Create NetworkX maps of Chinese cities

create_osm_nx_map.ipynb

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    "# Create maps of Chinese cities with OSMnx\n",
    "\n",
    "We focus on 3 main cities/regions : \n",
    "\n",
    "* HK/Shenzhen\n",
    "* Shanghai \n",
    "* Chengdu\n",
    "\n",
    "\n",
    "\n"
   ]
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   "source": [
    "# search locations at https://nominatim.openstreetmap.org/\n",
    "# ref : https://www.dengxiangxing.com/post/35986\n",
    "\n",
    "\n",
    "import osmnx as ox\n",
    "\n",
    "dist = 3000\n",
    "places = [\n",
    "    ('shanghai', (31.2253441,121.4888922), 'drive_service')\n",
    "    ('shenzhen', (22.5442673,114.0545327), 'drive_service')\n",
    "    ('chengdu', (30.6765553,104.0612783), 'drive_service')\n",
    "     ]\n",
    "\n",
    "for name, point, nt in places:\n",
    "\n",
    "    # get the network\n",
    "    G = ox.graph_from_point(point, distance=dist, distance_type ='bbox', network_type=nt, truncate_by_edge=True)\n",
    "    G_projected = ox.project_graph(G)\n",
    "\n",
    "    # plot it: nodes in this network are street junctions\n",
    "    fig, ax = ox.plot_graph(G_projected, node_size=8, node_color='k', node_zorder=2,\n",
    "                        edge_color='gray', edge_linewidth=0.5, edge_alpha=0.8)\n"
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