Google Earth Engine ——LANDSAT 7 TOA系列数据 8天/32天和年际数据

2024-02-02 09:39:51 浏览数 (1)

Landsat 7 Collection 1 Tier 1 calibrated top-of-atmosphere (TOA) reflectance. Calibration coefficients are extracted from the image metadata. See Chander et al. (2009) for details on the TOA computation.

Landsat 7 Collection 1 Tier 1校准的大气层顶部（TOA）反射率。校准系数从图像元数据中提取。关于TOA计算的细节，见Chander等人（2009）。

Dataset Availability

1999-01-01T00:00:00 - 2021-08-26T00:00:00

Dataset Provider

USGS/Google

Collection Snippet

ee.ImageCollection("LANDSAT/LE07/C01/T1_TOA")

Bands Table

Name

Description

Resolution

Wavelength

B1

Blue

30 meters

0.45 - 0.52 µm

B2

Green

30 meters

0.52 - 0.60 µm

B3

Red

30 meters

0.63 - 0.69 µm

B4

Near infrared

30 meters

0.77 - 0.90 µm

B5

Shortwave infrared 1

30 meters

1.55 - 1.75 µm

B6_VCID_1

Low-gain Thermal Infrared 1. This band has expanded dynamic range and lower radiometric resolution (sensitivity), with less saturation at high Digital Number (DN) values. Resampled from 60m to 30m.

60 meters

10.40 - 12.50 µm

B6_VCID_2

High-gain Thermal Infrared 1. This band has higher radiometric resolution (sensitivity), although it has a more restricted dynamic range. Resampled from 60m to 30m.

60 meters

10.40 - 12.50 µm

B7

Shortwave infrared 2

30 meters

2.08 - 2.35 µm

B8

Panchromatic

15 meters

0.52 - 0.90 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))

30 meters

BQA Bitmask

Bit 0: Designated Fill 0: No1: YesBit 1: Designated Pixel 0: No1: YesBits 2-3: Radiometric Saturation 0: No bands contain saturation1: 1-2 bands contain saturation2: 3-4 bands contain saturation3: 5 or more bands contain saturationBit 4: Cloud 0: No1: YesBits 5-6: Cloud Confidence 0: Not Determined / Condition does not exist.1: Low, (0-33 percent confidence)2: Medium, (34-66 percent confidence)3: High, (67-100 percent confidence)Bits 7-8: Cloud Shadow Confidence 0: Not Determined / Condition does not exist.1: Low, (0-33 percent confidence)2: Medium, (34-66 percent confidence)3: High, (67-100 percent confidence)Bits 9-10: Snow / Ice Confidence 0: Not Determined / Condition does not exist.1: Low, (0-33 percent confidence)2: Medium, (34-66 percent confidence)3: High, (67-100 percent confidence)

  • Bit 0: Designated Fill
    • 0: No
    • 1: Yes
  • Bit 1: Designated 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
  • Bits 5-6: Cloud Confidence
    • 0: Not Determined / Condition does not exist.
    • 1: Low, (0-33 percent confidence)
    • 2: Medium, (34-66 percent confidence)
    • 3: High, (67-100 percent confidence)
  • Bits 7-8: Cloud Shadow Confidence
    • 0: Not Determined / Condition does not exist.
    • 1: Low, (0-33 percent confidence)
    • 2: Medium, (34-66 percent confidence)
    • 3: High, (67-100 percent confidence)
  • Bits 9-10: Snow / Ice Confidence
    • 0: Not Determined / Condition does not exist.
    • 1: Low, (0-33 percent confidence)
    • 2: Medium, (34-66 percent confidence)
    • 3: High, (67-100 percent confidence)

影像属性：

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_BIAS_BAND_1

String

Internal calibration bias method for band 1.

CORRECTION_BIAS_BAND_2

String

Internal calibration bias method for band 2.

CORRECTION_BIAS_BAND_3

String

Internal calibration bias method for band 3.

CORRECTION_BIAS_BAND_4

String

Internal calibration bias method for band 4.

CORRECTION_BIAS_BAND_5

String

Internal calibration bias method for band 5.

CORRECTION_BIAS_BAND_6_VCID_1

String

Internal calibration bias method for band 6_VICD_1.

CORRECTION_BIAS_BAND_6_VCID_2

String

Internal calibration bias method for band 6_VICD_2.

CORRECTION_BIAS_BAND_7

String

Internal calibration bias method for band 7.

CORRECTION_BIAS_BAND_8

String

Internal calibration bias method for band 8.

CORRECTION_GAIN_BAND_1

String

Internal calibration gain method for band 1.

CORRECTION_GAIN_BAND_2

String

Internal calibration gain method for band 2.

CORRECTION_GAIN_BAND_3

String

Internal calibration gain method for band 3.

