Add a 1-D Array to each feature in a collection by combining a list of properties for each feature into a 1-D Array. All of the properties must be numeric values. If a feature doesn't contain all of the named properties, or any of them aren't numeric, the feature will be dropped from the resulting collection.
Usage | Returns | FeatureCollection.makeArray(properties, name) | FeatureCollection |
Argument | Type | Details | this: collection | FeatureCollection | The input collection from which properties will be selected. |
properties | List | The properties to select. |
name | String, default: "array" | The name of the new array property. |
Examples
Code Editor (JavaScript)
// FeatureCollection of power plants in Belgium.
var fc = ee.FeatureCollection('WRI/GPPD/power_plants')
.filter('country_lg == "Belgium"');
// A list of feature properties to combine into an array
// (power generation by year).
var properties = ['gwh_2013', 'gwh_2014', 'gwh_2015', 'gwh_2016'];
// Add array of power-generation-by-year property to features.
fc = fc.makeArray(properties, 'gwh_by_year');
print('FeatureCollection with array of selected properties added', fc);
print('See example of new "gwh_by_year" property', fc.first().toDictionary());