(解释为自 1970-01-01T00:00:00Z 以来的毫秒数)或字符串(例如“1996-01-01T08:00”)。基于“system:time_start”属性。
返回构建的过滤条件。
用法 | 返回 |
---|---|
ee.Filter.date(start, end) | 过滤 |
参数 | 类型 | 详细信息 |
---|---|---|
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)
// collection.filterDate is preferred. // Constructed FeatureCollection representing a field site sampled at // four different dates. 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.filter(ee.Filter.date('2021-07-01', '2021-08-01'))); // Alternative input formats. var dateRange = ee.DateRange('2021-07-01', '2021-08-01'); print('ee.DateRange as an input', fc.filter(ee.Filter.date(dateRange))); print('Numbers (milliseconds since Unix epoch) as an input', fc.filter(ee.Filter.date(1625875200000, 1626739200001))); print('ee.Date objects as an input', fc.filter(ee.Filter.date(ee.Date('2021-07-01'), ee.Date('2021-08-01'))));
import ee import geemap.core as geemap
Colab (Python)
from pprint import pprint # collection.filterDate is preferred. # Constructed FeatureCollection representing a field site sampled at # four different dates. 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:') pprint(fc.filter(ee.Filter.date('2021-07-01', '2021-08-01')).getInfo()) # Alternative input formats. date_range = ee.DateRange('2021-07-01', '2021-08-01') pprint(fc.filter(ee.Filter.date(date_range)).getInfo()) print('Numbers (milliseconds since Unix epoch) as an input:') pprint(fc.filter(ee.Filter.date(1625875200000, 1626739200001)).getInfo()) print('ee.Date objects as an input:') pprint( fc.filter( ee.Filter.date(ee.Date('2021-07-01'), ee.Date('2021-08-01')) ).getInfo() )