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sip fixes: networkanalysis is a separate module
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/** \ingroup analysis | ||
* The QGis class provides vector geometry analysis functions | ||
*/ | ||
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class QgsGeometryAnalyzer | ||
{ | ||
%TypeHeaderCode | ||
#include <qgsgeometryanalyzer.h> | ||
%End | ||
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public: | ||
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/**Simplify vector layer using (a modified) Douglas-Peucker algorithm | ||
and write it to a new shape file | ||
@param layer input vector layer | ||
@param shapefileName path to the output shp | ||
@param tolerance (level of simplification) | ||
@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 simplify( QgsVectorLayer* layer, const QString& shapefileName, double tolerance, | ||
bool onlySelectedFeatures = false, QProgressDialog* p = 0 ); | ||
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/**Calculate the true centroids, or 'center of mass' for a vector layer and | ||
write it to a new shape file | ||
@param layer 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 centroids( QgsVectorLayer* layer, const QString& shapefileName, | ||
bool onlySelectedFeatures = false, QProgressDialog* p = 0 ); | ||
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/**Create a polygon based on the extent of all (selected) features and write it to a new shape file | ||
@param layer 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 extent( QgsVectorLayer* layer, const QString& shapefileName, bool onlySelectedFeatures = false, QProgressDialog* p = 0 ); | ||
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/**Create buffers for a vector layer and write it to a new shape file | ||
@param layer input vector layer | ||
@param shapefileName path to the output shp | ||
@param bufferDistance distance for buffering (if no buffer field is specified) | ||
@param onlySelectedFeatures if true, only selected features are considered, else all the features | ||
@param dissolve if true, merge all the buffers to a big multipolygon | ||
@param bufferDistanceField index of the attribute field that contains the buffer distance (or -1 if all features have the same buffer distance) | ||
@param p progress dialog (or 0 if no progress dialog is to be shown) | ||
@note: added in version 1.3*/ | ||
bool buffer( QgsVectorLayer* layer, const QString& shapefileName, double bufferDistance, | ||
bool onlySelectedFeatures = false, bool dissolve = false, int bufferDistanceField = -1, QProgressDialog* p = 0 ); | ||
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/**Create convex hull(s) of a vector layer and write it to a new shape file | ||
@param layer input vector layer | ||
@param shapefileName path to the output shp | ||
@param onlySelectedFeatures if true, only selected features are considered, else all the features | ||
@param uniqueIdField index of the attribute field that contains the unique convex hull id (or -1 if | ||
all features have the same buffer distance) | ||
@param p progress dialog (or 0 if no progress dialog is to be shown) | ||
@note: added in version 1.4*/ | ||
bool convexHull( QgsVectorLayer* layer, const QString& shapefileName, bool onlySelectedFeatures = false, | ||
int uniqueIdField = -1, QProgressDialog* p = 0 ); | ||
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/**Dissolve a vector layer and write it to a new shape file | ||
@param layer input vector layer | ||
@param shapefileName path to the output shp | ||
@param onlySelectedFeatures if true, only selected features are considered, else all the features | ||
@param uniqueIdField index of the attribute field that contains the unique id to dissolve on (or -1 if | ||
all features should be dissolved together) | ||
@param p progress dialog (or 0 if no progress dialog is to be shown) | ||
@note: added in version 1.4*/ | ||
bool dissolve( QgsVectorLayer* layer, const QString& shapefileName, bool onlySelectedFeatures = false, | ||
int uniqueIdField = -1, QProgressDialog* p = 0 ); | ||
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/**Creates an event layer (multipoint or multiline) by locating features from a (non-spatial) event table along the features of a line layer. | ||
Note that currently (until QgsGeometry supports m-values) the z-coordinate of the line layer is used for linear referencing | ||
@param lineLayer layer with the line geometry | ||
@param eventLayer layer with features and location field | ||
@param lineField join index in line layer | ||
@param eventField join index in event layer | ||
@param outputLayer name of output file (can be empty if a memory layer is used) | ||
@param outputFormat name of output format (can be empty if a memory provider is used to store the results) | ||
@param unlocatedFeatureIds out: ids of event features where linear referencing was not successful | ||
@param locationField1 attribute index of location field in event layer | ||
@param locationField2 attribute index of location end field (or -1 for point layer) | ||
@param offsetField attribute index for offset field. Negative offset value = offset to left side, positive value = offset to right side | ||
@param offsetScale factor to scale offset | ||
@param forceSingleGeometry force layer to single point/line type. Feature attributes are copied in case of multiple matches | ||
@param memoryProvider memory provider to write output to (can be 0 if output is written to a file) | ||
@param p progress dialog or 0 if no progress dialog should be shown | ||
*/ | ||
bool eventLayer( QgsVectorLayer* lineLayer, QgsVectorLayer* eventLayer, int lineField, int eventField, QList<int>& unlocatedFeatureIds, const QString& outputLayer, | ||
const QString& outputFormat, int locationField1, int locationField2 = -1, int offsetField = -1, double offsetScale = 1.0, | ||
bool forceSingleGeometry = false, QgsVectorDataProvider* memoryProvider = 0, QProgressDialog* p = 0 ); | ||
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/**Returns linear reference geometry as a multiline (or 0 if no match). Currently, the z-coordinates are considered to be the measures (no support for m-values in QGIS)*/ | ||
QgsGeometry* locateBetweenMeasures( double fromMeasure, double toMeasure, QgsGeometry* lineGeom ); | ||
/**Returns linear reference geometry. Unlike the PostGIS function, this method always returns multipoint or 0 if no match (not geometry collection). | ||
Currently, the z-coordinates are considered to be the measures (no support for m-values in QGIS)*/ | ||
QgsGeometry* locateAlongMeasure( double measure, QgsGeometry* lineGeom ); | ||
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}; |
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