ee.Filter.calendarRange

객체의 타임스탬프가 지정된 캘린더 필드 범위에 속하는 경우 통과하는 필터를 반환합니다. month, day_of_year, day_of_month, day_of_week는 1부터 시작합니다. 시간은 UTC로 간주됩니다. 주는 월요일을 1일로 시작하는 것으로 가정합니다. end < start인 경우 value >= start 또는 value <= end를 테스트하여 래핑을 허용합니다.

사용	반환 값
ee.Filter.calendarRange(start, end, field)	필터

인수	유형	세부정보
start	정수	원하는 캘린더 필드의 시작입니다(포함).
end	정수, 기본값: null	원하는 캘린더 필드의 종료입니다(포함). 기본값은 시작과 동일한 값입니다.
field	문자열, 기본값: 'day_of_year'	필터링할 캘린더 필드입니다. 옵션은 `year`, `month`, `hour`, `minute`, `day_of_year`, `day_of_month`, `day_of_week`입니다.

예

코드 편집기 (JavaScript)

// A Sentinel-2 surface reflectance image collection intersecting the peak of
// Mount Shasta, California, USA.
var ic = ee.ImageCollection('COPERNICUS/S2_SR')
             .filterBounds(ee.Geometry.Point(-122.196, 41.411));

print('Images for a month range (June-August)',
      ic.filter(ee.Filter.calendarRange(6, 8, 'month')));

print('A start value greater than end value is valid (Dec-Feb)',
      ic.filter(ee.Filter.calendarRange(12, 2, 'month')));

// This example uses the 'year' field value. Note that ee.Filter.date is the
// preferred method when filtering by whole years, as it is much faster.
print('Images for a year range (2020-2021)',
      ic.filter(ee.Filter.calendarRange(2020, 2021, 'year')));

// This example uses the 'day_of_year' field value. Note that
// ee.Filter.dayOfYear is the preferred method for filtering by DOY.
// The ee.Date.getRelative function is used to identify DOY from an ee.Date
// object for a representative year. Be mindful of leap years when filtering
// by DOY.
var startDoy = ee.Date('2000-06-01').getRelative('day', 'year');
var endDoy = ee.Date('2000-06-15').getRelative('day', 'year');
print('start DOY =', startDoy,
      'end DOY =', endDoy,
      'Images for a day-of-year range',
      ic.filter(ee.Filter.calendarRange(startDoy, endDoy, 'day_of_year')));

Python 설정

Python API 및 geemap를 사용한 대화형 개발에 관한 자세한 내용은 Python 환경 페이지를 참고하세요.

import ee
import geemap.core as geemap

Colab (Python)

# A Sentinel-2 surface reflectance image collection intersecting the peak of
# Mount Shasta, California, USA.
ic = ee.ImageCollection('COPERNICUS/S2_SR').filterBounds(
    ee.Geometry.Point(-122.196, 41.411))

print('Images for a month range (June-August):',
      ic.filter(ee.Filter.calendarRange(6, 8, 'month')).getInfo())

print('A start value greater than end value is valid (Dec-Feb):',
      ic.filter(ee.Filter.calendarRange(12, 2, 'month')).size().getInfo())

# This example uses the 'year' field value. Note that ee.Filter.date is the
# preferred method when filtering by whole years, as it is much faster.
print('Images for a year range (2020-2021):',
      ic.filter(ee.Filter.calendarRange(2020, 2021, 'year')).size().getInfo())

# This example uses the 'day_of_year' field value. Note that
# ee.Filter.dayOfYear is the preferred method for filtering by DOY.
# The ee.Date.getRelative function is used to identify DOY from an ee.Date
# object for a representative year. Be mindful of leap years when filtering
# by DOY.
start_doy = ee.Date('2000-06-01').getRelative('day', 'year')
end_doy = ee.Date('2000-06-15').getRelative('day', 'year')
print('start DOY =', start_doy.getInfo(), 'end DOY =', end_doy.getInfo())
print(
    'Images for a day-of-year range:',
    ic.filter(ee.Filter.calendarRange(start_doy, end_doy, 'day_of_year'))
    .getInfo()
)