Subgroup: Spatial

Class: QgsSpatialIndexKDBush

class qgis.core.QgsSpatialIndexKDBush(fi: QgsFeatureIterator, feedback: QgsFeedback = None)

Bases: sip.wrapper

Constructor - creates KDBush index and bulk loads it with features from the iterator.

The optional feedback object can be used to allow cancelation of bulk feature loading. Ownership of feedback is not transferred, and callers must take care that the lifetime of feedback exceeds that of the spatial index construction.

Any non-single point features encountered during iteration will be ignored and not included in the index.

QgsSpatialIndexKDBush(source: QgsFeatureSource, feedback: QgsFeedback = None) Constructor - creates KDBush index and bulk loads it with features from the source.

The optional feedback object can be used to allow cancelation of bulk feature loading. Ownership of feedback is not transferred, and callers must take care that the lifetime of feedback exceeds that of the spatial index construction.

Any non-single point features encountered during iteration will be ignored and not included in the index.

QgsSpatialIndexKDBush(other: QgsSpatialIndexKDBush) Copy constructor

A very fast static spatial index for 2D points based on a flat KD-tree.

Compared to QgsSpatialIndex, this index: - supports single point features only (no multipoints) - is static (features cannot be added or removed from the index after construction) - is much faster! - allows direct retrieval of the original feature’s points, without requiring additional feature requests - supports true “distance based” searches, i.e. return all points within a radius from a search point

QgsSpatialIndexKDBush objects are implicitly shared and can be inexpensively copied.

See also

QgsSpatialIndex

New in version 3.4: Methods

intersects Returns the list of features which fall within the specified rectangle.
size Returns the size of the index, i.e.
within Returns the list of features which are within the given search radius of point.

Signals

Attributes

intersects(self, rectangle: QgsRectangle) → object

Returns the list of features which fall within the specified rectangle.

size(self) → int

Returns the size of the index, i.e. the number of points contained within the index.

within(self, point: QgsPointXY, radius: float) → List[QgsSpatialIndexKDBushData]

Returns the list of features which are within the given search radius of point.