ee.ImageCollection.size

  • The size() function returns the number of elements (e.g., images) in an Earth Engine ImageCollection.

  • It takes one argument, the collection to count, and returns an integer representing the number of elements.

  • ee.ImageCollection.size() can be computationally intensive for large collections, potentially causing memory errors due to the need to generate all results for counting.

 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())