Class: QgsInternalGeometrySnapper

QgsInternalGeometrySnapper allows a set of geometries to be snapped to each other. It can be used to close gaps in layers.

To use QgsInternalGeometrySnapper, first construct the snapper using the desired snap parameters. Then, features are fed to to the snapper one-by-one by calling snapFeature(). Each feature passed by calling snapFeature() will be snapped to any features which have already been processed by the snapper.

After processing all desired features, the results can be fetched by calling snappedGeometries(). The returned QgsGeometryMap can be passed to QgsVectorDataProvider.changeGeometryValues() to save the snapped geometries back to the source layer.

Methods

snapFeature	Snaps a single feature's geometry against all feature geometries already processed by calls to snapFeature() in this object, and returns the snapped geometry.
snappedGeometries	Returns a QgsGeometryMap of all feature geometries snapped by this object.

class qgis.analysis.QgsInternalGeometrySnapper

Bases: object

__init__(snapTolerance: float, mode: QgsGeometrySnapper.SnapMode = QgsGeometrySnapper.PreferNodes)

Constructor for QgsInternalGeometrySnapper. The snapTolerance and mode parameters dictate how geometries will be snapped by the snapper.

Parameters:

• snapTolerance (float)

• mode (QgsGeometrySnapper.SnapMode = QgsGeometrySnapper.PreferNodes)

__init__(a0: QgsInternalGeometrySnapper)

Parameters:

a0 (QgsInternalGeometrySnapper)

snapFeature(self, feature: QgsFeature) → QgsGeometry

Snaps a single feature’s geometry against all feature geometries already processed by calls to snapFeature() in this object, and returns the snapped geometry.

Parameters:

feature (QgsFeature)

Return type:

QgsGeometry

snappedGeometries(self) → Any

Returns a QgsGeometryMap of all feature geometries snapped by this object.

Return type:

Any