公告:所有在
2025 年 4 月 15 日之前注册使用 Earth Engine 的非商业项目都必须
验证是否符合非商业性质的资格条件,才能继续使用 Earth Engine。
Python 版 Earth Engine 使用入门
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本快速入门将以互动方式介绍如何使用 Earth Engine Python 接口可视化和分析地理空间数据。
准备工作
注册或创建 Google Cloud 项目;系统会提示您完成以下步骤。如果您已注册有 Earth Engine 访问权限的项目,请跳至下一部分。
笔记本设置
借助 Jupyter 笔记本,您可以使用 Earth Engine 并以交互方式探索结果。最快的上手方式是使用 Google Colab 笔记本中的笔记本。您可以
打开新的笔记本,然后将以下代码块复制到各个单元格中,也可以使用预先填充的
Earth Engine Python 快速入门笔记本。
- 导入 Earth Engine 和 geemap 库。
import ee
import geemap.core as geemap
- 对 Earth Engine 服务进行身份验证和初始化。按照随即显示的提示完成身份验证。请务必将 PROJECT_ID 替换为您为此快速入门设置的项目的名称。
ee.Authenticate()
ee.Initialize(project='PROJECT_ID')
将光栅数据添加到地图
- 加载指定时间段内的气候数据并显示其元数据。
jan_2023_climate = (
ee.ImageCollection('ECMWF/ERA5_LAND/MONTHLY_AGGR')
.filterDate('2023-01', '2023-02')
.first()
)
jan_2023_climate
- 实例化地图对象,并将温度带添加为具有特定可视化属性的图层。显示地图。
m = geemap.Map(center=[30, 0], zoom=2)
vis_params = {
'bands': ['temperature_2m'],
'min': 229,
'max': 304,
'palette': 'inferno',
}
m.add_layer(jan_2023_climate, vis_params, 'Temperature (K)')
m
向地图添加矢量数据
- 创建一个包含三个城市点的矢量数据对象。
cities = ee.FeatureCollection([
ee.Feature(ee.Geometry.Point(10.75, 59.91), {'city': 'Oslo'}),
ee.Feature(ee.Geometry.Point(-118.24, 34.05), {'city': 'Los Angeles'}),
ee.Feature(ee.Geometry.Point(103.83, 1.33), {'city': 'Singapore'}),
])
cities
- 将城市位置添加到地图并重新显示。
m.add_layer(cities, name='Cities')
m
提取数据并绘制图表
- 导入 Altair 图表库。
%pip install -q --upgrade altair
import altair as alt
- 将这三个城市的气候数据提取为 pandas DataFrame。
city_climates = jan_2023_climate.reduceRegions(cities, ee.Reducer.first())
city_climates_dataframe = ee.data.computeFeatures(
{'expression': city_climates, 'fileFormat': 'PANDAS_DATAFRAME'}
)
city_climates_dataframe
- 将各个城市的温度绘制为条形图。
alt.Chart(city_climates_dataframe).mark_bar(size=100).encode(
alt.X('city:N', sort='y', axis=alt.Axis(labelAngle=0), title='City'),
alt.Y('temperature_2m:Q', title='Temperature (K)'),
tooltip=[
alt.Tooltip('city:N', title='City'),
alt.Tooltip('temperature_2m:Q', title='Temperature (K)'),
],
).properties(title='January 2023 temperature for selected cities', width=500)
后续步骤
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-25。
[null,null,["最后更新时间 (UTC):2025-07-25。"],[[["\u003cp\u003eThis quickstart provides an interactive introduction to visualizing and analyzing geospatial data using the Earth Engine Python interface within a Jupyter notebook environment like Google Colab.\u003c/p\u003e\n"],["\u003cp\u003eUsers will learn to add both raster and vector data to an interactive map, visualizing climate data and city locations as examples.\u003c/p\u003e\n"],["\u003cp\u003eThe guide demonstrates data extraction and charting by retrieving climate data for specific cities and creating a bar chart using the Altair library.\u003c/p\u003e\n"],["\u003cp\u003eBefore starting, users need a Google Cloud Project registered for Earth Engine access, and the quickstart provides instructions for setting one up.\u003c/p\u003e\n"],["\u003cp\u003eFurther learning resources on Earth Engine objects, processing environments, machine learning capabilities, and data export to BigQuery are linked at the end.\u003c/p\u003e\n"]]],[],null,["# Get started with Earth Engine for Python\n\n|----------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------|\n| [Run in Google Colab](https://colab.research.google.com/github/google/earthengine-community/blob/master/guides/linked/generated/quickstart_python.ipynb) | [View source on GitHub](https://github.com/google/earthengine-community/blob/master/guides/linked/generated/quickstart_python.ipynb) |\n\nThis quickstart will give you an interactive introduction to visualizing and\nanalyzing geospatial data with the Earth Engine Python interface.\n\nBefore you begin\n----------------\n\n\n[Register or create](https://console.cloud.google.com/earth-engine) a Google Cloud\nProject; you'll be prompted to complete the following steps. If you already have a project\nregistered for Earth Engine access, skip to the next section.\n\n- Select the project's purpose: commercial or noncommercial.\n- If the purpose is noncommercial, select a project type.