ee.Image.select

從圖片中選取波段。

傳回含有所選波段的圖片。

用量傳回
Image.select(var_args)圖片
引數類型詳細資料
這個：image圖片Image 執行個體。
var_argsVarArgs<Object>有兩種可能：
  • 任意數量的非清單引數。這些都會解讀為頻帶選取器。可以是樂團名稱、規則運算式或數字索引。例如：selected = image.select('a', 'b', 3, 'd');
  • 兩份清單。第一個會做為樂團選取器，第二個則做為所選樂團的新名稱。新名稱的數量必須與所選樂團數量相符。例如：selected = image.select(['a', 4], ['newA', 'newB']);

範例

程式碼編輯器 (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());

Python 設定

請參閱 Python 環境頁面，瞭解 Python API 和如何使用 geemap 進行互動式開發。

import ee
import geemap.core as geemap

Colab (Python)

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

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

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

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

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

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

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

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

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

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

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

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

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