ee.FeatureCollection.aggregate_count

  • Aggregates the count of non-null values for a specified property within a FeatureCollection.

  • It requires a FeatureCollection and the name of the property to count.

  • The result is a single number representing the total count of non-null values for that property.

  • Examples demonstrate its use in both JavaScript and Python environments.

 Aggregates over a given property of the objects in a collection, calculating the number of non-null values of the property.

UsageReturns
FeatureCollection.aggregate_count(property)Number
ArgumentTypeDetails
this: collectionFeatureCollectionThe collection to aggregate over.
propertyStringThe property to use from each element of the collection.

Examples

Code Editor (JavaScript)

// FeatureCollection of power plants in Belgium.
var fc = ee.FeatureCollection('WRI/GPPD/power_plants')
             .filter('country_lg == "Belgium"');

print('Number of non-null values for the fuel1 property',
      fc.aggregate_count('fuel1'));  // 66

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)

# FeatureCollection of power plants in Belgium.
fc = ee.FeatureCollection('WRI/GPPD/power_plants').filter(
    'country_lg == "Belgium"')

print('Number of non-null values for the fuel1 property:',
      fc.aggregate_count('fuel1').getInfo())  # 66