Google Earth Engine ——Landsat 7 影像集合数据集详细介绍-Toy模板网

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Landsat 7¶

Landsat 7 collection.

Surface Reflectance¶

USGS Landsat 7 Surface Reflectance Tier 1
USGS Landsat 7 Surface Reflectance Tier 2

Top of Atmosphere (TOA)¶

USGS Landsat 7 Collection 1 Tier 1 TOA Reflectance
USGS Landsat 7 Collection 1 Tier 1 and Real-Time data TOA Reflectance
USGS Landsat 7 Collection 1 Tier 2 TOA Reflectance

Raw Images¶

USGS Landsat 7 Collection 1 Tier 1 Raw Scenes
USGS Landsat 7 Collection 1 Tier 1 and Real-Time data Raw Scenes
USGS Landsat 7 Collection 1 Tier 2 Raw Scenes

Derived Datasets¶

Burned Area Index (BAI)
Enhanced Vegetation Index (EVI)
Normalized Difference Vegetation Index (NDVI)
Normalized Burn Ratio Thermal (NBRT)
Normalized Difference Snow Index (NDSI)
Normalized Difference Water Index (NDWI)

Specifications and Quality¶

Section 5 of the Landsat 4-7 Collection 1 (C1) Surface Reflectance Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) product guide provides information related to the SR specifications as well to the data quality measurements.

Surface Reflectance Specifications¶

Table 7 Landsat 4-7 Surface Reflectance Specifications ¶
Band Designation	Band Name	Data Type	Units	Range	Valid Range	Fill Value	Saturate Value	Scale Factor
ProductID_sr_band1	Band 1	16-Bit Signed Integer	Reflectance	-2000 - 16000	0 - 10000	-9999	20000	0.0001
ProductID_sr_band2	Band 2	16-Bit Signed Integer	Reflectance	-2000 - 16000	0 - 10000	-9999	20000	0.0001
ProductID_sr_band3	Band 3	16-Bit Signed Integer	Reflectance	-2000 - 16000	0 - 10000	-9999	20000	0.0001
ProductID_sr_band4	Band 4	16-Bit Signed Integer	Reflectance	-2000 - 16000	0 - 10000	-9999	20000	0.0001
ProductID_sr_band5	Band 5	16-Bit Signed Integer	Reflectance	-2000 - 16000	0 - 10000	-9999	20000	0.0001
ProductID_sr_band6	Band 6	16-Bit Signed Integer	Reflectance	-2000 - 16000	0 - 10000	-9999	20000	0.0001
ProductID_sr_band7	Band 7	16-Bit Signed Integer	Reflectance	-2000 - 16000	0 - 10000	-9999	20000	0.0001
ProductID_sr_atmos_opacity	Atmospheric Opacity	16-Bit Signed Integer	Unitless	-2000 - 16000	0 - 10000	-9999	NA	0.0010
ProductID_pixel_qa	Level 2 Quality Band	16-Bit Unsigned Integer	Bit Index	0 - 32768	0 - 32768	1 (Bit 0)	NA	NA
ProductID_radsat_qa	Radiometric Saturation QA	16-Bit Unsigned Integer	Bit Index	0 - 32768	0 - 32768	1 (Bit 0)	NA	NA
ProductID_sr_cloud_qa	Surface Reflectance Cloud QA	8-Bit Unsigned Integer	Bit Index	0 - 255	0 - 63	NA	NA	NA
ProductID_MTL.txt	Level 1 Metadata File	NA	NA	NA	NA	NA	NA	NA
ProductID_ANG.txt	Level 1 Angle Coefficient File	NA	NA	NA	NA	NA	NA	NA

Surface Reflectance Cloud Quality Assessment Band¶

Table 8 Landsat 4-7 Surface Reflectance Cloud Quality Assessment Bit Index ¶
Bit	Attribute
0	Dark Dense Vegetation (DDV)
1	Cloud
2	Cloud Shadow
3	Adjacent to Cloud
4	Snow
5	Water
6	Unused
7	Unused

Table 9 Landsat 4-7 Surface Reflectance Cloud Quality Assessment Values ¶
Attribute	Pixel Value
DDV	1, 9
Cloud	2, 34
Cloud Shadow	4, 12, 20, 36, 52
Adjacent to Cloud	8, 12, 24, 40, 56
Snow	16, 20, 24, 48, 52, 56
Water	32, 34, 36, 40, 48, 52, 56

Pixel Quality Assessment Band¶

Table 10 Landsat 4-7 Pixel Quality Assessment Bit Index ¶
Bit	Bit Value	Cumulative Sum	Attribute
0	1	1	Fill
1	2	3	Clear
2	4	7	Water
3	8	15	Cloud Shadow
4	16	31	Snow
5	32	63	Cloud
6-7	64 / 128	127 / 255	Cloud Confidence 00 (0) = None 01 (1) = Low 10 (2) = Medium 11 (3) = High
8	256	511	Unused
9	512	1023	Unused
10	1024	2047	Unused
11	2048	4095	Unused
12	4096	8191	Unused
13	8192	16383	Unused
14	16384	32767	Unused
15	32768	65535	Unused

Table 11 Landsat 4-7 Pixel Quality Assessment Values ¶
Attribute	Pixel Value
Fill	1
Clear	66, 130
Water	68, 132
Cloud Shadow	72, 136
Snow/Ice	80, 112, 144, 176
Cloud	96, 112, 160, 176, 224
Low Confidence Cloud	66, 68, 72, 80, 96, 112
Medium Confidence Cloud	130, 132, 136, 144, 160, 176
High Confidence Cloud	224

Radiometric Saturation Quality Assessment Band¶

Table 12 Landsat 4-7 Radiometric Saturation Quality Assessment Bit Index ¶
Bit	Bit Value	Cumulative Sum	Description
0	1	1	Data Fill Flag (0 valid data, 1 invalid data)
1	2	3	Band 1 Data Saturation Flag (0 valid data, 1 saturated data)
2	4	7	Band 2 Data Saturation Flag (0 valid data, 1 saturated data)
3	8	15	Band 3 Data Saturation Flag (0 valid data, 1 saturated data)
4	16	31	Band 4 Data Saturation Flag (0 valid data, 1 saturated data)
5	32	63	Band 5 Data Saturation Flag (0 valid data, 1 saturated data)
6	64	127	Band 6 Data Saturation Flag (0 valid data, 1 saturated data)
7	128	255	Band 7 Data Saturation Flag (0 valid data, 1 saturated data)
8	NA	NA	Not Used文章来源地址https://www.toymoban.com/news/detail-426627.html