which is the purpose of the ST_Equals() operation).
This method is the same as the C function OGR_G_Equals().
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRSimpleCurve, and OGRPoint.
Referenced by OGRFeature::Equal(), and OGRGeometryCollection::Equals().
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Returns a GEOSGeom object corresponding to the geometry.
hGEOSCtxt | GEOS context |
References CPLError().
Referenced by Intersects().
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Convert a geometry into GML format.
The GML geometry is expressed directly in terms of GML basic data types assuming the this is available in the gml namespace. The returned string should be freed with CPLFree() when no longer required.
The supported options in OGR 1.8.0 are :
This method is the same as the C function OGR_G_ExportToGMLEx().
papszOptions | NULL-terminated list of options. |
References OGR_G_ExportToGMLEx(), and ToHandle().
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Convert a geometry into GeoJSON format.
The returned string should be freed with CPLFree() when no longer required.
This method is the same as the C function OGR_G_ExportToJson().
References OGR_G_ExportToJson(), and ToHandle().
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Convert a geometry into KML format.
The returned string should be freed with CPLFree() when no longer required.
This method is the same as the C function OGR_G_ExportToKML().
References OGR_G_ExportToKML(), and ToHandle().
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Convert a geometry into well known binary format.
This method relates to the SFCOM IWks::ExportToWKB() method.
This method is the same as the C function OGR_G_ExportToWkb() or OGR_G_ExportToIsoWkb(), depending on the value of eWkbVariant.
eByteOrder | One of wkbXDR or wkbNDR indicating MSB or LSB byte order respectively. |
pabyData | a buffer into which the binary representation is written. This buffer must be at least OGRGeometry::WkbSize() byte in size. |
eWkbVariant | What standard to use when exporting geometries with three dimensions (or more). The default wkbVariantOldOgc is the historical OGR variant. wkbVariantIso is the variant defined in ISO SQL/MM and adopted by OGC for SFSQL 1.2. |
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRLinearRing, OGRSimpleCurve, and OGRPoint.
Referenced by OGRGeometryCollection::exportToWkb().
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Convert a geometry into well known text format.
This method relates to the SFCOM IWks::ExportToWKT() method.
This method is the same as the C function OGR_G_ExportToWkt().
ppszDstText | a text buffer is allocated by the program, and assigned to the passed pointer. After use, *ppszDstText should be freed with CPLFree(). |
eWkbVariant | the specification that must be conformed too :
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Implemented in OGRMultiLineString, OGRMultiCurve, OGRMultiPoint, OGRPolyhedralSurface, OGRMultiPolygon, OGRMultiSurface, OGRGeometryCollection, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRSimpleCurve, and OGRPoint.
Referenced by dumpReadable(), and OGR_G_ExportToWkt().
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Convert geometry to strictly 2D. In a sense this converts all Z coordinates to 0.0.
This method is the same as the C function OGR_G_FlattenTo2D().
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRSimpleCurve, and OGRPoint.
Referenced by OGR_G_FlattenTo2D().
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inlinestatic |
Convert a OGRGeometryH to a OGRGeometry*.
Referenced by OGRGeometryFactory::createFromGML(), OGR_DS_ExecuteSQL(), OGR_F_SetGeometry(), OGR_F_SetGeometryDirectly(), OGR_F_SetGeomField(), OGR_F_SetGeomFieldDirectly(), OGR_G_AssignSpatialReference(), OGR_G_Boundary(), OGR_G_Buffer(), OGR_G_Centroid(), OGR_G_Clone(), OGR_G_CloseRings(), OGR_G_Contains(), OGR_G_ConvexHull(), OGR_G_CoordinateDimension(), OGR_G_Crosses(), OGR_G_DelaunayTriangulation(), OGR_G_Difference(), OGR_G_Disjoint(), OGR_G_Distance(), OGR_G_Distance3D(), OGR_G_DumpReadable(), OGR_G_Empty(), OGR_G_ExportToIsoWkb(), OGR_G_ExportToIsoWkt(), OGR_G_ExportToWkb(), OGR_G_ExportToWkt(), OGR_G_FlattenTo2D(), OGR_G_GetCoordinateDimension(), OGR_G_GetDimension(), OGR_G_GetEnvelope(), OGR_G_GetEnvelope3D(), OGR_G_GetGeometryName(), OGR_G_GetGeometryType(), OGR_G_GetSpatialReference(), OGR_G_ImportFromWkb(), OGR_G_ImportFromWkt(), OGR_G_Intersection(), OGR_G_Intersects(), OGR_G_Is3D(), OGR_G_IsEmpty(), OGR_G_IsMeasured(), OGR_G_IsRing(), OGR_G_IsSimple(), OGR_G_IsValid(), OGR_G_Overlaps(), OGR_G_Polygonize(), OGR_G_Set3D(), OGR_G_SetCoordinateDimension(), OGR_G_SetMeasured(), OGR_G_Simplify(), OGR_G_SimplifyPreserveTopology(), OGR_G_SwapXY(), OGR_G_SymDifference(), OGR_G_Touches(), OGR_G_Transform(), OGR_G_TransformTo(), OGR_G_Union(), OGR_G_UnionCascaded(), OGR_G_Within(), OGR_G_WkbSize(), OGR_L_SetSpatialFilter(), and OGR_L_SetSpatialFilterEx().
