ee.ImageCollection.size

  • The size() method returns the number of elements in a collection.

  • Using size() on large or complex collections can consume significant time and memory, potentially causing errors.

  • The method is used with ImageCollection.size() and returns an Integer.

  • Examples are provided in both JavaScript and Python.

 Returns the number of elements in the collection.

UsageReturns
ImageCollection.size()Integer
ArgumentTypeDetails
this: collectionFeatureCollectionThe collection to count.

Examples

Code Editor (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 setup

See the Python Environment page for information on the Python API and using geemap for interactive development.

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())