Google Earth Engine ——Landsat 2 MSS Collection 1 Tier 1/T2 DN values經過縮放、校準的傳感器輻射度資料集

Landsat 2 MSS Collection 1 Tier 1 DN values, representing scaled, calibrated at-sensor radiance.

Landsat scenes with the highest available data quality are placed into Tier 1 and are considered suitable for time-series processing analysis. Tier 1 includes Level-1 Precision Terrain (L1TP) processed data that have well-characterized radiometry and are inter-calibrated across the different Landsat sensors. The georegistration of Tier 1 scenes will be consistent and within prescribed tolerances [<=12 m root mean square error (RMSE)]. All Tier 1 Landsat data can be considered consistent and inter-calibrated (regardless of sensor) across the full collection. See more information ​​in the USGS docs​​.

For more information, see ​​Landsat MSS Product Information Page​​

Landsat 2 MSS Collection 1 Tier 1 DN值，代表經過縮放、校準的傳感器輻射度。

具有最高可用資料品質的陸地衛星場景被歸入第1級，并被認為适合進行時間序列處理分析。第一級包括一級精确地形（L1TP）處理的資料，這些資料具有良好的輻射測量特性，并在不同的Landsat傳感器之間進行了互相校準。第1級場景的地理注冊将是一緻的，并在規定的公差範圍内[<=12米均方根誤差（RMSE）]。所有第1級Landsat資料都可以被認為是一緻的，并且在整個集合中進行了互相校準（不管是哪個傳感器）。參見USGS文檔中的更多資訊。

Scenes not meeting Tier 1 criteria during processing are assigned to Tier 2. This includes Systematic terrain (L1GT) and Systematic (L1GS) processed scenes, as well as any L1TP scenes that do not meet the Tier 1 specifications due to significant cloud cover, insufficient ground control, and other factors. Users interested in Tier 2 scenes can analyze the RMSE and other properties to determine the suitability for use in individual applications and studies. See more information ​​in the USGS docs​​.更多資訊，見Landsat MSS産品資訊頁

在處理過程中不符合第1級标準的場景被配置設定到第2級。這包括系統地形（L1GT）和系統（L1GS）處理過的場景，以及任何由于大量雲層覆寫、地面控制不足和其他因素而不符合第1級規格的L1TP場景。對第2級場景感興趣的使用者可以分析RMSE和其他屬性，以确定是否适合用于個人應用和研究。更多資訊見美國地質調查局的檔案。

Dataset Availability

1975-01-22T00:00:00 - 1982-02-26T00:00:00

Dataset Provider

​​USGS​​

Collection Snippet

​

​ee.ImageCollection("LANDSAT/LM02/C01/T1")​

​

Bands Table

Name	Description	Resolution	Wavelength
B4	Green	60 meters	0.5 - 0.6 µm
B5	Red	60 meters	0.6 - 0.7 µm
B6	Near Infrared 1	60 meters	0.7 - 0.8 µm
B7	Near Infrared 2	30 meters	0.8 - 1.1 µm
BQA	Landsat Collection 1 QA Bitmask ([See Landsat QA page](https://www.usgs.gov/land-resources/nli/landsat/landsat-collection-1-level-1-quality-assessment-band))	60 meters
BQA Bitmask	Bit 0: Designated Fill 0: No 1: Yes Bit 1: Dropped Pixel 0: No 1: Yes Bits 2-3: Radiometric Saturation 0: No bands contain saturation 1: 1-2 bands contain saturation 2: 3-4 bands contain saturation 3: 5 or more bands contain saturation Bit 4: Cloud 0: No 1: Yes

