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Kirim masukan
ee.ImageCollection.aggregate_total_sd
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Menggabungkan properti tertentu dari objek dalam koleksi, menghitung total simpangan baku nilai properti yang dipilih.
Penggunaan Hasil ImageCollection. aggregate_total_sd (property)
Angka
Argumen Jenis Detail ini: collection
FeatureCollection Koleksi yang akan digabungkan. property
String Properti yang akan digunakan dari setiap elemen koleksi.
Contoh
Code Editor (JavaScript)
// A Lansat 8 TOA image collection for a specific year and location.
var col = ee . ImageCollection ( "LANDSAT/LC08/C02/T1_TOA" )
. filterBounds ( ee . Geometry . Point ([ - 122.073 , 37.188 ]))
. filterDate ( '2018' , '2019' );
// An image property of interest, percent cloud cover in this case.
var prop = 'CLOUD_COVER' ;
// Use ee.ImageCollection.aggregate_* functions to fetch information about
// values of a selected property across all images in the collection. For
// example, produce a list of all values, get counts, and calculate statistics.
print ( 'List of property values' , col . aggregate_array ( prop ));
print ( 'Count of property values' , col . aggregate_count ( prop ));
print ( 'Count of distinct property values' , col . aggregate_count_distinct ( prop ));
print ( 'First collection element property value' , col . aggregate_first ( prop ));
print ( 'Histogram of property values' , col . aggregate_histogram ( prop ));
print ( 'Min of property values' , col . aggregate_min ( prop ));
print ( 'Max of property values' , col . aggregate_max ( prop ));
// The following methods are applicable to numerical properties only.
print ( 'Mean of property values' , col . aggregate_mean ( prop ));
print ( 'Sum of property values' , col . aggregate_sum ( prop ));
print ( 'Product of property values' , col . aggregate_product ( prop ));
print ( 'Std dev (sample) of property values' , col . aggregate_sample_sd ( prop ));
print ( 'Variance (sample) of property values' , col . aggregate_sample_var ( prop ));
print ( 'Std dev (total) of property values' , col . aggregate_total_sd ( prop ));
print ( 'Variance (total) of property values' , col . aggregate_total_var ( prop ));
print ( 'Summary stats of property values' , col . aggregate_stats ( prop ));
// Note that if the property is formatted as a string, min and max will
// respectively return the first and last values according to alphanumeric
// order of the property values.
var propString = 'LANDSAT_SCENE_ID' ;
print ( 'List of property values (string)' , col . aggregate_array ( propString ));
print ( 'Min of property values (string)' , col . aggregate_min ( propString ));
print ( 'Max of property values (string)' , col . aggregate_max ( propString ));
Penyiapan Python
Lihat halaman
Lingkungan Python untuk mengetahui informasi tentang Python API dan penggunaan
geemap
untuk pengembangan interaktif.
import ee
import geemap.core as geemap
Colab (Python)
from pprint import pprint
# A Lansat 8 TOA image collection for a specific year and location.
col = ee . ImageCollection ( "LANDSAT/LC08/C02/T1_TOA" ) . filterBounds (
ee . Geometry . Point ([ - 122.073 , 37.188 ])) . filterDate ( '2018' , '2019' )
# An image property of interest, percent cloud cover in this case.
prop = 'CLOUD_COVER'
# Use ee.ImageCollection.aggregate_* functions to fetch information about
# values of a selected property across all images in the collection. For
# example, produce a list of all values, get counts, and calculate statistics.
print ( 'List of property values:' , col . aggregate_array ( prop ) . getInfo ())
print ( 'Count of property values:' , col . aggregate_count ( prop ) . getInfo ())
print ( 'Count of distinct property values:' ,
col . aggregate_count_distinct ( prop ) . getInfo ())
print ( 'First collection element property value:' ,
col . aggregate_first ( prop ) . getInfo ())
print ( 'Histogram of property values:' )
pprint ( col . aggregate_histogram ( prop ) . getInfo ())
print ( 'Min of property values:' , col . aggregate_min ( prop ) . getInfo ())
print ( 'Max of property values:' , col . aggregate_max ( prop ) . getInfo ())
# The following methods are applicable to numerical properties only.
print ( 'Mean of property values:' , col . aggregate_mean ( prop ) . getInfo ())
print ( 'Sum of property values:' , col . aggregate_sum ( prop ) . getInfo ())
print ( 'Product of property values:' , col . aggregate_product ( prop ) . getInfo ())
print ( 'Std dev (sample) of property values:' ,
col . aggregate_sample_sd ( prop ) . getInfo ())
print ( 'Variance (sample) of property values:' ,
col . aggregate_sample_var ( prop ) . getInfo ())
print ( 'Std dev (total) of property values:' ,
col . aggregate_total_sd ( prop ) . getInfo ())
print ( 'Variance (total) of property values:' ,
col . aggregate_total_var ( prop ) . getInfo ())
print ( 'Summary stats of property values:' )
pprint ( col . aggregate_stats ( prop ) . getInfo ())
# Note that if the property is formatted as a string, min and max will
# respectively return the first and last values according to alphanumeric
# order of the property values.
prop_string = 'LANDSAT_SCENE_ID'
print ( 'List of property values (string):' ,
col . aggregate_array ( prop_string ) . getInfo ())
print ( 'Min of property values (string):' ,
col . aggregate_min ( prop_string ) . getInfo ())
print ( 'Max of property values (string):' ,
col . aggregate_max ( prop_string ) . getInfo ())
Kirim masukan
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0 , sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0 . Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers . Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-07-26 UTC.
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[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Informasi yang saya butuhkan tidak ada","missingTheInformationINeed","thumb-down"],["Terlalu rumit/langkahnya terlalu banyak","tooComplicatedTooManySteps","thumb-down"],["Sudah usang","outOfDate","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Masalah kode / contoh","samplesCodeIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],["Terakhir diperbarui pada 2025-07-26 UTC."],[],[]]