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社区首页 >专栏 >Landsat 8 Landsat8 Collection2表面反射率数据

Landsat 8 Landsat8 Collection2表面反射率数据

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发布2024-05-24 09:19:11
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发布2024-05-24 09:19:11
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简介

Landsat8 Collection2表面反射率数据,属Collection2二级数据产品,分辨率为30米,基于陆地表面反射率代码(LaSRC)(版本1.5.0)生成,该算法利用沿海气溶胶波段进行气溶胶反演测试,还利用了MODIS的辅助气候数据和独特的辐射传输模型。 此外,LaSRC算法将观测天顶角硬编码为“0”,太阳天顶角和观测天顶角作为大气校正的一部分参与计算。

Landsat 8 Collection 2 Surface Reflectance Data 是一种由美国地质调查局(USGS)提供的遥感数据产品,用于监测和研究地球表面的反射率。该数据集基于Landsat 8 OLI(Operational Land Imager)传感器收集的遥感图像,并经过大量的预处理和校正,以提供具有较高质量和一致性的表面反射率数据。

Landsat 8 Collection 2 Surface Reflectance Data 提供了对地球表面的多波段、多时期遥感影像进行处理和校正后的结果。这些影像包括可见光、近红外、红外和短波红外波段,可以用于监测陆地、水域和大气的变化、研究植被生长和覆盖、土地利用和土地覆盖分类等应用。

Landsat 8 Collection 2 Surface Reflectance Data 还提供了一些附加的衍生产品,如植被指数(如NDVI和EVI)、地表温度数据等。这些衍生产品可以用于进一步的地表研究和分析。

Landsat 8 Collection 2 Surface Reflectance Data 可以免费获取,并且可以通过USGS的EarthExplorer网站或其他相关的数据下载平台获得。数据以GeoTIFF格式存储,并可以与地理信息系统(GIS)软件进行集成和分析。

数据集ID:

LC08/02/SR

时间范围: 2013年03月-现在

范围: 全国

来源: USGS

复制代码段:

var images = pie.ImageCollection("LC08/02/SR")

波段

名称

单位

类型

值域范围

填充值

乘法比例因子

加性比例因子

描述信息

B1

Reflectance

uint16

7273~43636

0

0.0000275

-0.2

Band 1 SR

B2

Reflectance

uint16

7273~43636

0

0.0000275

-0.2

Band 2 SR

B3

Reflectance

uint16

7273~43636

0

0.0000275

-0.2

Band 3 SR

B4

Reflectance

uint16

7273~43636

0

0.0000275

-0.2

Band 4 SR

B5

Reflectance

uint16

7273~43636

0

0.0000275

-0.2

Band 5 SR

B6

Reflectance

uint16

1~65535

0

0.0000275

-0.2

Band 6 SR

B7

Reflectance

uint16

7273~43636

0

0.0000275

-0.2

Band 7 SR

B10

Kelvin

uint16

1~65535

0

0.00341802

149

Band 10 ST

QA_PIXEL

Bit Index

uint16

21824~65534

1

-

-

Level 2 Pixel Quality Band

SR_QA_AEROSOL

Bit Index

uint8

0~255

1

-

-

Aerosol QA

QA_RADSAT

Bit Index

uint16

0~3829

32768

-

-

Radiometric Saturation QA

ST_QA

Kelvin

int16

0~32767

-9999

0.01

-

Surface Temperature Uncertainty

ST_TRAN

W/(m 2.sr.μm)/ DN

int16

0~22000

-9999

0.001

-

Thermal Band in Radiance

ST_URAD

W/(m 2.sr.μm)/ DN

int16

0~28000

-9999

0.001

-

Upwelled Radiance

ST_DRAD

W/(m 2.sr.μm)/ DN

int16

0~28000

-9999

0.001

-

Downwelled Radiance

ST_ATRAD

Unitless

int16

0~10000

-9999

0.0001

-

Atmospheric Transmittance

ST_EMIS

Unitless

int16

0~10000

-9999

0.0001

-

Emissivity estimated from ASTER GED

ST_EMSD

Unitless

int16

0~10000

-9999

0.0001

-

Emissivity standard deviation

ST_CDIST

Kilometers

int16

0~24000

-9999

0.01

-

Pixel distance to cloud

QA_PIXEL Bit Index

Bit 0: Fill 0: Image data1: Fill dataBit 1: Dilated Cloud 0: Cloud is not dilated or no cloud1: Cloud dilationBit 2: Cirrus 0: Cirrus Confidence: no confidence level set or Low Confidence1: High confidence cirrusBit 3: Cloud 0: Cloud confidence is not high1: High confidence cloudBit 4: Cloud shadow 0: Cloud Shadow Confidence is not high1: High confidence cloud shadowBit 5: Snow 0: Snow/Ice Confidence is not high1: High confidence snow coverBit 6: Clear 0: Cloud or Dilated Cloud bits are set1: Cloud and Dilated Cloud bits are not setBit 7: Water 0: Land or cloud1: WaterBits 8-9: Cloud Confidence 00: No confidence level set01: Low confidence10: Medium confidence11: High confidenceBits 10-11: Cloud Shadow Confidence 00: No confidence level set01: Low confidence10: Reserved11: High confidenceBits 12-13: Snow/Ice Confidence 00: No confidence level set01: Low confidence10: Reserved11: High confidenceBits 14-15: Cirrus Confidence 00: No confidence level set01: Low confidence10: Reserved11: High confidence

