GEE云平台——Landsat8系列和使用图像所需的相关质量信息
【摘要】 This chapter provides an overview of the Landsat collections and relevant quality information necessary for using the imagery.本节概述了Landsat8系列和使用图像所需的相关质量信息。Landsat platform.Landsat processing tie...
This chapter provides an overview of the Landsat collections and relevant quality information necessary for using the imagery.
本节概述了Landsat8系列和使用图像所需的相关质量信息。
Landsat platform.
Landsat 8¶
Landsat 8 collection.
Surface Reflectance (SR)¶
-
USGS Landsat 8 Surface Reflectance Tier 1
-
USGS Landsat 8 Surface Reflectance Tier 2
Top of Atmosphere (TOA)¶
-
USGS Landsat 8 Collection 1 Tier 1 TOA Reflectance
-
USGS Landsat 8 Collection 1 Tier 1 and Real-Time data TOA Reflectance
-
USGS Landsat 8 Collection 1 Tier 2 TOA Reflectance
Raw Images¶
-
USGS Landsat 8 Collection 1 Tier 1 Raw Scenes
-
USGS Landsat 8 Collection 1 Tier 1 and Real-Time data Raw Scenes
-
USGS Landsat 8 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 6 of the Landsat 8 Collection 1 (C1) Land Surface Reflectance Code (LaSRC) product guide provides information related to the SR specifications as well to the data quality measurements.
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_pixel_qa
|
Level 2 Quality Band
|
16-Bit Unsigned Integer
|
Bit Index
|
0 - 32768
|
0 - 32768
|
1 (Bit 0)
|
NA
|
NA
|
|
ProductID_sr_aerosol
|
Aerosol QA
|
8-Bit Unsigned Integer
|
Bit Index
|
0 - 255
|
0 - 255
|
NA
|
NA
|
NA
|
|
ProductID_radsat_qa
|
Radiometric Saturation QA
|
16-Bit Unsigned Integer
|
Bit Index
|
0 - 32768
|
0 - 32768
|
1 (Bit 0)
|
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
|
Pixel Quality Assessment (QA) Band¶
|
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 |
|
8-9
|
256 / 512
|
511 / 1023
|
Cirrus Confidence
00 (0) = Not Set 01 (1) = Low from OLI Band 9 Reflectance 10 (2) = Medium from OLI Band 9 Reflectance (Not Used) 11 (3) = High from OLI Band 9 Reflectance |
|
10
|
1024
|
2047
|
Terrain Occlusion
|
|
11
|
2048
|
4095
|
Unused
|
|
12
|
4096
|
8191
|
Unused
|
|
13
|
8192
|
16383
|
Unused
|
|
14
|
16384
|
32767
|
Unused
|
|
15
|
32768
|
655535
|
Unused
|
|
Attribute
|
Pixel Value
|
|---|---|
|
Fill
|
1
|
|
Clear
|
322, 386, 834, 898, 1346
|
|
Water
|
324, 388, 836, 900, 1348
|
|
Cloud Shadow
|
328, 392, 840, 904, 1350
|
|
Snow/Ice
|
336, 368, 400, 432, 848, 880, 912, 944, 1352
|
|
Cloud
|
352, 368, 416, 432, 480, 864, 880, 928, 944, 992
|
|
Low Confidence Cloud
|
322, 324, 328, 336, 352, 368, 834, 836, 840, 848, 864, 880
|
|
Medium Confidence Cloud
|
386, 388, 392, 400, 416, 432, 898, 900, 904, 928, 944
|
|
High Confidence Cloud
|
480, 992
|
|
Low Confidence Cirrus
|
322, 324, 328, 336, 352, 368, 386, 388, 392, 400, 416, 432, 480
|
|
High Confidence Cirrus
|
834, 836, 840, 848, 864, 880,898,900, 904, 912, 928, 944, 992
|
|
Terrain Occlusion
|
1346, 1348, 1350, 135
|
Radiometric Saturation QA Band¶
|
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
|
|
9
|
512
|
1023
|
Band 9 Data Saturation Flag (0 valid data, 1 saturated data)
|
|
10
|
1024
|
2047
|
Band 10 Data Saturation Flag (0 valid data, 1 saturated data)
|
|
11
|
2048
|
4095
|
Band 11 Data Saturation Flag (0 valid data, 1 saturated data)
|
Surface Reflectance Aerosol Band¶
|
Bit
|
Bit Value
|
Cumulative Sum
|
Attribute
|
|---|---|---|---|
|
0
|
1
|
1
|
Fill
|
|
1
|
2
|
3
|
Valid Aerosol Retrieval (center pixel of 3x3 pixel window)
|
|
2
|
4
|
7
|
Water Pixel (or water pixel was used in the fill-the-window interpolation)
|
|
3
|
8
|
15
|
Cloud or Cirrus
|
|
4
|
16
|
31
|
Cloud Shadow
|
|
5
|
32
|
63
|
Non-center window pixel for which aerosol was interpolated from surrounding 3x3 window center pixels
|
|
6-7
|
64 / 128
|
127 / 255
|
Aerosol Level
00 (0) = Climatology 01 (1) = Low 10 (2) = Medium 11 (3) = High |
|
Attribute
|
Pixel Value
|
|---|---|
|
Fill
|
1
|
|
Valid Aerosol Retrieval (center pixel of 3x3 window)
|
2,66, 130, 194
|
|
Water Pixel (or water pixel was used in the fill-the-window interpolation)
|
4, 68, 100, 132, 164, 196, 228
|
|
Cloud or Cirrus
|
8, 72, 136, 200
|
|
Cloud Shadow
|
16, 80, 144, 208
|
|
Non-center window pixel for which aerosol was interpolated from surrounding 3x3 center pixels
|
32, 96, 100, 160, 164, 224, 228
|
|
Low-level aerosol
|
66, 68, 72, 80, 96, 100
|
|
Medium-level aerosol
|
130, 132, 136, 144, 160, 164
|
|
High-level aerosol
|
194, 196, 200, 208, 224, 228
|
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