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2025 年 4 月 15 日之前注册使用 Earth Engine 的非商业项目都必须
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ee.FeatureCollection.distinct
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
从集合中移除重复项。请注意,系统会根据所选属性的序列化形式的强哈希值来确定重复项。
用法 | 返回 |
---|
FeatureCollection.distinct(properties) | FeatureCollection |
参数 | 类型 | 详细信息 |
---|
此:collection | FeatureCollection | 从中选择对象的输入集合。 |
properties | 对象 | 用于比较的属性名称或属性名称列表。可以添加“.geo”属性来比较对象几何图形。 |
示例
代码编辑器 (JavaScript)
// FeatureCollection of power plants in Belgium.
var fc = ee.FeatureCollection('WRI/GPPD/power_plants')
.filter('country_lg == "Belgium"');
print('FeatureCollection of power plants in Belgium', fc);
// Remove duplicate features according to property values.
print('Distinct based on a single property', fc.distinct('fuel1'));
print('Distinct based on two properties', fc.distinct(['fuel1', 'source']));
print('Distinct based on geometry', fc.distinct('.geo'));
Python 设置
如需了解 Python API 和如何使用 geemap
进行交互式开发,请参阅
Python 环境页面。
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('FeatureCollection of power plants in Belgium:', fc.getInfo())
# Remove duplicate features according to property values.
print('Distinct based on a single property:', fc.distinct('fuel1').getInfo())
print('Distinct based on two properties:',
fc.distinct(['fuel1', 'source']).getInfo())
print('Distinct based on geometry', fc.distinct('.geo').getInfo())
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-26。
[null,null,["最后更新时间 (UTC):2025-07-26。"],[],["The `distinct` method removes duplicate features from a `FeatureCollection`. Duplicates are identified by comparing the serialized form of specified properties using a strong hash. The `properties` argument defines the comparison criteria, accepting a single property name or a list, including '.geo' for geometry. The method returns a new `FeatureCollection` with the duplicates removed. Examples are provided for both JavaScript and Python, using power plants in Belgium and properties like 'fuel1', 'source' or geometry to remove duplicates.\n"],null,[]]