ee.ImageCollection.sort

Mengurutkan koleksi berdasarkan properti yang ditentukan.

Menampilkan koleksi yang diurutkan.

Penggunaan	Hasil
ImageCollection.sort(property, ascending)	Koleksi

Argumen	Jenis	Detail
ini: collection	Koleksi	Instance Koleksi.
property	String	Properti yang akan diurutkan.
ascending	Boolean, opsional	Apakah akan mengurutkan dalam urutan menaik atau menurun. Defaultnya adalah benar (menaik).

Contoh

Code Editor (JavaScript)

// A Landsat 8 TOA image collection (2 months of images at a specific point).
var col = ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA')
  .filterBounds(ee.Geometry.Point(-90.70, 34.71))
  .filterDate('2020-07-01', '2020-09-01');
print('Collection', col);

// Sort the collection in ASCENDING order of image cloud cover.
var colCldSortAsc = col.sort('CLOUD_COVER');
print('Cloud cover ascending', colCldSortAsc);

// Display the image with the least cloud cover.
var visParams = {
  bands: ['B4', 'B3', 'B2'],
  min: 0.01,
  max: 0.25
};
Map.setCenter(-90.70, 34.71, 9);
Map.addLayer(colCldSortAsc.first(), visParams, 'Least cloudy');

// Sort the collection in DESCENDING order of image cloud cover.
var colCldSortDesc = col.sort('CLOUD_COVER', false);
print('Cloud cover descending', colCldSortDesc);

// Display the image with the most cloud cover.
Map.addLayer(colCldSortDesc.first(), visParams, 'Most cloudy');

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)

# A Landsat 8 TOA image collection (2 months of images at a specific point).
col = (
    ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA')
    .filterBounds(ee.Geometry.Point(-90.70, 34.71))
    .filterDate('2020-07-01', '2020-09-01')
)
display('Collection', col)

# Sort the collection in ASCENDING order of image cloud cover.
col_cld_sort_asc = col.sort('CLOUD_COVER')
display('Cloud cover ascending', col_cld_sort_asc)

# Display the image with the least cloud cover.
vis_params = {'bands': ['B4', 'B3', 'B2'], 'min': 0.01, 'max': 0.25}
m = geemap.Map()
m.set_center(-90.70, 34.71, 9)
m.add_layer(col_cld_sort_asc.first(), vis_params, 'Least cloudy')

# Sort the collection in DESCENDING order of image cloud cover.
col_cld_sort_desc = col.sort('CLOUD_COVER', False)
display('Cloud cover descending', col_cld_sort_desc)

# Display the image with the most cloud cover.
m.add_layer(col_cld_sort_desc.first(), vis_params, 'Most cloudy')
m