AI-generated Key Takeaways
-
Use the
selectfunction to choose specific properties from a FeatureCollection. -
You can select multiple properties and optionally rename them.
-
The function allows you to remove the geometry from the resulting FeatureCollection if needed.
Returns the feature collection with selected properties.
| Usage | Returns |
|---|---|
FeatureCollection.
select
(propertySelectors, newProperties
, retainGeometry
)
|
FeatureCollection |
| Argument | Type | Details |
|---|---|---|
|
this:
featurecollection
|
FeatureCollection | The FeatureCollection instance. |
propertySelectors
|
List<String> | A list of names or regexes specifying the attributes to select. |
newProperties
|
List<String>, optional | A list of new names for the output properties. Must match the number of properties selected. |
retainGeometry
|
Boolean, optional | When false, the result will have a NULL geometry. Defaults to true. |
Examples
Code Editor (JavaScript)
// FeatureCollection of power plants in Belgium. var fc = ee . FeatureCollection ( 'WRI/GPPD/power_plants' ) . filter ( 'country_lg == "Belgium"' ); // Select a single property. var singleProp = fc . select ( 'fuel1' ); print ( 'Single property selected' , singleProp . first ()); // Select multiple properties. var multiProp = fc . select ([ 'fuel1' , 'capacitymw' ]); print ( 'Multiple properties selected' , multiProp . first ()); // Select multiple properties and rename them. var multiPropRename = fc . select ({ propertySelectors : [ 'fuel1' , 'capacitymw' ], newProperties : [ 'Fuel_1' , 'Capacity_MW' ] }); print ( 'Multiple properties selected, renamed' , multiPropRename . first ()); // Select multiple properties, remove geometry. var multiPropNoGeom = fc . select ({ propertySelectors : [ 'fuel1' , 'capacitymw' ], retainGeometry : false }); print ( 'Multiple properties selected, geometry removed' , multiPropNoGeom . first ());
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"' ) # Select a single property. single_prop = fc . select ( 'fuel1' ) display ( 'Single property selected:' , single_prop . first ()) # Select multiple properties. multi_prop = fc . select ([ 'fuel1' , 'capacitymw' ]) display ( 'Multiple properties selected:' , multi_prop . first ()) # Select multiple properties and rename them. multi_prop_rename = fc . select ( ** { 'propertySelectors' : [ 'fuel1' , 'capacitymw' ], 'newProperties' : [ 'Fuel_1' , 'Capacity_MW' ] }) display ( 'Multiple properties selected, renamed:' , multi_prop_rename . first ()) # Select multiple properties, remove geometry. multi_prop_no_geom = fc . select ( ** { 'propertySelectors' : [ 'fuel1' , 'capacitymw' ], 'retainGeometry' : False }) display ( 'Multiple properties selected, geometry removed:' , multi_prop_no_geom . first ())
