山蟒的 3D 曲面图答案

【问题标题】：3D surface plot of a mountain python山蟒的 3D 曲面图
【发布时间】：2019-05-12 07:36:53
【问题描述】：

我正在尝试重现代表山脉轮廓的 3D 曲面图。我知道我必须创建一个 csv 文件来读取代码，并且我正在尝试从谷歌地球获取坐标。有人可以建议一种方法吗？有没有做这种工作的代码？我正在尝试遵循此代码：

# library
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import pandas as pd
import seaborn as sns

# Get the data (csv file is hosted on the web)
url = 'https://python-graph-gallery.com/wp-content/uploads/volcano.csv'
data = pd.read_csv(url)

# Transform it to a long format
df=data.unstack().reset_index()
df.columns=["X","Y","Z"]

# And transform the old column name in something numeric
df['X']=pd.Categorical(df['X'])
df['X']=df['X'].cat.codes

# Make the plot
fig = plt.figure()
ax = fig.gca(projection='3d')
ax.plot_trisurf(df['Y'], df['X'], df['Z'], cmap=plt.cm.viridis, 
linewidth=0.2)
plt.show()

# to Add a color bar which maps values to colors.
surf=ax.plot_trisurf(df['Y'], df['X'], df['Z'], cmap=plt.cm.viridis, 
linewidth=0.2)
fig.colorbar( surf, shrink=0.5, aspect=5)
plt.show()

# Rotate it
ax.view_init(30, 45)
plt.show()

# Other palette
ax.plot_trisurf(df['Y'], df['X'], df['Z'], cmap=plt.cm.jet, linewidth=0.01)
plt.show()

谢谢大家

【问题讨论】：

标签： python matplotlib google-earth surface mplot3d

【解决方案1】：

问题是由于 ssl 身份验证中的错误，请将您的脚本头替换为：

from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import pandas as pd
import seaborn as sns
import requests
from io import StringIO

# Get the data (csv file is hosted on the web)
url = 'https://python-graph-gallery.com/wp-content/uploads/volcano.csv'
r1 = requests.get(url, verify=False)
data = pd.read_csv(StringIO(r1.text))  # works
...

在此代码中，ssl 证书不检查。

【讨论】：