这相当于 this.filter(ee.Filter.date(...));如需了解其他日期过滤选项,请参阅 ee.Filter 类型。
返回过滤后的集合。
用法 | 返回 |
---|---|
FeatureCollection.filterDate(start, end) | 集合 |
参数 | 类型 | 详细信息 |
---|---|---|
此:collection | 集合 | Collection 实例。 |
start | 日期|数字|字符串 | 开始日期(含)。 |
end | Date|Number|String,可选 | 结束日期(不含)。可选。如果未指定,则会创建一个从“start”开始的 1 毫秒范围。 |
示例
代码编辑器 (JavaScript)
// Constructed FeatureCollection representing a field site sampled at // four different dates; date recorded as "system:time_start" property in units // of milliseconds since Unix epoch. var geom = ee.Geometry.Point([-119.56, 37.67]); var fc = ee.FeatureCollection([ ee.Feature(geom, {'prop': 10, 'system:time_start': ee.Date('2021-06-10')}), ee.Feature(geom, {'prop': 11, 'system:time_start': ee.Date('2021-06-20')}), ee.Feature(geom, {'prop': 19, 'system:time_start': ee.Date('2021-07-10')}), ee.Feature(geom, {'prop': 10, 'system:time_start': ee.Date('2021-07-20')}) ]); // Filter the observations in July 2021. print('Field site observations collection in July 2021', fc.filterDate('2021-07-01', '2021-08-01')); // Alternative input formats. print('ee.DateRange as an input', fc.filterDate(ee.DateRange('2021-07-01', '2021-08-01'))); print('Numbers (milliseconds since Unix epoch) as an input', fc.filterDate(1625875200000, 1626739200001)); print('ee.Date objects as an input', fc.filterDate(ee.Date('2021-07-01'), ee.Date('2021-08-01')));
import ee import geemap.core as geemap
Colab (Python)
# Constructed FeatureCollection representing a field site sampled at # four different dates; date recorded as "system:time_start" property in units # of milliseconds since Unix epoch. geom = ee.Geometry.Point([-119.56, 37.67]) fc = ee.FeatureCollection([ ee.Feature(geom, {'prop': 10, 'system:time_start': ee.Date('2021-06-10')}), ee.Feature(geom, {'prop': 11, 'system:time_start': ee.Date('2021-06-20')}), ee.Feature(geom, {'prop': 19, 'system:time_start': ee.Date('2021-07-10')}), ee.Feature(geom, {'prop': 10, 'system:time_start': ee.Date('2021-07-20')}) ]) # Filter the observations in July 2021. print('Field site observations collection in July 2021:', fc.filterDate('2021-07-01', '2021-08-01').getInfo()) # Alternative input formats. print('ee.DateRange as an input:', fc.filterDate(ee.DateRange('2021-07-01', '2021-08-01')).getInfo()) print('Numbers (milliseconds since Unix epoch) as an input:', fc.filterDate(1625875200000, 1626739200001).getInfo()) print('ee.Date objects as an input:', fc.filterDate(ee.Date('2021-07-01'), ee.Date('2021-08-01')).getInfo())