ee.FeatureCollection.select

從集合中的每個特徵選取屬性。您也可以只使用字串引數呼叫這個函式，這些引數都會解讀為 propertySelectors (varargs)。

傳回具有所選屬性的特徵集合。

用量	傳回
FeatureCollection.select(propertySelectors, newProperties, retainGeometry)	FeatureCollection

引數	類型	詳細資料
這個：featurecollection	FeatureCollection	FeatureCollection 執行個體。
propertySelectors	List<String>	指定要選取屬性的名稱或正則運算式清單。
newProperties	List<String> (選用)	輸出屬性的新名稱清單。必須與所選房源數量相符。
retainGeometry	布林值 (選填)	如果為 false，結果會包含 NULL 幾何圖形。預設為 true。

範例

程式碼編輯器 (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());

Python 設定

請參閱 Python 環境頁面，瞭解 Python API 和如何使用 geemap 進行互動式開發。

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')
print('Single property selected:', single_prop.first().getInfo())

# Select multiple properties.
multi_prop = fc.select(['fuel1', 'capacitymw'])
print('Multiple properties selected:', multi_prop.first().getInfo())

# Select multiple properties and rename them.
multi_prop_rename = fc.select(**{
    'propertySelectors': ['fuel1', 'capacitymw'],
    'newProperties': ['Fuel_1', 'Capacity_MW']
    })
print('Multiple properties selected, renamed:',
      multi_prop_rename.first().getInfo())

# Select multiple properties, remove geometry.
multi_prop_no_geom = fc.select(**{
    'propertySelectors': ['fuel1', 'capacitymw'],
    'retainGeometry': False
    })
print('Multiple properties selected, geometry removed:',
      multi_prop_no_geom.first().getInfo())