Question

通过使用matplotlib库，我需要在高速公路上附加标签上显示标签。

但是当我创建自己的代码时，它并没有按照我想要的方式显示。

我的代码如下：

import matplotlib.pyplot as plt
import json
import numpy as np
from shapely.geometry import LineString

def plot_line(ax, ob, t):
    COLOR = {
            True:  '#E2CB9A',
            False: '#ff3333'
    }
    x, y = ob.xy
    angle = 45
    ax.plot(x, y, color='#E2CB9A', alpha=0.7, linewidth=0.5, solid_capstyle='round', zorder=2)

fig = plt.figure()
ax = fig.gca()
left = -118.32753120000001
right = -118.1114868
bottom = 33.9548068
top = 34.1325272

hw = [{'id': 94264, 'full_name': 'San Diego Fwy', 'coordinates': '{"type":"MultiLineString","coordinates":[[[-118.170736,33.814337],[-118.170989,33.814375],[-118.17111,33.814382],[-118.171146,33.814384],[-118.17197,33.814399],[-118.174145,33.814394],[-118.174298,33.814395],[-118.176319,33.814409],[-118.180662,33.81438],[-118.181022,33.814393],[-118.181385,33.814419],[-118.181926,33.814491],[-118.182267,33.814564],[-118.182889,33.814705],[-118.183407,33.814856],[-118.184274,33.81516],[-118.184641,33.815297],[-118.184762,33.81534],[-118.184999,33.81543],[-118.186174,33.815882],[-118.187086,33.816271],[-118.187143,33.8163],[-118.187882,33.816708],[-118.188433,33.817028],[-118.189166,33.817541],[-118.189354,33.817685],[-118.190892,33.818911],[-118.191735,33.819569],[-118.192356,33.820013],[-118.193232,33.820601],[-118.193952,33.820957],[-118.195624,33.821788],[-118.198396,33.823196],[-118.198964,33.823478],[-118.202398,33.825216],[-118.203092,33.825526],[-118.203692,33.825767],[-118.204196,33.825934],[-118.204549,33.826047],[-118.204952,33.826148],[-118.205151,33.826198],[-118.205316,33.826239],[-118.205589,33.826305],[-118.205802,33.826356],[-118.206506,33.826508],[-118.206977,33.826584],[-118.207272,33.826618],[-118.207426,33.82663],[-118.207652,33.826641],[-118.207758,33.826648],[-118.208768,33.826693],[-118.209111,33.826701],[-118.209748,33.826686],[-118.210355,33.826649],[-118.210794,33.826608],[-118.211872,33.826435],[-118.21225,33.826356],[-118.212988,33.826188],[-118.213847,33.825973],[-118.214612,33.8258],[-118.215045,33.825698],[-118.215286,33.825646],[-118.215608,33.825595],[-118.215771,33.825564],[-118.215961,33.825538],[-118.216183,33.825505],[-118.216422,33.825482],[-118.216727,33.825464],[-118.217693,33.825442],[-118.222283,33.825385],[-118.22282,33.825397],[-118.223745,33.82541],[-118.225086,33.825476],[-118.225285,33.825483],[-118.22733,33.825586],[-118.227672,33.825603],[-118.227703,33.825604],[-118.228041,33.825623],[-118.228109,33.825627],[-118.228271,33.825636],[-118.228579,33.825653],[-118.229324,33.825694],[-118.229565,33.825707],[-118.229917,33.825726],[-118.230474,33.825757],[-118.233529,33.82594],[-118.234579,33.825952],[-118.235318,33.825961],[-118.236724,33.82595],[-118.241383,33.825938],[-118.241542,33.825941],[-118.241683,33.825942],[-118.242856,33.825929],[-118.244932,33.825939],[-118.245415,33.825929],[-118.245858,33.825933],[-118.246304,33.825937],[-118.247624,33.825948],[-118.247946,33.82598],[-118.248558,33.826089],[-118.249276,33.826279],[-118.249623,33.82639],[-118.24998,33.826532],[-118.250338,33.826698],[-118.250733,33.826918],[-118.25109,33.827147],[-118.251447