QgsOverlayAnalyzer Class Reference

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

#include <qgsoverlayanalyzer.h>

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 (QgsFields &fieldListA, const QgsFields &fieldListB)
void	intersectFeature (QgsFeature &f, QgsVectorFileWriter *vfw, QgsVectorLayer *dp, QgsSpatialIndex *index)
void	combineAttributeMaps (QgsAttributes &attributesA, const QgsAttributes &attributesB)

Detailed Description

The QGis class provides vector overlay analysis functions.

Definition at line 37 of file qgsoverlayanalyzer.h.

Member Function Documentation

void QgsOverlayAnalyzer::combineAttributeMaps ( QgsAttributes &  attributesA, const QgsAttributes &  attributesB  )

private

Definition at line 205 of file qgsoverlayanalyzer.cpp.

Referenced by intersectFeature().

void QgsOverlayAnalyzer::combineFieldLists ( QgsFields &  fieldListA, const QgsFields &  fieldListB  )

private

Definition at line 184 of file qgsoverlayanalyzer.cpp.

References QgsFields::append(), QgsFields::count(), 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::attributes(), QgsGeometry::boundingBox(), combineAttributeMaps(), QgsFeature::geometry(), QgsVectorLayer::getFeatures(), QgsGeometry::intersection(), QgsSpatialIndex::intersects(), QgsGeometry::intersects(), QgsFeatureIterator::nextFeature(), QgsFeature::setAttributes(), and QgsFeature::setGeometry().

Referenced by intersection().

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 30 of file qgsoverlayanalyzer.cpp.

References combineFieldLists(), QgsMapLayer::crs(), QgsVectorLayer::dataProvider(), QgsVectorDataProvider::encoding(), QgsVectorLayer::featureCount(), QgsVectorDataProvider::geometryType(), QgsVectorLayer::getFeatures(), index, QgsSpatialIndex::insertFeature(), intersectFeature(), QgsFeatureIterator::nextFeature(), QgsVectorLayer::pendingFields(), and QgsVectorLayer::selectedFeaturesIds().

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

• /tmp/buildd/qgis-2.2.0+wheezy1/src/analysis/vector/qgsoverlayanalyzer.h
• /tmp/buildd/qgis-2.2.0+wheezy1/src/analysis/vector/qgsoverlayanalyzer.cpp