ee.Number.evaluate

從伺服器非同步擷取這個物件的值，並傳遞至提供的回呼函式。

用量傳回
Number.evaluate(callback)
引數類型詳細資料
這個：computedobjectComputedObjectComputedObject 例項。
callback函式伺服器傳回答案時呼叫的函式，格式為 function(success, failure)。如果要求成功，success 引數會包含評估結果。如果要求失敗，失敗引數會包含錯誤訊息。

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.Number object.
var numberServer = ee.Number(10.3);

// Use evaluate to transfer server-side number to the client.
numberServer.evaluate(function(numberClient) {
  print('Client-side primitive data type', typeof numberClient);  // number
  print('Client-side number', numberClient);  // 10.3
  print('Client-side number used in expression', numberClient + 10);  // 20.3
});

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)

# The Earth Engine Python client library does not have an evaluate method for
# asynchronous evaluation of ee.Number objects.
# Use ee.Number.getInfo() instead.