在ENVI中打开使用Landsat8 Level2 影像

在很多时候，当我们需要用到的Landsat8  L1影像缺乏时，我们可能会去考虑使用Landsat8  L2影像，但是L2影像不能直接在ENVI中打开、编辑，这时候我们就要对其进行一些处理，以便我们能够在ENVI中像打开Landsat8  L1影像那样正常打开、编辑和使用。

0、如果我们不对图像数据进行处理直接打开会报错；

1、因为他不是L1格式的文件，所以我们对影像进行处理。首先需要解压我们下载好的原始影像文件；

2、用记事本打开文件中的MTL.txt文件；

3、将MTL.txt文件中的第一行“GROUP = LANDSAT_METADATA_FILE”修改为“GROUP = L1_METADATA_FILE”；

4、将重复项“GROUP = LEVEL1_PROCESSING_RECORD”至“  END_GROUP = LEVEL1_PROCESSING_RECORD”节点的内容全部删除；

GROUP = LEVEL1_PROCESSING_RECORD
    ORIGIN = "Image courtesy of the U.S. Geological Survey"
    DIGITAL_OBJECT_IDENTIFIER = "https://doi.org/10.5066/P975CC9B"
    REQUEST_ID = "1775866_00030"
    LANDSAT_SCENE_ID = "LC81280392023227LGN00"
    LANDSAT_PRODUCT_ID = "LC08_L1TP_128039_20230815_20230819_02_T1"
    PROCESSING_LEVEL = "L1TP"
    COLLECTION_CATEGORY = "T1"
    OUTPUT_FORMAT = "GEOTIFF"
    DATE_PRODUCT_GENERATED = 2023-08-19T04:07:41Z
    PROCESSING_SOFTWARE_VERSION = "LPGS_16.3.0"
    FILE_NAME_BAND_1 = "LC08_L1TP_128039_20230815_20230819_02_T1_B1.TIF"
    FILE_NAME_BAND_2 = "LC08_L1TP_128039_20230815_20230819_02_T1_B2.TIF"
    FILE_NAME_BAND_3 = "LC08_L1TP_128039_20230815_20230819_02_T1_B3.TIF"
    FILE_NAME_BAND_4 = "LC08_L1TP_128039_20230815_20230819_02_T1_B4.TIF"
    FILE_NAME_BAND_5 = "LC08_L1TP_128039_20230815_20230819_02_T1_B5.TIF"
    FILE_NAME_BAND_6 = "LC08_L1TP_128039_20230815_20230819_02_T1_B6.TIF"
    FILE_NAME_BAND_7 = "LC08_L1TP_128039_20230815_20230819_02_T1_B7.TIF"
    FILE_NAME_BAND_8 = "LC08_L1TP_128039_20230815_20230819_02_T1_B8.TIF"
    FILE_NAME_BAND_9 = "LC08_L1TP_128039_20230815_20230819_02_T1_B9.TIF"
    FILE_NAME_BAND_10 = "LC08_L1TP_128039_20230815_20230819_02_T1_B10.TIF"
    FILE_NAME_BAND_11 = "LC08_L1TP_128039_20230815_20230819_02_T1_B11.TIF"
    FILE_NAME_QUALITY_L1_PIXEL = "LC08_L1TP_128039_20230815_20230819_02_T1_QA_PIXEL.TIF"
    FILE_NAME_QUALITY_L1_RADIOMETRIC_SATURATION = "LC08_L1TP_128039_20230815_20230819_02_T1_QA_RADSAT.TIF"
    FILE_NAME_ANGLE_COEFFICIENT = "LC08_L1TP_128039_20230815_20230819_02_T1_ANG.txt"
    FILE_NAME_ANGLE_SENSOR_AZIMUTH_BAND_4 = "LC08_L1TP_128039_20230815_20230819_02_T1_VAA.TIF"
    FILE_NAME_ANGLE_SENSOR_ZENITH_BAND_4 = "LC08_L1TP_128039_20230815_20230819_02_T1_VZA.TIF"
    FILE_NAME_ANGLE_SOLAR_AZIMUTH_BAND_4 = "LC08_L1TP_128039_20230815_20230819_02_T1_SAA.TIF"
    FILE_NAME_ANGLE_SOLAR_ZENITH_BAND_4 = "LC08_L1TP_128039_20230815_20230819_02_T1_SZA.TIF"
    FILE_NAME_METADATA_ODL = "LC08_L1TP_128039_20230815_20230819_02_T1_MTL.txt"
    FILE_NAME_METADATA_XML = "LC08_L1TP_128039_20230815_20230819_02_T1_MTL.xml"
    FILE_NAME_CPF = "LC08CPF_20230701_20230930_02.03"
    FILE_NAME_BPF_OLI = "LO8BPF20230815030548_20230815043619.01"
    FILE_NAME_BPF_TIRS = "LT8BPF20230810140636_20230817102406.01"
    FILE_NAME_RLUT = "LC08RLUT_20150303_20431231_02_01.h5"
    DATA_SOURCE_TIRS_STRAY_LIGHT_CORRECTION = "TIRS"
    DATA_SOURCE_ELEVATION = "GLS2000"
    GROUND_CONTROL_POINTS_VERSION = 5
    GROUND_CONTROL_POINTS_MODEL = 830
    GEOMETRIC_RMSE_MODEL = 5.811
    GEOMETRIC_RMSE_MODEL_Y = 4.294
    GEOMETRIC_RMSE_MODEL_X = 3.915
    GROUND_CONTROL_POINTS_VERIFY = 237
    GEOMETRIC_RMSE_VERIFY = 4.332
  END_GROUP = LEVEL1_PROCESSING_RECORD

5、将文件倒数第二行“END_GROUP = LANDSAT_METADATA_FILE”改为“END_GROUP = L1_METADATA_FILE”；

6、最后，保存文件即可。

*如果需要修改的文件较多，可以使用编程语言对文件进行批量修改。