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virtual |
Get the dimension of the coordinates in this object.
This method is the same as the C function OGR_G_GetCoordinateDimension().
Referenced by OGRCurvePolygon::CastToPolygon(), OGRCircularString::CurveToLine(), OGRGeometryCollection::exportToWkb(), OGRSimpleCurve::getSubLine(), OGR_G_GetCoordinateDimension(), OGRSimpleCurve::setPoints(), OGRSimpleCurve::setZ(), OGRSimpleCurve::Value(), and OGRCircularString::Value().
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Return curve version of this geometry.
Returns a geometry that has possibly CIRCULARSTRING, COMPOUNDCURVE, CURVEPOLYGON, MULTICURVE or MULTISURFACE in it, by de-approximating curve geometries.
If the geometry has no curve portion, the returned geometry will be a clone of it.
The ownership of the returned geometry belongs to the caller.
The reverse method is OGRGeometry::getLinearGeometry().
This function is the same as C function OGR_G_GetCurveGeometry().
papszOptions | options as a null-terminated list of strings. Unused for now. Must be set to NULL. |
Reimplemented in OGRGeometryCollection, OGRPolygon, and OGRLineString.
References clone().
Referenced by OGRGeometryCollection::getCurveGeometry().
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pure virtual |
Get the dimension of this object.
This method corresponds to the SFCOM IGeometry::GetDimension() method. It indicates the dimension of the object, but does not indicate the dimension of the underlying space (as indicated by OGRGeometry::getCoordinateDimension()).
This method is the same as the C function OGR_G_GetDimension().
Implemented in OGRMultiCurve, OGRMultiPoint, OGRPolyhedralSurface, OGRMultiSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCurve, and OGRPoint.
Referenced by OGR_G_GetDimension().
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pure virtual |
Computes and returns the bounding envelope for this geometry in the passed psEnvelope structure.
This method is the same as the C function OGR_G_GetEnvelope().
psEnvelope | the structure in which to place the results. |
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRSimpleCurve, and OGRPoint.
Referenced by OGRGeometryCollection::getEnvelope(), Intersects(), OGR_G_GetEnvelope(), OGR_G_GetEnvelope3D(), and OGRGeometryFactory::transformWithOptions().
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pure virtual |
Computes and returns the bounding envelope (3D) for this geometry in the passed psEnvelope structure.
This method is the same as the C function OGR_G_GetEnvelope3D().
psEnvelope | the structure in which to place the results. |
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRSimpleCurve, and OGRPoint.
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pure virtual |
Fetch WKT name for geometry type.
There is no SFCOM analog to this method.
This method is the same as the C function OGR_G_GetGeometryName().
Implemented in OGRMultiLineString, OGRMultiCurve, OGRMultiPoint, OGRTriangulatedSurface, OGRPolyhedralSurface, OGRMultiPolygon, OGRMultiSurface, OGRGeometryCollection, OGRTriangle, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRLinearRing, OGRLineString, and OGRPoint.
Referenced by OGRTriangulatedSurface::addGeometry(), dumpReadable(), OGRSimpleCurve::exportToWkt(), OGRFeature::GetFieldAsString(), and OGR_G_GetGeometryName().
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pure virtual |
Fetch geometry type.
Note that the geometry type may include the 2.5D flag. To get a 2D flattened version of the geometry type apply the wkbFlatten() macro to the return result.
This method is the same as the C function OGR_G_GetGeometryType().
Implemented in OGRMultiLineString, OGRMultiCurve, OGRMultiPoint, OGRTriangulatedSurface, OGRPolyhedralSurface, OGRMultiPolygon, OGRMultiSurface, OGRGeometryCollection, OGRTriangle, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRLineString, and OGRPoint.
