momepy.cds_length¶

momepy.cds_length(graph, radius=5, mode='sum', name='cds_len', degree='degree', length='mm_len', distance=None, verbose=True)[source]¶

Calculates length of cul-de-sacs for subgraph around each node if radius is set, or for whole graph, if radius=None.

Subgraph is generated around each node within set radius. If distance=None, radius will define topological distance, otherwise it uses values in distance attribute.

Parameters

graphnetworkx.Graph: Graph representing street network. Ideally generated from GeoDataFrame using momepy.gdf_to_nx()
radiusint: Include all neighbors of distance <= radius from n
modestr (default ‘sum’): if 'sum', calculate total length, if 'mean' calculate mean length
namestr, optional: calculated attribute name
degreestr: name of attribute of node degree (momepy.node_degree())
lengthstr, optional: name of attribute of segment length (geographical)
distancestr, optional: Use specified edge data key as distance. For example, setting distance=’weight’ will use the edge weight to measure the distance from the node n.
verbosebool (default True): if True, shows progress bars in loops and indication of steps

Returns

Graph: networkx.Graph if radius is set
float: length of cul-de-sacs for graph if radius=None

Examples

>>> network_graph = mm.cds_length(network_graph, radius=9, mode='mean')

momepy.betweenness_centrality momepy.closeness_centrality