ee.Image.select

Seleciona bandas de uma imagem.

Retorna uma imagem com as bandas selecionadas.

UsoRetorna
Image.select(var_args)Imagem
ArgumentoTipoDetalhes
isto: imageImagemA instância de imagem.
var_argsVarArgs[Object]Uma das duas possibilidades:
  • Qualquer número de argumentos que não sejam de lista. Todos eles serão interpretados como seletores de banda. Podem ser nomes de bandas, expressões regulares ou índices numéricos. Por exemplo: selected = image.select('a', 'b', 3, 'd');
  • Duas listas. O primeiro será usado como seletor de bandas, e o segundo como novos nomes para as bandas selecionadas. O número de novos nomes precisa corresponder ao número de bandas selecionadas. Por exemplo, selected = image.select(['a', 4], ['newA', 'newB']);

Exemplos

Editor de código (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());

Configuração do Python

Consulte a página Ambiente Python (em inglês) para informações sobre a API Python e como usar geemap para desenvolvimento interativo.

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())