Referenced by OGRPolyhedralSurface::addGeometry(), OGRGeometryCollection::addGeometryDirectly(), OGRPolyhedralSurface::addGeometryDirectly(), OGRCurve::CastToCompoundCurve(), OGRSimpleCurve::clone(), OGRGeometryCollection::closeRings(), OGRCurvePolygon::Contains(), dumpReadable(), OGRPoint::Equals(), OGRSimpleCurve::Equals(), OGRCompoundCurve::Equals(), OGRCurvePolygon::Equals(), OGRGeometryCollection::Equals(), OGRPolyhedralSurface::Equals(), OGRSimpleCurve::exportToWkb(), OGRGeometryFactory::forceTo(), OGRGeometryFactory::forceToLineString(), OGRGeometryFactory::forceToMultiLineString(), OGRGeometryFactory::forceToMultiPoint(), OGRGeometryFactory::forceToMultiPolygon(), OGRGeometryFactory::forceToPolygon(), OGRGeometryCollection::get_Area(), OGRGeometryCollection::get_Length(), getIsoGeometryType(), OGRPoint::Intersects(), OGRCurvePolygon::Intersects(), OGR_F_GetGeometryRef(), OGR_F_GetGeomFieldRef(), OGR_G_Centroid(), OGR_G_GetGeometryType(), OGRGeometryFactory::transformWithOptions(), and OGRPoint::Within().
OGRwkbGeometryType OGRGeometry::getIsoGeometryType | ( | ) | const |
Get the geometry type that conforms with ISO SQL/MM Part3.
References getGeometryType(), and wkbFlatten.
Referenced by OGRPoint::exportToWkb(), OGRSimpleCurve::exportToWkb(), OGRPolygon::exportToWkb(), OGRGeometryCollection::exportToWkb(), and OGRPolyhedralSurface::exportToWkb().
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virtual |
Return, possibly approximate, non-curve version of this geometry.
Returns a geometry that has no CIRCULARSTRING, COMPOUNDCURVE, CURVEPOLYGON, MULTICURVE or MULTISURFACE in it, by approximating curve geometries.
The ownership of the returned geometry belongs to the caller.
The reverse method is OGRGeometry::getCurveGeometry().
This method is the same as the C function OGR_G_GetLinearGeometry().
dfMaxAngleStepSizeDegrees | the largest step in degrees along the arc, zero to use the default setting. |
papszOptions | options as a null-terminated list of strings. See OGRGeometryFactory::curveToLineString() for valid options. |
Reimplemented in OGRGeometryCollection, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, and OGRCircularString.
References clone().
Referenced by OGRGeometryFactory::createFromWkb(), OGRGeometryFactory::createFromWkt(), OGRGeometryFactory::forceToMultiLineString(), OGRPolygon::getLinearGeometry(), and OGRGeometryCollection::getLinearGeometry().
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inline |
Returns spatial reference system for object.
This method relates to the SFCOM IGeometry::get_SpatialReference() method.
This method is the same as the C function OGR_G_GetSpatialReference().
Referenced by OGRCurve::CastToCompoundCurve(), OGRCurvePolygon::CastToPolygon(), OGRTriangulatedSurface::CastToPolyhedralSurface(), OGRPoint::clone(), OGRSimpleCurve::clone(), OGRLinearRing::clone(), OGRCompoundCurve::clone(), OGRCurvePolygon::clone(), OGRGeometryCollection::clone(), OGRPolyhedralSurface::clone(), OGRGeometryFactory::curveFromLineString(), OGRCurvePolygon::CurvePolyToPoly(), OGRCircularString::CurveToLine(), OGRGeometryFactory::forceTo(), OGRGeometryFactory::forceToLineString(), OGRGeometryFactory::forceToMultiLineString(), OGRGeometryFactory::forceToMultiPoint(), OGRGeometryFactory::forceToMultiPolygon(), OGRGeometryFactory::forceToPolygon(), OGRPolygon::getCurveGeometry(), OGRGeometryCollection::getCurveGeometry(), OGRGeometryCollection::getLinearGeometry(), OGRSimpleCurve::getSubLine(), operator=(), OGRTriangulatedSurface::operator=(), and transformTo().
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virtual |
Returns if this geometry is or has curve geometry.
Returns if a geometry is, contains or may contain a CIRCULARSTRING, COMPOUNDCURVE, CURVEPOLYGON, MULTICURVE or MULTISURFACE.
