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我有一个 Dijsktra 算法,我将其应用于从开放街道地图获得的图表。它适用于单个图表。

但是当我绘制两个相邻城市的图时,相同的算法在图之间找不到任何方法.. 我注意到连接两个城市的道路没有被任何 osmid 识别。:-/

我错过了什么吗?

class Pathfinding(nx.MultiDiGraph):

    def __init__(self, incomin_graphe_data = None, **attr):
        nx.MultiDiGraph.__init__(self,incomin_graphe_data,**attr)

    def dijsktra(self,depart,final):

        inf = float("inf")
        F ,ds, s= set(), None ,None
        D = {i: inf for i in self.nodes}
        D[ depart ] = 0
        pred = {}
        priority_queue = [(0 , depart)]

        while s != final:

            ds, s = heapq.heappop(priority_queue)
            F.add(s)
            for y in self.neighbors(s):    

                w = self[s][y][0]['lenght']
                dy = ds + w

                if y not in F :
                    if D[y] > dy :
                        D[y] = dy
                        heapq.heappush(priority_queue,(dy,y))
                        pred[y] = s

        path = [s]
        while s != depart:
            s = pred[s]
            path.append(s)
        return path

我使用的是 Dijkstra,下面的类型图是 MultiDiGraph。

add_Aubervilliers = "Aubervilliers, France" 
Graphe_Aubervilliers = ox.graph_from_place(add_Aubervilliers, network_type='drive')

add_Saint_denis = " Saint denis, France "
Graphe_Saint_denis = ox.graph_from_place(add_Saint_denis, network_type = "drive") 
Graph_Paris_Auber = nx.compose_all([ Graphe_Saint_denis, Graphe_Aubervilliers ])

我还尝试了以下命令

add_Saint_denis = " Saint denis, France "
Graphe_Saint_denis = ox.graph_from_adress(add_Saint_denis, infrastructure='way['highway']') 

但它给出了同样的问题......我错过了什么吗?

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1 回答 1

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您只需要设置truncate_by_edge为 True。

于 2021-12-24T08:30:57.077 回答