python - 如何纠正反向 basemap 图中错误的刻度标签位置

Question

我正在尝试使用 basemap 绘制天体区域。当我反转 x 轴 (RA) 时，刻度标 checkout 现在错误的一侧。怎么解决？

from mpl_toolkits.basemap import Basemap    
import pylab as pl
width = 250000
m = Basemap(width=width, height=width, projection='aeqd',
            lat_0=57.1, lon_0=35.2)
m.drawmeridians(np.arange(32,37.8,1),labels=[True]*5)
m.drawparallels(np.arange(56,58,0.5),labels=[True]*5)

pl.gca().invert_xaxis()
pl.show()

Answer 1

要正确绘制平行线的标签，需要使用以下代码行来代替相关代码:

m.drawparallels(np.arange(56,58,0.5), ha= 'right', labels=[0, 1, 0, 0]) # for labels on left side
m.drawparallels(np.arange(56,58,0.5), ha= 'left', labels=[1, 0, 0, 0])  # for labels on right side

输出将是:

完整代码:

from mpl_toolkits.basemap import Basemap    
import numpy as np
from matplotlib import pyplot as plt

width = 250000
m = Basemap(width=width, height=width, projection='aeqd',
            lat_0=57.1, lon_0=35.2)
m.drawmeridians(np.arange(32,37.8,1), labels=[0, 0, 1, 1])
m.drawparallels(np.arange(56,58,0.5), ha= 'right', labels=[0, 1, 0, 0]) # for labels on left side
m.drawparallels(np.arange(56,58,0.5), ha= 'left', labels=[1, 0, 0, 0])  # for labels on right side
plt.gca().invert_xaxis()
plt.show()

编辑

要启用使用 Google Colab 运行代码，请按照此 Gist 操作。