If bLookForNonLinear is set to TRUE, it will be actually looked if the geometry or its subgeometries are or contain a non-linear geometry in them. In which case, if the method returns TRUE, it means that getLinearGeometry() would return an approximate version of the geometry. Otherwise, getLinearGeometry() would do a conversion, but with just converting container type, like COMPOUNDCURVE -> LINESTRING, MULTICURVE -> MULTILINESTRING or MULTISURFACE -> MULTIPOLYGON, resulting in a "loss-less" conversion.
This method is the same as the C function OGR_G_HasCurveGeometry().
bLookForNonLinear | set it to TRUE to check if the geometry is or contains a CIRCULARSTRING. |
Reimplemented in OGRMultiLineString, OGRMultiCurve, OGRMultiPoint, OGRPolyhedralSurface, OGRMultiPolygon, OGRMultiSurface, OGRGeometryCollection, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, and OGRCircularString.
Referenced by OGRGeometryFactory::createFromWkb(), OGRGeometryFactory::createFromWkt(), OGRGeometryFactory::forceToLineString(), OGRGeometryFactory::forceToMultiLineString(), OGRGeometryFactory::forceToMultiPolygon(), OGRGeometryFactory::forceToPolygon(), and OGRGeometryCollection::getCurveGeometry().
OGRErr OGRGeometry::importFromWkb | ( | const GByte * | pabyData, |
int | nSize = -1 , |
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OGRwkbVariant | eWkbVariant = wkbVariantOldOgc |
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) |
Assign geometry from well known binary data.
The object must have already been instantiated as the correct derived type of geometry object to match the binaries type. This method is used by the OGRGeometryFactory class, but not normally called by application code.
This method relates to the SFCOM IWks::ImportFromWKB() method.
This method is the same as the C function OGR_G_ImportFromWkb().
pabyData | the binary input data. |
nSize | the size of pabyData in bytes, or -1 if not known. |
eWkbVariant | if wkbVariantPostGIS1, special interpretation is done for curve geometries code |
Referenced by OGRGeometryFactory::createFromWkb().
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pure virtual |
Assign geometry from well known binary data.
The object must have already been instantiated as the correct derived type of geometry object to match the binaries type. This method is used by the OGRGeometryFactory class, but not normally called by application code.
This method relates to the SFCOM IWks::ImportFromWKB() method.
This method is the same as the C function OGR_G_ImportFromWkb().
pabyData | the binary input data. |
nSize | the size of pabyData in bytes, or -1 if not known. |
eWkbVariant | if wkbVariantPostGIS1, special interpretation is done for curve geometries code |
nBytesConsumedOut | output parameter. Number of bytes consumed. |
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRTriangle, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRLinearRing, OGRSimpleCurve, and OGRPoint.
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pure virtual |
Assign geometry from well known text data.
The object must have already been instantiated as the correct derived type of geometry object to match the text type. This method is used by the OGRGeometryFactory class, but not normally called by application code.
This method relates to the SFCOM IWks::ImportFromWKT() method.
This method is the same as the C function OGR_G_ImportFromWkt().
ppszInput | pointer to a pointer to the source text. The pointer is updated to pointer after the consumed text. |
Implemented in OGRMultiCurve, OGRMultiPoint, OGRPolyhedralSurface, OGRMultiSurface, OGRGeometryCollection, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, OGRSimpleCurve, and OGRPoint.
Referenced by OGRGeometryFactory::createFromWkt(), OGR_G_ImportFromWkt(), and OSRImportFromWkt().
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Deprecated.
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Compute intersection.
Generates a new geometry which is the region of intersection of the two geometries operated on. The Intersects() method can be used to test if two geometries intersect.
This method is the same as the C function OGR_G_Intersection().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the other geometry intersected with "this" geometry. |
References CPLError().
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virtual |
Do these features intersect?
Determines whether two geometries intersect. If GEOS is enabled, then this is done in rigorous fashion otherwise TRUE is returned if the envelopes (bounding boxes) of the two geometries overlap.
The poOtherGeom argument may be safely NULL, but in this case the method will always return TRUE. That is, a NULL geometry is treated as being everywhere.
This method is the same as the C function OGR_G_Intersects().
poOtherGeom | the other geometry to test against. |
Reimplemented in OGRCurvePolygon, and OGRPoint.
References createGEOSContext(), exportToGEOS(), freeGEOSContext(), and getEnvelope().
Referenced by OGRPoint::Intersects(), and OGRCurvePolygon::Intersects().
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inline |
Returns whether the geometry has a Z component.
