ee.ImageCollection.size

傳回集合中的元素數量。

用量	傳回
ImageCollection.size()	整數

引數	類型	詳細資料
這個：collection	FeatureCollection	要計算的集合。

範例

程式碼編輯器 (JavaScript)

// Note: ee.ImageCollection.size may take a lot of time and memory to run,
// since it must generate all of the results in order to count them. Large
// collections and/or complex computations can produce memory limitation
// errors.

// A Landsat 8 TOA image collection (1 year of images at a specific point).
var col = ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA')
  .filterBounds(ee.Geometry.Point(-90.70, 34.71))
  .filterDate('2020-01-01', '2021-01-01');

// Get the number of images in the collection.
print('Number of images', col.size());

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)

# Note: ee.ImageCollection.size may take a lot of time and memory to run,
# since it must generate all of the results in order to count them. Large
# collections and/or complex computations can produce memory limitation
# errors.

# A Landsat 8 TOA image collection (1 year of images at a specific point).
col = ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA').filterBounds(
    ee.Geometry.Point(-90.70, 34.71)
    ).filterDate('2020-01-01', '2021-01-01')

# Get the number of images in the collection.
print('Number of images', col.size().getInfo())