\n- Create a new Google Cloud project or select an existing project.\n- If the purpose is commercial, verify or set up billing for your project.\n- Confirm your project information. \n\n **Note:** If you don't plan to keep the resources that you create\n in this procedure, create a project instead of selecting an existing project. After you finish\n these steps, you can\n [delete the project](https://cloud.google.com/resource-manager/docs/creating-managing-projects#shutting_down_projects),\n removing all resources owned by the project.\n\nNotebook setup\n--------------\n\nJupyter notebooks allow you to use Earth Engine and explore results interactively. The quickest way to get started is with a notebook in Google Colab notebook. You can either [**open a new notebook**](https://colab.new/) and copy the following code chunks into individual cells or use the prefilled [**Earth Engine Python Quickstart notebook**](https://colab.sandbox.google.com/github/google/earthengine-community/blob/master/guides/linked/generated/quickstart_python.ipynb).\n\n1. Import the Earth Engine and geemap libraries. \n\n ```python\n import ee\n import geemap.core as geemap\n ```\n\n\n2. Authenticate and initialize the Earth Engine service. Follow the resulting prompts to complete authentication. Be sure to replace PROJECT_ID with the name of the project you set up for this quickstart. \n\n ```python\n ee.Authenticate()\n ee.Initialize(project='PROJECT_ID')\n ```\n\nAdd raster data to a map\n------------------------\n\n\n1. Load climate data for a given period and display its metadata. \n\n ```python\n jan_2023_climate = (\n ee.ImageCollection('ECMWF/ERA5_LAND/MONTHLY_AGGR')\n .filterDate('2023-01', '2023-02')\n .first()\n )\n jan_2023_climate\n ```\n\n\n2. Instantiate a map object and add the temperature band as a layer with specific visualization properties. Display the map. \n\n ```python\n m = geemap.Map(center=[30, 0], zoom=2)\n\n vis_params = {\n 'bands': ['temperature_2m'],\n 'min': 229,\n 'max': 304,\n 'palette': 'inferno',\n }\n m.add_layer(jan_2023_climate, vis_params, 'Temperature (K)')\n m\n ```\n\nAdd vector data to a map\n------------------------\n\n1. Create a vector data object with points for three cities. \n\n ```python\n cities = ee.FeatureCollection([\n ee.Feature(ee.Geometry.Point(10.75, 59.91), {'city': 'Oslo'}),\n ee.Feature(ee.Geometry.Point(-118.24, 34.05), {'city': 'Los Angeles'}),\n ee.Feature(ee.Geometry.Point(103.83, 1.33), {'city': 'Singapore'}),\n ])\n cities\n ```\n\n\u003c!-- --\u003e\n\n2. Add the city locations to the map and redisplay it. \n\n ```python\n m.add_layer(cities, name='Cities')\n m\n ```\n\nExtract and chart data\n----------------------\n\n1. Import the Altair charting library. \n\n ```python\n %pip install -q --upgrade altair\n import altair as alt\n ```\n\n\n2. Extract the climate data for the three cities as a pandas DataFrame. \n\n ```python\n city_climates = jan_2023_climate.reduceRegions(cities, ee.Reducer.first())\n\n city_climates_dataframe = ee.data.computeFeatures(\n {'expression': city_climates, 'fileFormat': 'PANDAS_DATAFRAME'}\n )\n city_climates_dataframe\n ```\n\n\u003c!-- --\u003e\n\n3. Plot the temperature for the cities as a bar chart. \n\n ```python\n alt.Chart(city_climates_dataframe).mark_bar(size=100).encode(\n alt.X('city:N', sort='y', axis=alt.Axis(labelAngle=0), title='City'),\n alt.Y('temperature_2m:Q', title='Temperature (K)'),\n tooltip=[\n alt.Tooltip('city:N', title='City'),\n alt.Tooltip('temperature_2m:Q', title='Temperature (K)'),\n ],\n ).properties(title='January 2023 temperature for selected cities', width=500)\n ```\n\nWhat's next\n-----------\n\n- Learn about analyzing data with Earth Engine's [objects and methods](/earth-engine/guides/objects_methods_overview).\n- Learn about Earth Engine's [processing environments](/earth-engine/guides/processing_environments).\n- Learn about Earth Engine's [machine learning capabilities](/earth-engine/guides/machine-learning).\n- Learn how to [export your computation results to BigQuery](/earth-engine/guides/exporting_to_bigquery)."]]