Referenced by OGRSimpleCurve::addPoint(), Distance3D(), OGRPoint::exportToWkb(), OGRSimpleCurve::exportToWkb(), OGRPolygon::exportToWkb(), OGRPoint::exportToWkt(), OGRSimpleCurve::exportToWkt(), OGRPolygon::exportToWkt(), OGRCurve::get_IsClosed(), OGR_G_Is3D(), and OGRTriangulatedSurface::operator=().
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pure virtual |
Returns TRUE (non-zero) if the object has no points.
Normally this returns FALSE except between when an object is instantiated and points have been assigned.
This method relates to the SFCOM IGeometry::IsEmpty() method.
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRSimpleCurve, and OGRPoint.
Referenced by OGRCurve::CastToCompoundCurve(), OGRSimpleCurve::Equals(), OGRCurvePolygon::Equals(), OGRGeometryCollection::Equals(), OGRPolyhedralSurface::Equals(), OGRGeometryFactory::forceTo(), OGRGeometryCollection::getEnvelope(), OGRGeometryCollection::IsEmpty(), and OGR_G_IsEmpty().
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inline |
Returns whether the geometry has a M component.
Referenced by OGRSimpleCurve::addPoint(), OGRPoint::exportToWkb(), OGRSimpleCurve::exportToWkb(), OGRPolygon::exportToWkb(), OGRPoint::exportToWkt(), OGRSimpleCurve::exportToWkt(), OGRPolygon::exportToWkt(), OGR_G_IsMeasured(), and OGRTriangulatedSurface::operator=().
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virtual |
Test if the geometry is a ring.
This method is the same as the C function OGR_G_IsRing().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always return FALSE.
References CPLError().
Referenced by OGR_G_IsRing().
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Test if the geometry is simple.
This method is the same as the C function OGR_G_IsSimple().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always return FALSE.
References CPLError().
Referenced by OGR_G_IsSimple().
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Test if the geometry is valid.
This method is the same as the C function OGR_G_IsValid().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always return FALSE.
Reimplemented in OGRCircularString.
References CPLError().
Referenced by OGRCircularString::IsValid(), and OGR_G_IsValid().
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inline |
Returns if two geometries are different.
OGRGeometry & OGRGeometry::operator= | ( | const OGRGeometry & | other | ) |
Assignment operator.
Note: before GDAL 2.1, only the default implementation of the operator existed, which could be unsafe to use.
References assignSpatialReference(), and getSpatialReference().
Referenced by OGRPoint::operator=(), OGRSimpleCurve::operator=(), OGRCompoundCurve::operator=(), OGRCurvePolygon::operator=(), OGRGeometryCollection::operator=(), OGRPolyhedralSurface::operator=(), and OGRTriangulatedSurface::operator=().
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Returns if two geometries are equal.
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Test for overlap.
Tests if this geometry and the other passed into the method overlap, that is their intersection has a non-zero area.
This method is the same as the C function OGR_G_Overlaps().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the geometry to compare to this geometry. |
References CPLError().
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Polygonizes a set of sparse edges.
A new geometry object is created and returned containing a collection of reassembled Polygons: NULL will be returned if the input collection doesn't corresponds to a MultiLinestring, or when reassembling Edges into Polygons is impossible due to topological inconsistencies.
This method is the same as the C function OGR_G_Polygonize().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
References CPLError().
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Modify the geometry such it has no segment longer then the given distance.
Add intermediate vertices to a geometry.
Interpolated points will have Z and M values (if needed) set to 0. Distance computation is performed in 2d only
This function is the same as the C function OGR_G_Segmentize()
dfMaxLength | the maximum distance between 2 points after segmentization |
This method modifies the geometry to add intermediate vertices if necessary so that the maximum length between 2 consecutive vertices is lower than dfMaxLength.
dfMaxLength | maximum length between 2 consecutive vertices. |
Reimplemented in OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRCircularString, and OGRSimpleCurve.
Referenced by OGRGeometryCollection::segmentize().
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Add or remove the Z coordinate dimension.
This method adds or removes the explicit Z coordinate dimension. Removing the Z coordinate dimension of a geometry will remove any existing Z values. Adding the Z dimension to a geometry collection, a compound curve, a polygon, etc. will affect the children geometries.
bIs3D | Should the geometry have a Z dimension, either TRUE or FALSE. |
Reimplemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, and OGRSimpleCurve.
Referenced by OGR_G_Set3D(), OGRGeometryCollection::set3D(), and OGRPolyhedralSurface::set3D().
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Set the coordinate dimension.
