ee.Filter.date

Filtra una raccolta in base all'intervallo di date. L'inizio e la fine possono essere date o numeri

(interpretati come millisecondi dal 1970-01-01T00:00:00Z) o stringhe (ad esempio "1996-01-01T08:00"). In base alla proprietà "system:time_start".

Restituisce il filtro creato.

UtilizzoResi
ee.Filter.date(start, end)Filtro
ArgomentoTipoDettagli
startData|Numero|StringaLa data di inizio (inclusa).
endData|Numero|Stringa, facoltativoLa data di fine (esclusa). (Facoltativo) Se non viene specificato, viene creato un intervallo di 1 millisecondo a partire da "start".

Esempi

Editor di codice (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'))));

Configurazione di Python

Consulta la pagina Ambiente Python per informazioni sull'API Python e sull'utilizzo di geemap per lo sviluppo interattivo.

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()
)