Cartopy中如何设置图的比例

xiongxiong1999

今天刚用Cartopy，按照教程中的例子将代码复制粘贴，检验一下是否安装好了。然后发现出的图比例有问题。求解决方法
警告如下：
UserWarning: This figure includes Axes that are not compatible with tight_layout, so results might be incorrect.
  warnings.warn("This figure includes Axes that are not compatible "
C:\Users\asus\AppData\Local\Programs\Python\Python36-32\lib\site-packages\matplotlib\tight_layout.py:177: UserWarning: The left and right margins cannot be made large enough to accommodate all axes decorations.
  warnings.warn('The left and right margins cannot be made large '
C:\Users\asus\AppData\Local\Programs\Python\Python36-32\lib\site-packages\matplotlib\tight_layout.py:182: UserWarning: The bottom and top margins cannot be made large enough to accommodate all axes decorations.
  warnings.warn('The bottom and top margins cannot be made large '

代码
import numpy as np
import matplotlib.pyplot as plt
import cartopy.crs as ccrs
import cartopy.feature as cfeature

# Load the border data, CN-border-La.dat is downloaded from
# http://gmt-china.org/datas/CN-border-La.dat
with open('CN-border-La.dat') as src:
    context = src.read()
    blocks = [cnt for cnt in context.split('>') if len(cnt) > 0]
    borders = [np.fromstring(block, dtype=float, sep=' ') for block in blocks]
# Set figure size
fig = plt.figure(figsize=[10, 8])
# Set projection and plot the main figure
ax = plt.axes(projection=ccrs.LambertConformal(central_latitude=90,
                                               central_longitude=105))
# Add ocean, land, rivers and lakes
ax.add_feature(cfeature.OCEAN.with_scale('50m'))
ax.add_feature(cfeature.LAND.with_scale('50m'))
ax.add_feature(cfeature.RIVERS.with_scale('50m'))
ax.add_feature(cfeature.LAKES.with_scale('50m'))
# Plot border lines
for line in borders:
    ax.plot(line[0::2], line[1::2], '-', color='gray',
            transform=ccrs.Geodetic())
# Plot gridlines
ax.gridlines(linestyle='--')
# Set figure extent
ax.set_extent([80, 130, 13, 55])
# Plot South China Sea as a subfigure
sub_ax = fig.add_axes([0.741, 0.11, 0.14, 0.155],
                      projection=ccrs.LambertConformal(central_latitude=90,
                                                       central_longitude=115))
# Add ocean, land, rivers and lakes
sub_ax.add_feature(cfeature.OCEAN.with_scale('50m'))
sub_ax.add_feature(cfeature.LAND.with_scale('50m'))
sub_ax.add_feature(cfeature.RIVERS.with_scale('50m'))
sub_ax.add_feature(cfeature.LAKES.with_scale('50m'))
# Plot border lines
for line in borders:
    sub_ax.plot(line[0::2], line[1::2], '-', color='gray',
                transform=ccrs.Geodetic())
# Set figure extent
sub_ax.set_extent([105, 125, 0, 25])
# Show figure
plt.show()

风往北吹

安装有问题吧，我微调了一下就好了啊

xiongxiong1999

风往北吹 发表于 2019-8-8 13:59
安装有问题吧，我微调了一下就好了啊

请问您是如何解决的？安装我都挺顺利的，没找出什么毛病。谢谢了

风往北吹

xiongxiong1999 发表于 2019-8-8 15:40
请问您是如何解决的？安装我都挺顺利的，没找出什么毛病。谢谢了

https://github.com/matplotlib/matplotlib/issues/5456。根据提醒把matplotlib重新安装到最新的版本试试吧。

xiongxiong1999

风往北吹 发表于 2019-8-8 21:37
https://github.com/matplotlib/matplotlib/issues/5456。根据提醒把matplotlib重新安装到最新的版本试试 ...

十分感谢！！

lzh123

你提供的警告信息是由于图中包含不兼容tight_layout的Axes而导致的。这个警告不会影响图像的比例，但是可能会影响布局。如果你想要解决这个问题，可以尝试调整Axes的大小或位置，或者使用subplots_adjust()方法来调整子图之间的间距。可以尝试使用set_aspect()方法来设置Axes的纵横比。例如，如果你想要一个正方形的图像，可以使用ax.set_aspect(‘equal’)。如果你想要一个特定的纵横比，可以使用ax.set_aspect(‘auto’)和ax.set_box_aspect()方法来设置。1