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qgsoverlayanalyzer.h
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qgsoverlayanalyzer.h
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/***************************************************************************
qgsoverlayanalyzer.h - QGIS Tools for vector geometry analysis
-------------------
begin : 19 March 2009
copyright : (C) Carson Farmer
email : carson.farmer@gmail.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
/* $Id: qgis.h 9774 2008-12-12 05:41:24Z timlinux $ */
#ifndef QGSOVERLAYANALYZERH
#define QGSOVERLAYANALYZERH
#include "qgsvectorlayer.h"
#include "qgsfield.h"
#include "qgsspatialindex.h"
#include "qgsfeature.h"
#include "qgsgeometry.h"
#include "qgsfield.h"
#include "qgsdistancearea.h"
class QgsVectorFileWriter;
class QProgressDialog;
/** \ingroup analysis
* The QGis class provides vector overlay analysis functions
*/
class ANALYSIS_EXPORT QgsOverlayAnalyzer
{
public:
/**Perform an intersection on two input vector layers and write output to a new shape file
@param layerA input vector layer
@param layerB input vector layer
@param shapefileName path to the output shp
@param onlySelectedFeatures if true, only selected features are considered, else all the features
@param p progress dialog (or 0 if no progress dialog is to be shown)
@note: added in version 1.4*/
bool intersection( QgsVectorLayer* layerA, QgsVectorLayer* layerB, \
const QString& shapefileName, bool onlySelectedFeatures = false, \
QProgressDialog* p = 0 );
#if 0
/**Perform a union of two input vector layers and write output to a new shape file
@param layerA input vector layer
@param layerB input vector layer
@param shapefileName path to the output shp
@param onlySelectedFeatures if true, only selected features are considered, else all the features
@param p progress dialog (or 0 if no progress dialog is to be shown)
@note: added in version 1.4*/
bool combine( QgsVectorLayer* layerA, QgsVectorLayer* layerB,
const QString& shapefileName, bool onlySelectedFeatures = false,
QProgressDialog* p = 0 );
/**Clip a vector layer based on the boundary of another vector layer and
write output to a new shape file
@param layerA input vector layer
@param layerB input vector layer
@param shapefileName path to the output shp
@param onlySelectedFeatures if true, only selected features are considered, else all the features
@param p progress dialog (or 0 if no progress dialog is to be shown)
@note: added in version 1.4*/
bool clip( QgsVectorLayer* layerA, QgsVectorLayer* layerB,
const QString& shapefileName, bool onlySelectedFeatures = false,
QProgressDialog* p = 0 );
/**Difference a vector layer based on the geometries of another vector layer
and write the output to a new shape file
@param layerA input vector layer
@param layerB input vector layer
@param shapefileName path to the output shp
@param onlySelectedFeatures if true, only selected features are considered, else all the features
@param p progress dialog (or 0 if no progress dialog is to be shown)
@note: added in version 1.4*/
bool difference( QgsVectorLayer* layerA, QgsVectorLayer* layerB,
const QString& shapefileName, bool onlySelectedFeatures = false,
QProgressDialog* p = 0 );
/**Intersect two vector layers and write the geometries of each layer that
do not intersect with the other layer to a new shape file (Symmetrical difference)
@param layerA input vector layer
@param layerB input vector layer
@param shapefileName path to the output shp
@param onlySelectedFeatures if true, only selected features are considered, else all the features
@param p progress dialog (or 0 if no progress dialog is to be shown)
@note: added in version 1.4*/
bool symDifference( QgsVectorLayer* layerA, QgsVectorLayer* layerB,
const QString& shapefileName, bool onlySelectedFeatures = false,
QProgressDialog* p = 0 );
#endif
private:
void combineFieldLists( QgsFieldMap& fieldListA, QgsFieldMap fieldListB );
void intersectFeature( QgsFeature& f, QgsVectorFileWriter* vfw, QgsVectorLayer* dp, QgsSpatialIndex* index );
void combineAttributeMaps( QgsAttributeMap& attributeMapA, QgsAttributeMap attributeMapB );
};
#endif //QGSVECTORANALYZER