This method sets the explicit coordinate dimension. Setting the coordinate dimension of a geometry to 2 should zero out any existing Z values. Setting the dimension of a geometry collection, a compound curve, a polygon, etc. will affect the children geometries. This will also remove the M dimension if present before this call.
nNewDimension | New coordinate dimension value, either 2 or 3. |
Reimplemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRSimpleCurve, and OGRPoint.
References setMeasured().
Referenced by OGRGeometryCollection::setCoordinateDimension(), and OGRPolyhedralSurface::setCoordinateDimension().
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Add or remove the M coordinate dimension.
This method adds or removes the explicit M coordinate dimension. Removing the M coordinate dimension of a geometry will remove any existing M values. Adding the M dimension to a geometry collection, a compound curve, a polygon, etc. will affect the children geometries.
bIsMeasured | Should the geometry have a M dimension, either TRUE or FALSE. |
Reimplemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, and OGRSimpleCurve.
Referenced by OGRPoint::flattenTo2D(), OGR_G_SetMeasured(), setCoordinateDimension(), OGRPoint::setCoordinateDimension(), OGRGeometryCollection::setMeasured(), and OGRPolyhedralSurface::setMeasured().
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Simplify the geometry.
This function is the same as the C function OGR_G_Simplify().
This function is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this function will always fail, issuing a CPLE_NotSupported error.
dTolerance | the distance tolerance for the simplification. |
References CPLError().
OGRGeometry * OGRGeometry::SimplifyPreserveTopology | ( | double | dTolerance | ) | const |
Simplify the geometry while preserving topology.
This function is the same as the C function OGR_G_SimplifyPreserveTopology().
This function is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this function will always fail, issuing a CPLE_NotSupported error.
dTolerance | the distance tolerance for the simplification. |
References CPLError().
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Swap x and y coordinates.
Reimplemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRSimpleCurve, and OGRPoint.
Referenced by OGR_G_SwapXY(), and OGRGeometryCollection::swapXY().
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Compute symmetric difference.
Generates a new geometry which is the symmetric difference of this geometry and the second geometry passed into the method.
This method is the same as the C function OGR_G_SymDifference().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the other geometry. |
References CPLError().
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Down-cast to OGRCircularString*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbCircularString.
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Down-cast to OGRCircularString*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbCircularString.
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Down-cast to OGRCompoundCurve*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbCompoundCurve.
Referenced by dumpReadable(), and OGRCompoundCurve::Equals().
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Down-cast to OGRCompoundCurve*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbCompoundCurve.
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Down-cast to OGRCurve*. Implies prior checking that OGR_GT_IsSubClass(getGeometryType(), wkbCurve).
Referenced by OGRCompoundCurve::addCurve(), OGRCurvePolygon::addRing(), OGRGeometryFactory::curveFromLineString(), OGRGeometryFactory::forceTo(), OGRGeometryFactory::forceToLineString(), OGRGeometryFactory::forceToMultiLineString(), OGRGeometryFactory::forceToPolygon(), OGRGeometryCollection::get_Area(), OGRGeometryCollection::get_Length(), and OGR_G_GetPointCount().
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Down-cast to OGRCurve*. Implies prior checking that OGR_GT_IsSubClass(getGeometryType(), wkbCurve).
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Down-cast to OGRCurvePolygon*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbCurvePolygon or wkbPolygon or wkbTriangle.
Referenced by OGRCurvePolygon::clone(), OGRGeometryCollection::closeRings(), dumpReadable(), OGRCurvePolygon::Equals(), OGRGeometryFactory::forceToLineString(), OGRGeometryFactory::forceToMultiLineString(), OGRGeometryFactory::forceToMultiPolygon(), OGRGeometryFactory::forceToPolygon(), OGRPoint::Intersects(), and OGRPoint::Within().
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Down-cast to OGRCurvePolygon*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbCurvePolygon or wkbPolygon or wkbTriangle.
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Down-cast to OGRGeometryCollection*. Implies prior checking that OGR_GT_IsSubClass(getGeometryType(), wkbGeometryCollection).
Referenced by OGRGeometryCollection::clone(), dumpReadable(), OGRGeometryCollection::Equals(), OGRGeometryFactory::forceTo(), OGRGeometryFactory::forceToLineString(), OGRGeometryFactory::forceToMultiLineString(), OGRGeometryFactory::forceToMultiPoint(), OGRGeometryFactory::forceToMultiPolygon(), OGRGeometryFactory::forceToPolygon(), OGRGeometryCollection::get_Area(), OGRGeometryCollection::get_Length(), OGRGeometryCollection::getCurveGeometry(), OGRGeometryCollection::getLinearGeometry(), and OGRGeometryFactory::transformWithOptions().