Name	Type	Description
CLOUD_COVER	Double	Percentage cloud cover (0-100), -1 = not calculated.
CLOUD_COVER_LAND	Double	Percentage cloud cover over land (0-100), -1 = not calculated.
COLLECTION_CATEGORY	String	Tier of scene. (T1 or T2)
COLLECTION_NUMBER	Double	Number of collection.
CORRECTION_GAIN_BAND_4	String	Internal calibration gain method for band 4.
CORRECTION_GAIN_BAND_5	String	Internal calibration gain method for band 5.
CORRECTION_GAIN_BAND_6	String	Internal calibration gain method for band 6.
CORRECTION_GAIN_BAND_7	String	Internal calibration gain method for band 7.
CPF_NAME	String	Calibration parameter file name.
DATA_CATEGORY	String	Current data category assigned to the data. Possible values: ("NOMINAL", "VALIDATION", "EXCHANGE", "TEST", "ENGINEERING")
DATA_TYPE	String	Data type identifier. (L1T or L1G)
DATA_TYPE_L0RP	String	Data type identifier string used to create the L0RP product.
DATE_ACQUIRED	String	Image acquisition date. "YYYY-MM-DD"
DATUM	String	Datum used in image creation.
EARTH_SUN_DISTANCE	Double	Earth sun distance in astronomical units (AU).
ELEVATION_SOURCE	String	Elevation model source used for standard terrain corrected (L1T) products.
ELLIPSOID	String	Ellipsoid used in image creation.
EPHEMERIS_TYPE	String	Ephemeris data type used to perform geometric correction. (Definitive or Predictive)
FILE_DATE	Double	File date in milliseconds since epoch.
GAIN_BAND_4	String	Gain state for Band 1. (L = Low gain, H = High)
GAIN_BAND_5	String	Gain state for Band 2. (L = Low gain, H = High)
GAIN_BAND_6	String	Gain state for Band 3. (L = Low gain, H = High)
GAIN_BAND_7	String	Gain state for Band 4. (L = Low gain, H = High)
GEOMETRIC_RMSE_MODEL	Double	Combined Root Mean Square Error (RMSE) of the geometric residuals (metres) in both across-track and along-track directions measured on the GCPs used in geometric precision correction. Not present in L1G products.
GEOMETRIC_RMSE_MODEL_X	Double	RMSE of the X direction geometric residuals (in metres) measured on the GCPs used in geometric precision correction. Not present in L1G products.
GEOMETRIC_RMSE_MODEL_Y	Double	RMSE of the Y direction geometric residuals (in metres) measured on the GCPs used in geometric precision correction. Not present in L1G products.
GEOMETRIC_RMSE_VERIFY	Double	RMSE of the geometric residuals (pixels) in both line and sample directions measured on the terrain-corrected product independently using GLS2000.
GEOMETRIC_RMSE_VERIFY_QUAD_LL	Double	RMSE of the geometric residuals (pixels) of the lower-left quadrant measured on the terrain-corrected product independently using GLS2000.
GEOMETRIC_RMSE_VERIFY_QUAD_LR	Double	RMSE of the geometric residuals (pixels) of the lower-right quadrant measured on the terrain-corrected product independently using GLS2000.
GEOMETRIC_RMSE_VERIFY_QUAD_UL	Double	RMSE of the geometric residuals (pixels) of the upper-left quadrant measured on the terrain-corrected product independently using GLS2000.
GEOMETRIC_RMSE_VERIFY_QUAD_UR	Double	RMSE of the geometric residuals (pixels) of the upper-right quadrant measured on the terrain-corrected product independently using GLS2000.
GRID_CELL_SIZE_REFLECTIVE	Double	Grid cell size used in creating the image for the reflective band.
GROUND_CONTROL_POINTS_MODEL	Double	The number of ground control points used. Not used in L1GT products. Values: 0 - 999 (0 is used for L1T products that have used Multi-scene refinement).
GROUND_CONTROL_POINTS_VERIFY	Double	The number of ground control points used in the verification of the terrain corrected product. Values: -1 to 1615 (-1 = not available)
GROUND_CONTROL_POINTS_VERSION	Double	The number of ground control points used in the verification of the terrain corrected product. Values: -1 to 1615 (-1 = not available)
IMAGE_QUALITY	Double	Image quality, 0 = worst, 9 = best, -1 = quality not calculated
LANDSAT_PRODUCT_ID	String	The naming convention of each Landsat Collection 1 Level-1 image based on acquisition parameters and processing parameters. Format: LXSS_LLLL_PPPRRR_YYYYMMDD_yyyymmdd_CC_TX * L = Landsat * X = Sensor (O = Operational Land Imager, T = Thermal Infrared Sensor, C = Combined OLI/TIRS) * SS = Satellite (08 = Landsat 8) * LLLL = Processing Correction Level (L1TP = precision and terrain, L1GT = systematic terrain, L1GS = systematic) * PPP = WRS Path * RRR = WRS Row * YYYYMMDD = Acquisition Date expressed in Year, Month, Day * yyyymmdd = Processing Date expressed in Year, Month, Day * CC = Collection Number (01) * TX = Collection Category (RT = Real Time, T1 = Tier 1, T2 = Tier 2)