  • Bit 0: Fill
    • 0: Image data
    • 1: Fill data
  • Bit 1: Dilated Cloud
    • 0: Cloud is not dilated or no cloud
    • 1: Cloud dilation
  • Bit 2: Cirrus
    • 0: Cirrus Confidence: no confidence level set or Low Confidence
    • 1: High confidence cirrus
  • Bit 3: Cloud
    • 0: Cloud confidence is not high
    • 1: High confidence cloud
  • Bit 4: Cloud shadow
    • 0: Cloud Shadow Confidence is not high
    • 1: High confidence cloud shadow
  • Bit 5: Snow
    • 0: Snow/Ice Confidence is not high
    • 1: High confidence snow cover
  • Bit 6: Clear
    • 0: Cloud or Dilated Cloud bits are set
    • 1: Cloud and Dilated Cloud bits are not set
  • Bit 7: Water
    • 0: Land or cloud
    • 1: Water
  • Bits 8-9: Cloud Confidence
    • 00: No confidence level set
    • 01: Low confidence
    • 10: Medium confidence
    • 11: High confidence
  • Bits 10-11: Cloud Shadow Confidence
    • 00: No confidence level set
    • 01: Low confidence
    • 10: Reserved
    • 11: High confidence
  • Bits 12-13: Snow/Ice Confidence
    • 00: No confidence level set
    • 01: Low confidence
    • 10: Reserved
    • 11: High confidence
  • Bits 14-15: Cirrus Confidence
    • 00: No confidence level set
    • 01: Low confidence
    • 10: Reserved
    • 11: High confidence

QA_RADSAT Bit Index

Bit 0: Band 1 Data Saturation 0: No saturation1: Saturated dataBit 1: Band 2 Data Saturation 0: No saturation1: Saturated dataBit 2: Band 3 Data Saturation 0: No saturation1: Saturated dataBit 3: Band 4 Data Saturation 0: No saturation1: Saturated dataBit 4: Band 5 Data Saturation 0: No saturation1: Saturated dataBit 5: Band 6 Data Saturation 0: No saturation1: Saturated dataBit 6: Band 7 Data Saturation 0: No saturation1: Saturated dataBit 8: Band 9 Data Saturation 0: No saturation1: Saturated dataBit 11: Terrain occlusion 0: No terrain occlusion1: Terrain occlusion

  • Bit 0: Band 1 Data Saturation
    • 0: No saturation
    • 1: Saturated data
  • Bit 1: Band 2 Data Saturation
    • 0: No saturation
    • 1: Saturated data
  • Bit 2: Band 3 Data Saturation
    • 0: No saturation
    • 1: Saturated data
  • Bit 3: Band 4 Data Saturation
    • 0: No saturation
    • 1: Saturated data
  • Bit 4: Band 5 Data Saturation
    • 0: No saturation
    • 1: Saturated data
  • Bit 5: Band 6 Data Saturation
    • 0: No saturation
    • 1: Saturated data
  • Bit 6: Band 7 Data Saturation
    • 0: No saturation
    • 1: Saturated data
  • Bit 8: Band 9 Data Saturation
    • 0: No saturation
    • 1: Saturated data
  • Bit 11: Terrain occlusion
    • 0: No terrain occlusion
    • 1: Terrain occlusion

QA_AEROSOL Bit Index

Bit 0: Fill 0: Pixel is not fill1: Pixel is fillBit 1: Valid aerosol retrieval 0: Pixel retrieval is not valid1: Pixel retrieval is validBit 2: Water 0: Pixel is not water1: Pixel is waterBit 5: Interpolated Aerosol 0: Pixel is not aerosol interpolated1: Pixel is aerosol interpolatedBits 6-7: Aerosol Level 00: Climatology01: Low10: Medium11: High

  • Bit 0: Fill
    • 0: Pixel is not fill
    • 1: Pixel is fill
  • Bit 1: Valid aerosol retrieval
    • 0: Pixel retrieval is not valid
    • 1: Pixel retrieval is valid
  • Bit 2: Water
    • 0: Pixel is not water
    • 1: Pixel is water
  • Bit 5: Interpolated Aerosol
    • 0: Pixel is not aerosol interpolated
    • 1: Pixel is aerosol interpolated
  • Bits 6-7: Aerosol Level
    • 00: Climatology
    • 01: Low
    • 10: Medium
    • 11: High

属性

landsat_product_id

string

影像名称

processing_level

string

产品级别

date_acquired

string

拍摄日期(ISO 8601格式)

collection_category

string

影像质量级别属性,如T2,T1等

cloud_cover

float

云量覆盖百分比,-1表示未计算

sun_azimuth

double

太阳方位角

sun_elevation

double

太阳高度角

sensor_id

string

传感器类型

wrs_path

int

条带号

wrs_row

int

行编号

date

string

影像日期

代码:

代码语言:javascript
复制
/**
 * @File    :   HelloPIE
 * @Time    :   2020/7/21
 * @Author  :   piesat
 * @Version :   1.0
 * @Contact :   400-890-0662
 * @License :   (C)Copyright 航天宏图信息技术股份有限公司
 * @Desc    :   时空计算云服务平台的入门程序
 */
//地图居中并且缩放到第6级别
Map.setCenter(120.254, 41.726, 6);
//设置显示显示参数
var visParam = {
    min: 0,
    max: 0.3,
    bands: ["B4","B3","B2"]
};
//加载指定的影像数据数据,筛选特定的波段数据
var image = pie.Image("LC08/02/SR/LC08_121031_20170101")
               .select(["B4","B3","B2"])
               .multiply(0.0000275)
               .subtract(0.2);
//输出影像的信息
print("image", image);
//加载显示影像
Map.addLayer(image, visParam, "image");
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原始发表:2024-03-27,如有侵权请联系 cloudcommunity@tencent.com 删除

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