ee.FeatureCollection.aggregate_first

AI-generated Key Takeaways

• Aggregates over a collection, calculating the property value of the first object.

• Used with a FeatureCollection and a specified property (String).

• The aggregate_first method returns the value of the specified property for the first feature in the collection.

Aggregates over a given property of the objects in a collection, calculating the property value of the first object in the collection.

Usage	Returns
FeatureCollection.aggregate_first(property)

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('Fuel source for first power plant in the collection',
      fc.aggregate_first('fuel1'));  // Wind

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('Fuel source for first power plant in the collection:',
      fc.aggregate_first('fuel1').getInfo())  # Wind