LANDSAT_SCENE_ID	String	The Pre-Collection naming convention of each image is based on acquisition parameters. This was the naming convention used prior to Collection 1. Format: LXSPPPRRRYYYYDDDGSIVV * L = Landsat * X = Sensor (O = Operational Land Imager, T = Thermal Infrared Sensor, C = Combined OLI/TIRS) * S = Satellite (08 = Landsat 8) * PPP = WRS Path * RRR = WRS Row * YYYY = Year of Acquisition * DDD = Julian Day of Acquisition * GSI = Ground Station Identifier * VV = Version
MAP_PROJECTION	String	Projection used to represent the 3-dimensional surface of the earth for the Level-1 product.
MAP_PROJECTION_L0RA	String	L0RA map projection selectively applied to HDTs based on geographic location. Used for processed archive data.
ORIENTATION	String	Orientation used in creating the image. Values: NOMINAL = Nominal Path, NORTH_UP = North Up, TRUE_NORTH = True North, USER = User
PRESENT_BAND_4	String	Presence of Band 4 (Y = Yes, N = No, M = Missing, I = Unknown)
PRESENT_BAND_5	String	Presence of Band 5 (Y = Yes, N = No, M = Missing, I = Unknown)
PRESENT_BAND_6	String	Presence of Band 6 (Y = Yes, N = No, M = Missing, I = Unknown)
PRESENT_BAND_7	String	Presence of Band 7 (Y = Yes, N = No, M = Missing, I = Unknown)
PROCESSING_SOFTWARE_VERSION	String	Name and version of the processing software used to generate the L1 product.
RADIANCE_ADD_BAND_4	Double	Additive rescaling factor used to convert calibrated DN to radiance for Band 4.
RADIANCE_ADD_BAND_5	Double	Additive rescaling factor used to convert calibrated DN to radiance for Band 5.
RADIANCE_ADD_BAND_6	Double	Additive rescaling factor used to convert calibrated DN to radiance for Band 6.
RADIANCE_ADD_BAND_7	Double	Additive rescaling factor used to convert calibrated DN to radiance for Band 7.
RADIANCE_MULT_BAND_4	Double	Multiplicative rescaling factor used to convert calibrated Band 4 DN to radiance.
RADIANCE_MULT_BAND_5	Double	Multiplicative rescaling factor used to convert calibrated Band 5 DN to radiance.
RADIANCE_MULT_BAND_6	Double	Multiplicative rescaling factor used to convert calibrated Band 6 DN to radiance.
RADIANCE_MULT_BAND_7	Double	Multiplicative rescaling factor used to convert calibrated Band 7 DN to radiance.
REFLECTANCE_ADD_BAND_4	Double	Additive rescaling factor used to convert calibrated Band 4 DN to reflectance.
REFLECTANCE_ADD_BAND_5	Double	Additive rescaling factor used to convert calibrated Band 5 DN to reflectance.
REFLECTANCE_ADD_BAND_6	Double	Additive rescaling factor used to convert calibrated Band 6 DN to reflectance.
REFLECTANCE_ADD_BAND_7	Double	Additive rescaling factor used to convert calibrated Band 7 DN to reflectance.
REFLECTANCE_MULT_BAND_4	Double	Multiplicative factor used to convert calibrated Band 4 DN to reflectance.
REFLECTANCE_MULT_BAND_5	Double	Multiplicative factor used to convert calibrated Band 5 DN to reflectance.
REFLECTANCE_MULT_BAND_6	Double	Multiplicative factor used to convert calibrated Band 6 DN to reflectance.
REFLECTANCE_MULT_BAND_7	Double	Multiplicative factor used to convert calibrated Band 7 DN to reflectance.
REFLECTIVE_LINES	Double	Number of product lines for the reflective bands.
REFLECTIVE_SAMPLES	Double	Number of product samples for the reflective bands.
REQUEST_ID	String	Request id, nnnyymmdd0000_0000 * nnn = node number * yy = year * mm = month * dd = day
RESAMPLING_OPTION	String	Resampling option used in creating the image.
SATURATION_BAND_4	String	Flag indicating saturated pixels for band 4 ('Y'/'N')
SATURATION_BAND_5	String	Flag indicating saturated pixels for band 5 ('Y'/'N')
SATURATION_BAND_6	String	Flag indicating saturated pixels for band 6 ('Y'/'N')
SATURATION_BAND_7	String	Flag indicating saturated pixels for band 7 ('Y'/'N')
SCENE_CENTER_TIME	String	Scene center time of acquired image. HH:MM:SS.SSSSSSSZ * HH = Hour (00-23) * MM = Minutes * SS.SSSSSSS = Fractional seconds * Z = "Zulu" time (same as GMT)
SENSOR_ID	String	Sensor used to capture data.
SPACECRAFT_ID	String	Spacecraft identification.
STATION_ID	String	Ground Station/Organisation that received the data.
SUN_AZIMUTH	Double	Sun azimuth angle in degrees for the image center location at the image centre acquisition time.
SUN_ELEVATION	Double	Sun elevation angle in degrees for the image center location at the image centre acquisition time.
UTM_ZONE	Double	UTM zone number used in product map projection.
WRS_PATH	Double	The WRS orbital path number (001 - 251).
WRS_ROW	Double	Landsat satellite WRS row (001-248).