,33.8274],[-118.251954,33.827836],[-118.252861,33.82876],[-118.25349,33.8294],[-118.254015,33.829935],[-118.255378,33.831323],[-118.255676,33.831626],[-118.255787,33.831739],[-118.255965,33.831921],[-118.257517,33.833508],[-118.258403,33.834414],[-118.259035,33.835063],[-118.259346,33.835382],[-118.259539,33.83558],[-118.260457,33.836501],[-118.261493,33.83761],[-118.262768,33.838887],[-118.263334,33.839474],[-118.263447,33.83959],[-118.264306,33.84048],[-118.264933,33.841109],[-118.265014,33.841191],[-118.265807,33.841988],[-118.266223,33.842414],[-118.266856,33.843086],[-118.267882,33.844148],[-118.269052,33.84528],[-118.270067,33.846191],[-118.270503,33.846567],[-118.270864,33.846834],[-118.274849,33.849573],[-118.277851,33.851602],[-118.278539,33.852088],[-118.280249,33.853348],[-118.280426,33.85347],[-118.281852,33.854645],[-118.281912,33.854703],[-118.281984,33.854768],[-118.282666,33.85539],[-118.2831,33.855779],[-118.283343,33.855999],[-118.283925,33.856474],[-118.28457,33.856946],[-118.284758,33.857074],[-118.28493,33.85719],[-118.285598,33.857577],[-118.285674,33.857619],[-118.286179,33.857854],[-118.286571,33.858021],[-118.287556,33.858434],[-118.289105,33.859066],[-118.289429,33.859187],[-118.289621,33.859256],[-118.289729,33.859298],[-118.290018,33.859394],[-118.290524,33.859541],[-118.291123,33.859676],[-118.291787,33.859808],[-118.292366,33.859882],[-118.292759,33.859906],[-118.293546,33.859927],[-118.294686,33.85995],[-118.29482,33.859945],[-118.298709,33.859914],[-118.299222,33.859913],[-118.299375,33.859913],[-118.304325,33.859908],[-118.304811,33.859907],[-118.307796,33.859904],[-118.308367,33.859914],[-118.308565,33.859921],[-118.308652,33.859924],[-118.309149,33.859952],[-118.309248,33.859962],[-118.309599,33.859997],[-118.309941,33.86004],[-118.309965,33.860043],[-118.310591,33.860122],[-118.311319,33.86025],[-118.311982,33.860388],[-118.313049,33.860657],[-118.313163,33.86069],[-118.313315,33.860734],[-118.313889,33.860906],[-118.314453,33.861075],[-118.316528,33.861705],[-118.317788,33.862083],[-118.318608,33.862328],[-118.32207,33.863375],[-118.326445,33.864706],[-118.326686,33.864777],[-118.328259,33.865238],[-118.32991,33.865727],[-118.330325,33.865855],[-118.330992,33.86606],[-118.331037,33.866071],[-118.331895,33.866332],[-118.332636,33.866557],[-118.334412,33.86709],[-118.334883,33.867225],[-118.335568,33.867421],[-118.336078,33.86758],[-118.336813,3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'lat': 34.0093469499053, 'lng': -118.38426323854}]

for i in hw:
    f = []
    # print(i[])
    co = json.loads(i["coordinates"])
    # print(co)
    for j in co["coordinates"][0]:
        p = tuple(j)
        f.append(p)
    line = f
    l = len(line)

    ang = np.arctan2(line[l - 1][1]-i["lat"], line[l - 1][0]-i["lng"])
    angle_data = np.rad2deg(ang)
    angle = ax.transData.transform_angles(np.array((angle_data,)), np.array([i["lng"], i["lat"]]).reshape((1, 2)))[0]

    ax.text(i["lng"], i["lat"], i["full_name"], fontsize=4, rotation=angle, rotation_mode='anchor')
    line = LineString(line)
    plot_line(ax, line, "primary")
plt.show()

请告诉我我做错了什么，以便我能以正确的方式做到。

我生成的图像如下：

高速公路标签未正确显示

0 个答案: