Google Earth Engine（GEE）——统一的全球夜间灯光数据集（1992-2020年）
Google Earth Engine（GEE）——统一的全球夜间灯光数据集（1992-2020年）
统一的全球夜间灯光（1992-2020年） 在这项研究中，作者通过协调来自DMSP数据的相互校准的NTL观测值和来自VIIRS数据的模拟的类似DMSP的NTL观测值，在全球范围内生成了一个综合的、一致的NTL数据集。生成的全球DMSP NTL时间序列数据（1992-2018）显示出一致的时间趋势。这个时间上扩展的DMSP NTL数据集为与人类活动有关的各种研究提供了宝贵的支持，如电力消耗和城市范围动态。该数据集包含
1992-2013年经过时间校准的DMSP-OLS NTL时间序列数据；以及 从VIIRS数据中转换的NTL时间序列（2014-2020）。 空间分辨率：30角秒（约1公里）。
作者建议使用DN值大于7的像素。
来自国防气象卫星计划（DMSP）/作业线扫描系统（OLS）和苏米国家极轨合作卫星上的可见光红外成像辐射仪套件（VIIRS）的夜间光照（NTL）数据为监测从区域到全球范围的人类活动提供了一个巨大的机会。尽管DMSP（1992-2013年）和VIIRS（2012-2018年）提供了宝贵的夜景记录，但由于DMSP和VIIRS之间的严重不一致，NTL观测的历史档案的潜力还没有被充分挖掘出来。在这项研究中，我们通过协调来自DMSP数据的相互校准的NTL观测数据和来自VIIRS数据的模拟的类似DMSP的NTL观测数据，在全球范围内生成了一个综合的、一致的NTL数据集。生成的全球DMSP NTL时间序列数据（1992-2018）显示出一致的时间趋势。这个时间上扩展的DMSP NTL数据集为与人类活动有关的各种研究提供了宝贵的支持，如电力消耗和城市范围动态。
Harmonization of DMSP and VIIRS nighttime light data from 1992-2020 at the global scale
Data Citation¶
Li, Xuecao; Zhou, Yuyu; zhao, Min; Zhao, Xia (2020): Harmonization of DMSP and VIIRS nighttime
light data from 1992-2020 at the global scale. figshare. Dataset.
https://doi.org/10.6084/m9.figshare.9828827.v5Paper Citation¶
Li, Xuecao, Yuyu Zhou, Min Zhao, and Xia Zhao. "A harmonized global nighttime light dataset 1992–2018." Scientific data 7, no. 1 (2020): 1-9.
Earth Engine Snippet¶
var dmsp = ee.ImageCollection("projects/sat-io/open-datasets/Harmonized_NTL/dmsp");
var viirs = ee.ImageCollection("projects/sat-io/open-datasets/Harmonized_NTL/viirs");
var dmsp = ee.ImageCollection("projects/sat-io/open-datasets/Harmonized_NTL/dmsp"),
viirs = ee.ImageCollection("projects/sat-io/open-datasets/Harmonized_NTL/viirs");
var viz = ["67001f","b2182b","d6604d","f4a582","fddbc7","ffffff","e0e0e0","bababa","878787","4d4d4d"].reverse()
Map.addLayer(dmsp.first(),{'min':50,'max':65,'palette':viz},'DMSP NTL 1992')
Map.addLayer(viirs.sort('system:time_start',false).first().updateMask(ee.Image(viirs.sort('system:time_start',false).first()).gte(50)),{'min':50,'max':65,'palette':viz},'Harmonized Simulated VIIRS NTL 2020')
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Map.setOptions('Dark', {Dark
: Dark
})License¶
This work is licensed under the Creative Commons Attribution 4.0 International License (Creative Commons — Attribution 4.0 International — CC BY 4.0). Users are free to use, copy, distribute, transmit, and adapt the work for commercial and non-commercial purposes, without restriction, as long as clear attribution of the source is provided.
Created by: Xuecao Li et al
Curated by: Samapriya Roy
Keywords: : DMSP/OLS data, VIIRS, nighttime light, calibration, consistent, global
Last updated: 2021-11-26