Class: QgsNetworkStrategy¶

Defines strategy used for calculation of the edge cost in networks.

For example it can take into account travel distance, amount of time or money. Currently there are two strategies implemented in the analysis library: QgsNetworkDistanceStrategy and QgsNetworkSpeedStrategy. QgsNetworkStrategy implemented using “strategy” design pattern.

Note

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

The following methods must be implemented: cost()

Class Hierarchy¶

`QgsNetworkDistanceStrategy`	Strategy for calculating edge cost based on its length.
`QgsNetworkSpeedStrategy`	Strategy for calculating edge cost based on travel time.

Abstract Methods

Returns edge cost

Virtual Methods

In PyQGIS, only methods marked as virtual can be safely overridden in a Python subclass of QgsNetworkStrategy. See the FAQ for more details.

Returns a list of the source layer attributes needed for cost calculation.

class qgis.analysis.QgsNetworkStrategy[source]¶

Bases: object

abstract cost(self, distance: float, f: QgsFeature) → Any[source]¶

Returns edge cost

Parameters:

Return type:

Any

virtual requiredAttributes(self) → Any¶

Returns a list of the source layer attributes needed for cost calculation. This is method called by QgsGraphDirector.