如何使matplotlib-basemap轴的长度与另一个子图轴相等？

Question

在这个问题上的任何帮助都是非常感谢的。我在使用底图时遇到了一个子图问题。使用gridspec，我在matplotlib中创建了一个包含三个子图的图。我想把底图的纬度和经度轴的长度和其他两个子图的轴线画得一样。但是在我现在的代码中，两个子图的纬度轴的长度是相同的，而经度轴的长度是不同的。如何使底图和左下象限子图的经轴长度相等？有没有办法做到这一点？

下面是我的代码：

import pandas as pd
import matplotlib.pyplot as plt
from matplotlib.gridspec import GridSpec
from mpl_toolkits.basemap import Basemap

fig = plt.figure(figsize=(12,12))
gs = GridSpec(2, 2, width_ratios=[3, 1], height_ratios=[3, 1], hspace=0.1, wspace=0.1)
ax1 = fig.add_subplot(gs[0])

map1 = Basemap(projection = 'merc', resolution = 'l',
               lat_0 = 39.65, lon_0 = 27.5, area_thresh = 0.1,
               llcrnrlon = 24.75, llcrnrlat = 35.25, urcrnrlon = 31.0, urcrnrlat = 41.5, ax=ax1)
map1.fillcontinents(color = 'darkgrey', lake_color = 'lightskyblue')
map1.drawmapboundary(fill_color = 'lightskyblue')
map1.drawcoastlines(linewidth = 1.0, color = 'black')
map1.drawcountries(linewidth = 0.5, color = 'black')
ax2 = fig.add_subplot(gs[1])
ax2.set_ylim(35.25, 41.5)
ax3 = fig.add_subplot(gs[2])
ax3.set_xlim(24.75, 31)

for i, ax in enumerate(fig.axes):
        ax.tick_params(labelbottom=False, labelleft=False)
        ax.set_xlabel("")
        ax.set_ylabel("")

ax1.set_xlabel("Longitude (°)", labelpad=10)
ax1.set_ylabel("Latitude (°)", labelpad=10)
ax2.set_xlabel("Depth (km)", rotation=180, labelpad=10)
ax2.set_ylabel("Latitude (°)", labelpad=10)
ax3.set_xlabel("Longitude (°)", labelpad=10)
ax3.set_ylabel("Depth (km)", labelpad=10)

Answer 1

使用GridSpec并设置figsize=(12,12)会导致子图不能正确对齐。

我发现使用figsize=(6.3,8.12)生成的图与图对齐。

fig = plt.figure(figsize = (6.3, 8.12))
gs = GridSpec(2, 2, width_ratios=[3, 1], height_ratios=[3, 1], hspace=0.2, wspace=0.2)
ax1 = fig.add_subplot(gs[0])

map1 = Basemap(projection = 'merc', resolution = 'l',
               lat_0 = 39.65, lon_0 = 27.5, area_thresh = 0.1,
               llcrnrlon = 24.75, llcrnrlat = 35.25, urcrnrlon = 31.0, urcrnrlat = 41.5, ax=ax1)
map1.fillcontinents(color = 'darkgrey', lake_color = 'lightskyblue')
map1.drawmapboundary(fill_color = 'lightskyblue')
map1.drawcoastlines(linewidth = 1.0, color = 'black')
map1.drawcountries(linewidth = 0.5, color = 'black')
ax2 = fig.add_subplot(gs[1])
ax2.set_ylim(35.25, 41.5)
ax3 = fig.add_subplot(gs[2])
ax3.set_xlim(24.75, 31)

for i, ax in enumerate(fig.axes):
        ax.tick_params(labelbottom=False, labelleft=False)
        ax.set_xlabel("")
        ax.set_ylabel("")

ax1.set_xlabel("Longitude (°)", labelpad=10)
ax1.set_ylabel("Latitude (°)", labelpad=10)
ax2.set_xlabel("Depth (km)", rotation=180, labelpad=10)
ax2.set_ylabel("Latitude (°)", labelpad=10)
ax3.set_xlabel("Longitude (°)", labelpad=10)
ax3.set_ylabel("Depth (km)", labelpad=10)

​

​