starling_sim.basemodel.topology.empty_network

Module Contents

Classes

EmptyNetwork

An initially empty topology
class starling_sim.basemodel.topology.empty_network.EmptyNetwork(transport_mode, weight_class=None, store_paths=False)

Bases: starling_sim.basemodel.topology.topology.Topology

An initially empty topology

init_graph()

Initialise the network graph from any data source.

add_time_and_length(u, v, d)

Set the TIME_ATTRIBUTE and LENGTH_ATTRIBUTE attributes on the graph edge.

Parameters:

  • u – edge origin

  • v – edge destination

  • d – edge data

position_localisation(position)

Return the localisation [lat, lon] of the position

Parameters:

position – position in the topology

Returns:

list [lat, lon]

nearest_position(localisation)

Return the nearest position to given localisation (lat, lon)

Parameters:

localisation – (lat, lon) tuple

Returns:

position

localisations_nearest_nodes(x_coordinates, y_coordinates, return_dist=False)

Return the graph nodes nearest to a list of points.

This method should allow a faster computation than multiple nearest_position calls.

Parameters:

  • x_coordinates – list of X coordinates of the localisations (lon in GPS)

  • y_coordinates – list of Y coordinates of the localisations (lat in GPS)

  • return_dist – optionally also return distance between points and nearest nodes

Returns:

list of nearest nodes