Class: QgsAbstractGeometrySimplifier¶

Abstract base class for simplifying geometries using a specific algorithm.

Note

This is an abstract class, with methods which must be implemented by a subclass.

The following methods must be implemented: simplify()

Class Hierarchy¶

`QgsMapToPixelSimplifier`	Implementation of a geometry simplifier using the “MapToPixel” algorithm.
`QgsTopologyPreservingSimplifier`	Implementation of GeometrySimplifier using the Douglas-Peucker algorithm.

Abstract Methods

Returns a simplified version the specified geometry

Static Methods

Returns whether the device-envelope can be replaced by its BBOX when is applied the specified tolerance

class qgis.core.QgsAbstractGeometrySimplifier[source]¶

Bases: object

static isGeneralizableByDeviceBoundingBox(envelope: QgsRectangle, mapToPixelTol: float = 1) → bool[source]¶

Returns whether the device-envelope can be replaced by its BBOX when is applied the specified tolerance

Parameters:

Return type:

bool

static isGeneralizableByDeviceBoundingBox(points: Iterable[QPointF | QPoint], mapToPixelTol: float = 1) → bool[source]

Returns whether the device-geometry can be replaced by its BBOX when is applied the specified tolerance

Parameters:

Return type:

bool

abstract simplify(self, geometry: QgsGeometry) → QgsGeometry[source]¶

Returns a simplified version the specified geometry

abstract simplify(self, geometry: QgsAbstractGeometry | None) → QgsAbstractGeometry | None[source]

Returns a simplified version the specified geometry.

Will return None if no simplification is to be performed to the geometry.

Caller takes ownership of the returned geometry.

Added in version 3.18.