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Down-cast to OGRGeometryCollection*. Implies prior checking that OGR_GT_IsSubClass(getGeometryType(), wkbGeometryCollection).
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inlinestatic |
Convert a OGRGeometry* to a OGRGeometryH.
Referenced by exportToGML(), exportToJson(), exportToKML(), OGRFeature::GetFieldAsDouble(), OGRFeature::GetFieldAsInteger64(), OGRFeature::GetFieldAsString(), OGRFeature::IsFieldSet(), OGR_F_GetGeometryRef(), OGR_F_GetGeomFieldRef(), OGR_F_StealGeometry(), OGR_G_Boundary(), OGR_G_Buffer(), OGR_G_Clone(), OGR_G_ConvexHull(), OGR_G_DelaunayTriangulation(), OGR_G_Difference(), OGR_G_Intersection(), OGR_G_Polygonize(), OGR_G_Simplify(), OGR_G_SimplifyPreserveTopology(), OGR_G_SymDifference(), OGR_G_Union(), OGR_G_UnionCascaded(), and OGR_L_GetSpatialFilter().
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Down-cast to OGRLinearRing*. Implies prior checking that EQUAL(getGeometryName(), "LINEARRING").
Referenced by OGRPolygon::exportToWkt(), OGRPolygon::getExteriorRing(), OGRPolygon::getInteriorRing(), OGRPolygon::stealExteriorRing(), and OGRPolygon::stealInteriorRing().
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Down-cast to OGRLinearRing*. Implies prior checking that EQUAL(getGeometryName(), "LINEARRING").
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Down-cast to OGRLineString*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbLineString.
Referenced by OGRLineString::CurveToLine(), and OGRGeometryFactory::forceToLineString().
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Down-cast to OGRLineString*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbLineString.
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Down-cast to OGRMultiCurve*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiCurve and derived types.
Referenced by OGRGeometryFactory::forceToMultiLineString().
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Down-cast to OGRMultiCurve*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiCurve and derived types.
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Down-cast to OGRMultiLineString*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiLineString.
Referenced by OGRGeometryFactory::forceToMultiLineString().
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Down-cast to OGRMultiLineString*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiLineString.
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Down-cast to OGRMultiPoint*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiPoint.
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Down-cast to OGRMultiPoint*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiPoint.
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Down-cast to OGRMultiPolygon*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiPolygon.
Referenced by OGRGeometryFactory::forceTo(), OGRGeometryFactory::forceToMultiLineString(), and OGRGeometryFactory::forceToMultiPolygon().
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Down-cast to OGRMultiPolygon*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiPolygon.
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Down-cast to OGRMultiSurface*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiSurface and derived types.
Referenced by OGRGeometryFactory::forceToMultiPolygon().
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Down-cast to OGRMultiSurface*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbMultiSurface and derived types.
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Down-cast to OGRPoint*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbPoint.
Referenced by OGRCurvePolygon::Contains(), OGRPoint::Equals(), OGRCurvePolygon::Intersects(), OGR_G_AddPoint(), OGR_G_AddPoint_2D(), OGR_G_AddPointM(), OGR_G_AddPointZM(), OGR_G_GetPoint(), OGR_G_GetPoints(), OGR_G_GetPointsZM(), OGR_G_GetPointZM(), OGR_G_SetPoint(), OGR_G_SetPoint_2D(), OGR_G_SetPointM(), OGR_G_SetPointZM(), and OGRGeometryFactory::transformWithOptions().
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Down-cast to OGRPoint*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbPoint.
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Down-cast to OGRPolygon*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbPolygon or wkbTriangle.
Referenced by OGRTriangulatedSurface::addGeometry(), OGRPolygon::CurvePolyToPoly(), OGRGeometryFactory::forceTo(), OGRGeometryFactory::forceToMultiLineString(), OGRGeometryFactory::forceToPolygon(), and OGRPolyhedralSurface::importFromWkt().
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Down-cast to OGRPolygon*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbPolygon or wkbTriangle.
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Down-cast to OGRPolyhedralSurface*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbPolyhedralSurface or wkbTIN.
Referenced by OGRPolyhedralSurface::clone(), dumpReadable(), OGRPolyhedralSurface::Equals(), OGRGeometryFactory::forceTo(), OGRGeometryFactory::forceToMultiPolygon(), and OGRGeometryFactory::forceToPolygon().
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Down-cast to OGRPolyhedralSurface*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbPolyhedralSurface or wkbTIN.
