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¶

Subclasses¶

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

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

isGeneralizableByDeviceBoundingBox(points: Iterable[Union[QPointF, QPoint]], mapToPixelTol: float = 1) -> bool Returns whether the device-geometry can be replaced by its BBOX when is applied the specified tolerance

Parameters:

envelope (QgsRectangle)
mapToPixelTol (float = 1)

Return type:

bool

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

Returns a simplified version the specified geometry

simplify(self, geometry: Optional[QgsAbstractGeometry]) -> Optional[QgsAbstractGeometry] 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.

Parameters:: geometry (QgsGeometry)
Return type:: QgsGeometry