ee.FeatureCollection.aggregate_count_distinct

Aggregates over a given property of the objects in a collection, calculating the number of distinct values for the selected property.

Usage	Returns
FeatureCollection.aggregate_count_distinct(property)	Number

Argument	Type	Details
this: collection	FeatureCollection	The collection to aggregate over.
property	String	The 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 distinct power plant fuel sources',
      fc.aggregate_count_distinct('fuel1'));  // 7