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_VCID_1

String

Internal calibration gain method for band 6_VCID_1.

CORRECTION_GAIN_BAND_6_VCID_2

String

Internal calibration gain method for band 6_VCID_2.

CORRECTION_GAIN_BAND_7

String

Internal calibration gain method for band 7.

CORRECTION_GAIN_BAND_8

String

Internal calibration gain method for band 8.

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)

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_1

String

Gain state for Band 1. (L = Low gain, H = High)

GAIN_BAND_2

String

Gain state for Band 2. (L = Low gain, H = High)

GAIN_BAND_3

String

Gain state for Band 3. (L = Low gain, H = High)

GAIN_BAND_4

String

Gain state for Band 4. (L = Low gain, H = High)

GAIN_BAND_5

String

Gain state for Band 5. (L = Low gain, H = High)

GAIN_BAND_6_VCID_1

String

Gain state for Band 6 VCID_1. (L = Low gain, H = High)

GAIN_BAND_6_VCID_2

String

Gain state for Band 6 VCID_2. (L = Low gain, H = High)

GAIN_BAND_7

String

Gain state for Band 7. (L = Low gain, H = High)

GAIN_BAND_8

String

Gain state for Band 8. (L = Low gain, H = High)

GAIN_CHANGE_BAND_1

String

Presence and direction of gain change for Band 1 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).

GAIN_CHANGE_BAND_2

String

Presence and direction of gain change for Band 2 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).

GAIN_CHANGE_BAND_3

String

Presence and direction of gain change for Band 3 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).

GAIN_CHANGE_BAND_4

String

Presence and direction of gain change for Band 4 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).

GAIN_CHANGE_BAND_5

String

Presence and direction of gain change for Band 5 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).

GAIN_CHANGE_BAND_6_VCID_1

String

Presence and direction of gain change for Band 6 VCID_1 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).

GAIN_CHANGE_BAND_6_VCID_2

String

Presence and direction of gain change for Band 6 VCID_2 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).

GAIN_CHANGE_BAND_7

String

Presence and direction of gain change for Band 7 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).

GAIN_CHANGE_BAND_8

String

Presence and direction of gain change for Band 8 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).

GAIN_CHANGE_SCAN_BAND_1

Double

Scan line number where the first change in Band 1 gain was detected.

GAIN_CHANGE_SCAN_BAND_2

Double

Scan line number where the first change in Band 2 gain was detected.

GAIN_CHANGE_SCAN_BAND_3

Double

Scan line number where the first change in Band 3 gain was detected.

GAIN_CHANGE_SCAN_BAND_4

Double

Scan line number where the first change in Band 4 gain was detected.

GAIN_CHANGE_SCAN_BAND_5

Double

Scan line number where the first change in Band 5 gain was detected.

GAIN_CHANGE_SCAN_BAND_6_VCID_1

Double

Scan line number where the first change in Band 6 VCID 1 gain was detected.

GAIN_CHANGE_SCAN_BAND_6_VCID_2

Double

Scan line number where the first change in Band 6 VCID 2 gain was detected.

GAIN_CHANGE_SCAN_BAND_7

Double

Scan line number where the first change in Band 7 gain was detected.

GAIN_CHANGE_SCAN_BAND_8

Double

Scan line number where the first change in Band 8 gain was detected.

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.

GRID_CELL_SIZE_PANCHROMATIC

Double

Grid cell size used in creating the image for the panchromatic band.

GRID_CELL_SIZE_REFLECTIVE

Double

Grid cell size used in creating the image for the reflective band.

GRID_CELL_SIZE_THERMAL

Double

Grid cell size used in creating the image for the thermal 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

K1_CONSTANT_BAND_6_VCID_1

Double

Calibration K1 constant for Band 6 VCID 1 radiance to temperature conversion.

K1_CONSTANT_BAND_6_VCID_2

Double

Calibration K1 constant for Band 6 VCID 2 radiance to temperature conversion.

K2_CONSTANT_BAND_6_VCID_1

Double

Calibration K2 constant for Band 6 VCID 1 radiance to temperature conversion.

K2_CONSTANT_BAND_6_VCID_2

Double

Calibration K2 constant for Band 6 VCID 2 radiance to temperature conversion.

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

PANCHROMATIC_LINES

Double

Number of product lines for the panchromatic band.

PANCHROMATIC_SAMPLES

Double

Number of product samples for the panchromatic bands.

PROCESSING_SOFTWARE_VERSION

String

Name and version of the processing software used to generate the L1 product.

RADIANCE_ADD_BAND_1

Double

Additive rescaling factor used to convert calibrated DN to radiance for Band 1.

RADIANCE_ADD_BAND_2

Double

Additive rescaling factor used to convert calibrated DN to radiance for Band 2.

