ee.Date.getInfo

從伺服器擷取這個物件的值。

如果未提供任何回呼函式，系統會同步發出要求。如果提供回呼，系統會以非同步方式發出要求。

建議使用非同步模式，因為同步模式會在等待伺服器時停止所有其他程式碼 (例如 EE 程式碼編輯器使用者介面)。如要發出非同步要求，建議使用 evaluate()，而非 getInfo()。

傳回這個物件的計算值。

用量傳回
Date.getInfo(callback)物件
引數類型詳細資料
這個：computedobjectComputedObjectComputedObject 例項。
callback函式 (選用)選用回呼。如未提供，系統會同步發出呼叫。

範例

程式碼編輯器 (JavaScript)

/**
 * WARNING: this function transfers data from Earth Engine servers to the
 * client. Doing so can negatively affect request processing and client
 * performance. Server-side options should be used whenever possible.
 * Learn more about the distinction between server and client:
 * https://developers.google.com/earth-engine/guides/client_server
 */

// A server-side ee.Date object.
var dateServer = ee.Date('2021-4-30');

// Use getInfo to transfer server-side date to the client. The result is
// an object with keys "type" and "value" where "value" is milliseconds since
// Unix epoch.
var dateClient = dateServer.getInfo();
print('Client-side date is an object', typeof dateClient);
print('Object keys include "type" and "value"', Object.keys(dateClient));
print('"value" is milliseconds since Unix epoch', dateClient.value);
print('Client-side date in JS Date constructor', new Date(dateClient.value));

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)

"""
WARNING: this function transfers data from Earth Engine servers to the
client. Doing so can negatively affect request processing and client
performance. Server-side options should be used whenever possible.
Learn more about the distinction between server and client:
https://developers.google.com/earth-engine/guides/client_server
"""
from datetime import datetime

# A server-side ee.Date object.
date_server = ee.Date('2021-4-30')

# Use getInfo to transfer server-side date to the client. The result is
# a dictionary with keys "type" and "value" where "value" is milliseconds since
# Unix epoch.
date_client = date_server.getInfo()
print('Client-side date is a dictionary:', type(date_client))
print('Dictionary keys include "type" and "value":', date_client.keys())
print('"value" is milliseconds since Unix epoch:', date_client['value'])
print('Client-side date in Python:',
      datetime.fromtimestamp(date_client['value'] / 1000))