QgsOverlayAnalyzer Class Reference
[QGIS analysis library.]

The QGis class provides vector overlay analysis functions. More...

#include <qgsoverlayanalyzer.h>

List of all members.

Public Member Functions
bool	intersection (QgsVectorLayer *layerA, QgsVectorLayer *layerB, const QString &shapefileName, bool onlySelectedFeatures=false, QProgressDialog *p=0)
	Perform an intersection on two input vector layers and write output to a new shape file.
Private Member Functions
void	combineFieldLists (QgsFieldMap &fieldListA, QgsFieldMap fieldListB)
void	intersectFeature (QgsFeature &f, QgsVectorFileWriter *vfw, QgsVectorLayer *dp, QgsSpatialIndex *index)
void	combineAttributeMaps (QgsAttributeMap &attributeMapA, QgsAttributeMap attributeMapB)

---

Detailed Description

The QGis class provides vector overlay analysis functions.

Definition at line 38 of file qgsoverlayanalyzer.h.

---

Member Function Documentation

bool QgsOverlayAnalyzer::intersection	(	QgsVectorLayer *	layerA,
		QgsVectorLayer *	layerB,
		const QString &	shapefileName,
		bool	onlySelectedFeatures = false,
		QProgressDialog *	p = 0
	)

Perform an intersection on two input vector layers and write output to a new shape file.

Parameters:

	layerA	input vector layer
	layerB	input vector layer
	shapefileName	path to the output shp
	onlySelectedFeatures	if true, only selected features are considered, else all the features
	p	progress dialog (or 0 if no progress dialog is to be shown)

Note:

: added in version 1.4

Definition at line 31 of file qgsoverlayanalyzer.cpp.

References combineFieldLists(), QgsVectorLayer::dataProvider(), QgsVectorDataProvider::encoding(), QgsVectorLayer::featureAtId(), QgsVectorLayer::featureCount(), QgsVectorDataProvider::fields(), QgsVectorDataProvider::geometryType(), intersectFeature(), QgsVectorLayer::nextFeature(), QgsVectorLayer::pendingAllAttributesList(), QgsVectorLayer::select(), QgsVectorLayer::selectedFeaturesIds(), and QgsMapLayer::srs().

void QgsOverlayAnalyzer::combineFieldLists	(	QgsFieldMap &	fieldListA,
		QgsFieldMap	fieldListB
	)			[private]

Definition at line 184 of file qgsoverlayanalyzer.cpp.

References QgsField::name(), and QgsField::type().

Referenced by intersection().

void QgsOverlayAnalyzer::intersectFeature	(	QgsFeature &	f,
		QgsVectorFileWriter *	vfw,
		QgsVectorLayer *	dp,
		QgsSpatialIndex *	index
	)			[private]

Definition at line 142 of file qgsoverlayanalyzer.cpp.

References QgsVectorFileWriter::addFeature(), QgsFeature::attributeMap(), QgsGeometry::boundingBox(), combineAttributeMaps(), QgsVectorLayer::featureAtId(), QgsFeature::geometry(), QgsGeometry::intersection(), QgsGeometry::intersects(), QgsFeature::setAttributeMap(), and QgsFeature::setGeometry().

Referenced by intersection().

void QgsOverlayAnalyzer::combineAttributeMaps	(	QgsAttributeMap &	attributeMapA,
		QgsAttributeMap	attributeMapB
	)			[private]

Definition at line 214 of file qgsoverlayanalyzer.cpp.

Referenced by intersectFeature().

---

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

• src/analysis/vector/qgsoverlayanalyzer.h
• src/analysis/vector/qgsoverlayanalyzer.cpp