def ee_bands(collection):
    """
    Earth Engine band names
    """
    
    dic = {
        'Sentinel2_TOA': ['B1','B2','B3','B4','B5','B6','B7','B8A','B8','B11','B12'],
        'Landsat7_SR': ['B1','B2','B3','B4','B5','B6','B7'],
        'Landsat8_SR': ['B1','B2','B3','B4','B5','B6','B7','B10','B11'],
        'CroplandDataLayers': ['landcover', 'cropland', 'land', 'water', 'urban'],
        'NationalLandCoverDatabase': ['impervious']
    }
    
    return dic[collection]