RADIANCE_ADD_BAND_3

Double

Additive rescaling factor used to convert calibrated DN to radiance for Band 3.

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_VCID_1

Double

Additive rescaling factor used to convert calibrated DN to radiance for Band 6 VCID 1.

RADIANCE_ADD_BAND_6_VCID_2

Double

Additive rescaling factor used to convert calibrated DN to radiance for Band 6 VCID 2.

RADIANCE_ADD_BAND_7

Double

Additive rescaling factor used to convert calibrated DN to radiance for Band 7.

RADIANCE_ADD_BAND_8

Double

Additive rescaling factor used to convert calibrated DN to radiance for Band 8.

RADIANCE_MAXIMUM_BAND_1

Double

Maximum achievable spectral radiance value for Band 1.

RADIANCE_MAXIMUM_BAND_2

Double

Maximum achievable spectral radiance value for Band 2.

RADIANCE_MAXIMUM_BAND_3

Double

Maximum achievable spectral radiance value for Band 3.

RADIANCE_MAXIMUM_BAND_4

Double

Maximum achievable spectral radiance value for Band 4.

RADIANCE_MAXIMUM_BAND_5

Double

Maximum achievable spectral radiance value for Band 5.

RADIANCE_MAXIMUM_BAND_6_VCID_1

Double

Maximum achievable spectral radiance value for Band 6 VCID 1.

RADIANCE_MAXIMUM_BAND_6_VCID_2

Double

Maximum achievable spectral radiance value for Band 6 VCID 2.

RADIANCE_MAXIMUM_BAND_7

Double

Maximum achievable spectral radiance value for Band 7.

RADIANCE_MAXIMUM_BAND_8

Double

Maximum achievable spectral radiance value for Band 8.

RADIANCE_MINIMUM_BAND_1

Double

Minimum achievable spectral radiance value for Band 1.

RADIANCE_MINIMUM_BAND_2

Double

Minimum achievable spectral radiance value for Band 2.

RADIANCE_MINIMUM_BAND_3

Double

Minimum achievable spectral radiance value for Band 3.

RADIANCE_MINIMUM_BAND_4

Double

Minimum achievable spectral radiance value for Band 4.

RADIANCE_MINIMUM_BAND_5

Double

Minimum achievable spectral radiance value for Band 5.

RADIANCE_MINIMUM_BAND_6_VCID_1

Double

Minimum achievable spectral radiance value for Band 6 VCID 1.

RADIANCE_MINIMUM_BAND_6_VCID_2

Double

Minimum achievable spectral radiance value for Band 6 VCID 2.

RADIANCE_MINIMUM_BAND_7

Double

Minimum achievable spectral radiance value for Band 7.

RADIANCE_MINIMUM_BAND_8

Double

Minimum achievable spectral radiance value for Band 8.

RADIANCE_MULT_BAND_1

Double

Multiplicative rescaling factor used to convert calibrated Band 1 DN to radiance.

RADIANCE_MULT_BAND_2

Double

Multiplicative rescaling factor used to convert calibrated Band 2 DN to radiance.

RADIANCE_MULT_BAND_3

Double

Multiplicative rescaling factor used to convert calibrated Band 3 DN to radiance.

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_VCID_1

Double

Multiplicative rescaling factor used to convert calibrated Band 6 VCID 1 DN to radiance.

RADIANCE_MULT_BAND_6_VCID_2

Double

Multiplicative rescaling factor used to convert calibrated Band 6 VCID 2 DN to radiance.

RADIANCE_MULT_BAND_7

Double

Multiplicative rescaling factor used to convert calibrated Band 7 DN to radiance.

RADIANCE_MULT_BAND_8

Double

Multiplicative rescaling factor used to convert calibrated Band 8 DN to radiance.

REFLECTANCE_ADD_BAND_1

Double

Additive rescaling factor used to convert calibrated Band 1 DN to reflectance.

REFLECTANCE_ADD_BAND_2

Double

Additive rescaling factor used to convert calibrated Band 2 DN to reflectance.

REFLECTANCE_ADD_BAND_3

Double

Additive rescaling factor used to convert calibrated Band 3 DN to reflectance.

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_7

Double

Additive rescaling factor used to convert calibrated Band 7 DN to reflectance.

REFLECTANCE_ADD_BAND_8

Double

Additive rescaling factor used to convert calibrated Band 8 DN to reflectance.

REFLECTANCE_MAXIMUM_BAND_1

Double

Maximum achievable spectral reflectance value for Band 1.

REFLECTANCE_MAXIMUM_BAND_2

Double

Maximum achievable spectral reflectance value for Band 2.

REFLECTANCE_MAXIMUM_BAND_3

Double

Maximum achievable spectral reflectance value for Band 3.

REFLECTANCE_MAXIMUM_BAND_4

Double

Maximum achievable spectral reflectance value for Band 4.

