drawIsochrone.py 文件源码

def drawRoads(G, edgeColorAttribute='level', edgeColorScale=9, nodeColorAttribute=None, nodeColorScale=None):

    pos={}
    for n in G.nodes():
        pos[n] = (G.node[n]['longitude'],G.node[n]['latitude'])

    # nodes
    nx.draw_networkx_nodes(G,pos,node_size=0,alpha=0.5,color=colors[-1])

    # edges
    for i in range(0,9):
        selectedEdges = [(u,v) for (u,v,d) in G.edges(data=True) if d['level'] == i]
        selectedColors = [colors[i] for e in selectedEdges]
        nx.draw_networkx_edges(G,pos,edgelist=selectedEdges,width=edgeWidth[i],edge_color=selectedColors, alpha=0.5)