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Down-cast to OGRSimpleCurve*. Implies prior checking that getGeometryType() is wkbLineString, wkbCircularString or a derived type.
Referenced by OGRSimpleCurve::clone(), dumpReadable(), OGRSimpleCurve::Equals(), OGR_G_AddPoint(), OGR_G_AddPoint_2D(), OGR_G_AddPointM(), OGR_G_AddPointZM(), OGR_G_GetPoints(), OGR_G_GetPointsZM(), and OGR_G_SetPointCount().
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Down-cast to OGRSimpleCurve*. Implies prior checking that getGeometryType() is wkbLineString, wkbCircularString or a derived type.
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Down-cast to OGRSurface*. Implies prior checking that OGR_GT_IsSubClass(getGeometryType(), wkbSurface).
Referenced by OGRGeometryFactory::forceToPolygon(), OGRGeometryCollection::get_Area(), and OGRMultiSurface::importFromWkt().
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Down-cast to OGRSurface*. Implies prior checking that OGR_GT_IsSubClass(getGeometryType(), wkbSurface).
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Down-cast to OGRTriangle*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbTriangle.
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Down-cast to OGRTriangle*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbTriangle.
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Down-cast to OGRTriangulatedSurface*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbTIN.
Referenced by OGRGeometryFactory::forceTo().
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Down-cast to OGRTriangulatedSurface*. Implies prior checking that wkbFlatten(getGeometryType()) == wkbTIN.
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Test for touching.
Tests if this geometry and the other passed into the method are touching.
This method is the same as the C function OGR_G_Touches().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the geometry to compare to this geometry. |
References CPLError().
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Apply arbitrary coordinate transformation to geometry.
This method will transform the coordinates of a geometry from their current spatial reference system to a new target spatial reference system. Normally this means reprojecting the vectors, but it could include datum shifts, and changes of units.
Note that this method does not require that the geometry already have a spatial reference system. It will be assumed that they can be treated as having the source spatial reference system of the OGRCoordinateTransformation object, and the actual SRS of the geometry will be ignored. On successful completion the output OGRSpatialReference of the OGRCoordinateTransformation will be assigned to the geometry.
This method is the same as the C function OGR_G_Transform().
poCT | the transformation to apply. |
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRCurvePolygon, OGRCompoundCurve, OGRLinearRing, OGRSimpleCurve, and OGRPoint.
Referenced by OGRGeometryCollection::transform(), and OGRGeometryFactory::transformWithOptions().
OGRErr OGRGeometry::transformTo | ( | OGRSpatialReference * | poSR | ) |
Transform geometry to new spatial reference system.
This method will transform the coordinates of a geometry from their current spatial reference system to a new target spatial reference system. Normally this means reprojecting the vectors, but it could include datum shifts, and changes of units.
This method will only work if the geometry already has an assigned spatial reference system, and if it is transformable to the target coordinate system.
Because this method requires internal creation and initialization of an OGRCoordinateTransformation object it is significantly more expensive to use this method to transform many geometries than it is to create the OGRCoordinateTransformation in advance, and call transform() with that transformation. This method exists primarily for convenience when only transforming a single geometry.
This method is the same as the C function OGR_G_TransformTo().
poSR | spatial reference system to transform to. |
< Failure
< Failure
< Failure
References CPLError(), and getSpatialReference().
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Compute union.
Generates a new geometry which is the region of union of the two geometries operated on.
This method is the same as the C function OGR_G_Union().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the other geometry unioned with "this" geometry. |
References CPLError().
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virtual |
Compute union using cascading.
This method is the same as the C function OGR_G_UnionCascaded().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
References CPLError().
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virtual |
Test for containment.
Tests if actual geometry object is within the passed geometry.
This method is the same as the C function OGR_G_Within().
This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.
poOtherGeom | the geometry to compare to this geometry. |
Reimplemented in OGRPoint.
References CPLError().
Referenced by OGRPoint::Within().
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pure virtual |
Returns size of related binary representation.
This method returns the exact number of bytes required to hold the well known binary representation of this geometry object. Its computation may be slightly expensive for complex geometries.
This method relates to the SFCOM IWks::WkbSize() method.
This method is the same as the C function OGR_G_WkbSize().
Implemented in OGRPolyhedralSurface, OGRGeometryCollection, OGRPolygon, OGRCurvePolygon, OGRCompoundCurve, OGRLinearRing, OGRSimpleCurve, and OGRPoint.
Referenced by OGR_G_WkbSize().