使用說明：

Landsat datasets are federally created data and therefore reside in the public domain and may be used, transferred, or reproduced without copyright restriction.

Acknowledgement or credit of the USGS as data source should be provided by including a line of text citation such as the example shown below.

(Product, Image, Photograph, or Dataset Name) courtesy of the U.S. Geological Survey

Example: Landsat-7 image courtesy of the U.S. Geological Survey

See the ​​USGS Visual Identity System Guidance​​ for further details on proper citation and acknowledgement of USGS products.

Landsat資料集是聯邦建立的資料，是以屬于公共領域，可以在沒有版權限制的情況下使用、轉讓或複制。

對美國地質調查局作為資料來源的确認或信用，應通過包括一行文字引用來提供，如下面的例子。

(産品、圖像、照片或資料集名稱）由美國地質調查局提供。

例子。Landsat-7圖像由美國地質調查局提供

請參閱美國地質調查局視覺識别系統指南，了解有關美國地質調查局産品的正确引用和鳴謝的進一步細節。

代碼：

var dataset = ee.ImageCollection('LANDSAT/LM02/C01/T1')
                  .filterDate('1978-01-01', '1980-12-31');
var nearInfrared321 = dataset.select(['B6', 'B5', 'B4']);
var nearInfrared321Vis = {};
Map.setCenter(6.746, 46.529, 6);
Map.addLayer(nearInfrared321, nearInfrared321Vis, 'Near Infrared (321)');      

代碼：

var dataset = ee.ImageCollection('LANDSAT/LM02/C01/T2')
                  .filterDate('1978-01-01', '1980-12-31');
var nearInfrared321 = dataset.select(['B6', 'B5', 'B4']);
var nearInfrared321Vis = {};
Map.setCenter(6.746, 46.529, 6);
Map.addLayer(nearInfrared321, nearInfrared321Vis, 'Near Infrared (321)');