ee.ImageCollection.select

Pilih rentang dari setiap gambar dalam koleksi.

Menampilkan koleksi gambar dengan band yang dipilih.

Penggunaan	Hasil
ImageCollection.select(selectors, names)	ImageCollection

Argumen	Jenis	Detail
ini: imagecollection	ImageCollection	Instance ImageCollection.
selectors	List[Object]	Daftar nama, ekspresi reguler, atau indeks numerik yang menentukan band yang akan dipilih.
names	List[String], opsional	Daftar nama baru untuk band output. Harus cocok dengan jumlah rentang yang dipilih.

Contoh

Editor Kode (JavaScript)

// A Sentinel-2 surface reflectance image collection.
var col = ee.ImageCollection('COPERNICUS/S2_SR')
    .filterBounds(ee.Geometry.Point(-122.152, 37.336))
    .filterDate('2021-01-01', '2021-02-01');
print('All band names', col.first().bandNames());

print('Select a band by name',
      col.select('B11').first().bandNames());

print('Select a band by index',
      col.select(10).first().bandNames());

print('Select bands using a list',
      col.select(['B11', 'B8', 'B3']).first().bandNames());

print('Select bands by an argument series',
      col.select('B11', 'B8', 'B3').first().bandNames());

print('Mixing string and integer selectors is valid',
      col.select(10, 'B8', 2).first().bandNames());

print('Rename selected bands using two corresponding lists',
      col.select(['B11', 'B8', 'B3'], ['SWIR1', 'NIR', 'Green'])
      .first().bandNames());

// Use regular expressions to select bands.
print('Match "QA" followed by any two characters',
      col.select('QA..').first().bandNames());

print('Match "B" followed by any character, any number of times',
      col.select('B.*').first().bandNames());

print('Match "B" followed by any character, and any optional third character',
      col.select('B..?').first().bandNames());

print('Match "B" followed by a character in the range 6-8',
      col.select('B[6-8]').first().bandNames());

print('Match "B" followed by a character in the range 1-9 and then 1-2',
      col.select('B[1-9][1-2]').first().bandNames());

print('Match "B" or "QA" each followed by any character, any number of times.',
      col.select('B.*|QA.*').first().bandNames());

Penyiapan Python

Baca 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 Sentinel-2 surface reflectance image collection.
col = ee.ImageCollection('COPERNICUS/S2_SR').filterBounds(
    ee.Geometry.Point(-122.152, 37.336)
    ).filterDate('2021-01-01', '2021-02-01')
display('All band names', col.first().bandNames())

display('Select a band by name:',
        col.select('B11').first().bandNames())

display('Select a band by index:',
        col.select(10).first().bandNames())

display('Select bands using a list:',
        col.select(['B11', 'B8', 'B3']).first().bandNames())

display('Select bands by an argument series:',
        col.select('B11', 'B8', 'B3').first().bandNames())

display('Mixing string and integer selectors is valid:',
        col.select(10, 'B8', 2).first().bandNames())

display('Rename selected bands using two corresponding lists:',
        col.select(['B11', 'B8', 'B3'], ['SWIR1', 'NIR', 'Green'])
        .first().bandNames())

# Use regular expressions to select bands.
display('Match "QA" followed by any two characters:',
        col.select('QA..').first().bandNames())

display('Match "B" followed by any character, any number of times:',
        col.select('B.*').first().bandNames())

display('Match "B" followed by any character, and any optional third character:',
        col.select('B..?').first().bandNames())

display('Match "B" followed by a character in the range 6-8:',
        col.select('B[6-8]').first().bandNames())

display('Match "B" followed by a character in the range 1-9 and then 1-2:',
        col.select('B[1-9][1-2]').first().bandNames())

display('Match "B" or "QA" each followed by any character, any number of times:',
        col.select('B.*|QA.*').first().bandNames())