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ee.FeatureCollection.first
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
從指定集合傳回第一個項目。
| 用量 | 傳回 |
|---|
FeatureCollection.first() | 元素 |
| 引數 | 類型 | 詳細資料 |
|---|
這個：collection | FeatureCollection | 要從中選取第一個項目的集合。 |
範例
程式碼編輯器 (JavaScript)
// A global power plant FeatureCollection.
var fc = ee.FeatureCollection('WRI/GPPD/power_plants');
print('The first feature (power plant) in the collection', fc.first());
Python 設定
請參閱
Python 環境頁面，瞭解 Python API 和如何使用 geemap 進行互動式開發。
import ee
import geemap.core as geemap
Colab (Python)
from pprint import pprint
# A global power plant FeatureCollection.
fc = ee.FeatureCollection('WRI/GPPD/power_plants')
print('The first feature (power plant) in the collection:')
pprint(fc.first().getInfo())
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上次更新時間：2025-07-26 (世界標準時間)。
[null,null,["上次更新時間：2025-07-26 (世界標準時間)。"],[[["\u003cp\u003e\u003ccode\u003efirst()\u003c/code\u003e operates on a FeatureCollection and returns the first element within that collection.\u003c/p\u003e\n"],["\u003cp\u003eThis method is useful for quickly accessing and examining a representative entry from a FeatureCollection.\u003c/p\u003e\n"],["\u003cp\u003eExamples demonstrate usage in both JavaScript and Python environments, including Colab with \u003ccode\u003egeemap\u003c/code\u003e.\u003c/p\u003e\n"]]],["The core function retrieves the first element from a `FeatureCollection`. It requires a `FeatureCollection` as input. The function `first()` returns the initial `Element` within the collection. In JavaScript, `fc.first()` accesses the first entry, while in Python, using `pprint(fc.first().getInfo())` provides detailed output. The provided examples utilize a global power plant dataset ('WRI/GPPD/power_plants') to demonstrate how to retrieve the initial feature.\n"],null,["# ee.FeatureCollection.first\n\nReturns the first entry from a given collection.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------|---------|\n| FeatureCollection.first`()` | Element |\n\n| Argument | Type | Details |\n|--------------------|-------------------|------------------------------------------------------|\n| this: `collection` | FeatureCollection | The collection from which to select the first entry. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// A global power plant FeatureCollection.\nvar fc = ee.FeatureCollection('WRI/GPPD/power_plants');\n\nprint('The first feature (power plant) in the collection', fc.first());\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\nfrom pprint import pprint\n\n# A global power plant FeatureCollection.\nfc = ee.FeatureCollection('WRI/GPPD/power_plants')\n\nprint('The first feature (power plant) in the collection:')\npprint(fc.first().getInfo())\n```"]]