REFLECTANCE_MAXIMUM_BAND_5

Double

Maximum achievable spectral reflectance value for Band 5.

REFLECTANCE_MAXIMUM_BAND_7

Double

Maximum achievable spectral reflectance value for Band 7.

REFLECTANCE_MAXIMUM_BAND_8

Double

Maximum achievable spectral reflectance value for Band 8.

REFLECTANCE_MINIMUM_BAND_1

Double

Minimum achievable spectral reflectance value for Band 1.

REFLECTANCE_MINIMUM_BAND_2

Double

Minimum achievable spectral reflectance value for Band 2.

REFLECTANCE_MINIMUM_BAND_3

Double

Minimum achievable spectral reflectance value for Band 3.

REFLECTANCE_MINIMUM_BAND_4

Double

Minimum achievable spectral reflectance value for Band 4.

REFLECTANCE_MINIMUM_BAND_5

Double

Minimum achievable spectral reflectance value for Band 5.

REFLECTANCE_MINIMUM_BAND_7

Double

Minimum achievable spectral reflectance value for Band 7.

REFLECTANCE_MINIMUM_BAND_8

Double

Minimum achievable spectral reflectance value for Band 8.

REFLECTANCE_MULT_BAND_1

Double

Multiplicative factor used to convert calibrated Band 1 DN to reflectance.

REFLECTANCE_MULT_BAND_2

Double

Multiplicative factor used to convert calibrated Band 2 DN to reflectance.

REFLECTANCE_MULT_BAND_3

Double

Multiplicative factor used to convert calibrated Band 3 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_7

Double

Multiplicative factor used to convert calibrated Band 7 DN to reflectance.

REFLECTANCE_MULT_BAND_8

Double

Multiplicative factor used to convert calibrated Band 8 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_1

String

Flag indicating saturated pixels for band 1 ('Y'/'N')

SATURATION_BAND_2

String

Flag indicating saturated pixels for band 2 ('Y'/'N')

SATURATION_BAND_3

String

Flag indicating saturated pixels for band 3 ('Y'/'N')

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_VCID_1

String

Flag indicating saturated pixels for band 6 VCID 1 ('Y'/'N')

SATURATION_BAND_6_VCID_2

String

Flag indicating saturated pixels for band 6 VCID 2 ('Y'/'N')

SATURATION_BAND_7

String

Flag indicating saturated pixels for band 7 ('Y'/'N')

SATURATION_BAND_8

String

Flag indicating saturated pixels for band 8 ('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.

SENSOR_MODE

String

Operational mode. Scan Angle Monitor (SAM) or BUMPER.

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.

THERMAL_LINES

Double

Number of product lines for the thermal band.

THERMAL_SAMPLES

Double

Number of product samples for the thermal band.

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).

使用说明：

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数据集是联邦创建的数据，因此属于公共领域，可以在没有版权限制的情况下使用、转让或复制。

对美国地质调查局作为数据来源的确认或信用，应通过包括一行文字引用来提供，如下面的例子。

(产品、图像、照片或数据集名称）由美国地质调查局提供。

例子。Landsat-7图像由美国地质调查局提供

请参阅美国地质调查局视觉识别系统指南，了解有关美国地质调查局产品的正确引用和鸣谢的进一步细节。

代码：

代码语言：javascript复制
var dataset = ee.ImageCollection('LANDSAT/LE07/C01/T1_32DAY_TOA')
                  .filterDate('1999-01-01', '2002-12-31');
var trueColor = dataset.select(['B3', 'B2', 'B1']);
var trueColorVis = {
  min: 0,
  max: 0.4,
  gamma: 1.2,
};
Map.setCenter(-3.7408, 40.4386, 8);
Map.addLayer(trueColor, trueColorVis, 'True Color (321)');

代码：

代码语言：javascript复制
var dataset = ee.ImageCollection('LANDSAT/LE07/C01/T1_8DAY_TOA')
                  .filterDate('1999-01-01', '2002-12-31');
var trueColor = dataset.select(['B3', 'B2', 'B1']);
var trueColorVis = {
  min: 0,
  max: 0.4,
  gamma: 1.2,
};
Map.setCenter(-3.7408, 40.4386, 8);
Map.addLayer(trueColor, trueColorVis, 'True Color (321)');

代码：

代码语言：javascript复制
var dataset = ee.ImageCollection('LANDSAT/LE07/C01/T1_ANNUAL_TOA')
                  .filterDate('1999-01-01', '2006-12-31');
var trueColor = dataset.select(['B3', 'B2', 'B1']);
var trueColorVis = {
  min: 0,
  max: 0.4,
  gamma: 1.2,
};
Map.setCenter(-3.7408, 40.4386, 8);
Map.addLayer(trueColor, trueColorVis, 'True Color (321)');
double google string 数据

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