ee.Image.select

Memilih band dari gambar.

Menampilkan gambar dengan band yang dipilih.

Penggunaan	Hasil
Image.select(var_args)	Gambar

Argumen	Jenis	Detail
ini: image	Gambar	Instance Gambar.
var_args	VarArgs<Object>	Salah satu dari dua kemungkinan: Jumlah argumen non-daftar apa pun. Semua ini akan ditafsirkan sebagai pemilih band. Ini dapat berupa nama band, regex, atau indeks numerik. Misalnya, selected = image.select('a', 'b', 3, 'd'); Dua daftar. Yang pertama akan digunakan sebagai pemilih band dan yang kedua sebagai nama baru untuk band yang dipilih. Jumlah nama baru harus sesuai dengan jumlah band yang dipilih. Misalnya, selected = image.select(['a', 4], ['newA', 'newB']);

Contoh

Code Editor (JavaScript)

// A Sentinel-2 surface reflectance image.
var img = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG');
print('All band names', img.bandNames());

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

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

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

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

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

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

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

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

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

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

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

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

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 Sentinel-2 surface reflectance image.
img = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG')
print('All band names:', img.bandNames().getInfo())

print('Select a band by name:', img.select('B11').bandNames().getInfo())

print('Select a band by index:', img.select(10).bandNames().getInfo())

print('Select bands using a list:',
      img.select(['B11', 'B8', 'B3']).bandNames().getInfo())

print('Select bands by an argument series:',
      img.select('B11', 'B8', 'B3').bandNames().getInfo())

print('Mixing string and integer selectors is valid:',
      img.select(10, 'B8', 2).bandNames().getInfo())

print('Rename selected bands using two corresponding lists:',
      img.select(['B11', 'B8', 'B3'], ['SWIR1', 'NIR', 'Green'])
      .bandNames().getInfo())

# Use regular expressions to select bands.
print('Match "QA" followed by any two characters:',
      img.select('QA..').bandNames().getInfo())

print('Match "B" followed by any character, any number of times:',
      img.select('B.*').bandNames().getInfo())

print('Match "B" followed by any character, and any optional third character',
      img.select('B..?').bandNames().getInfo())

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

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

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