“珞珈一号”夜光数据在漓江流域城镇信息提取中的应用  

The Application of"LJ1-01"Nighttime Light Data in the Information Extraction of Towns in Lijiang River Basin

作　　者：欧晓华 梁保平[1] OU Xiaohua;LIANG Baoping(College of Environment and Resources,Guangxi Normal University,Guilin 541004,China)

机构地区：[1]广西师范大学环境与资源学院,广西桂林541004

出　　处：《测绘与空间地理信息》2022年第10期18-22,共5页Geomatics & Spatial Information Technology

基　　金：国家自然科学基金项目(42061045);广西自然科学基金项目(2018GXNSFAA050060)资助。

摘　　要：城市的空间结构和扩展情况是研究城市发展的重点,利用夜光数据可以有效地提取出城镇信息,珞珈一号夜光数据的分辨率较高,但目前对珞珈一号夜光影像的研究不多。本文以广西壮族自治区桂林市的漓江流域为研究区域,采用简单阈值法和城市夜间灯光指数法分别从NPP-VIIRS夜光数据和珞珈一号夜光数据中提取漓江流域的城镇信息,比较了两种提取城镇信息方法的优劣以及NPP-VIIRS夜光数据和珞珈一号夜光数据在提取小区域城镇信息的精度,并分析珞珈一号夜光数据在实际提取小区域城镇信息的可行性。结果得出:利用城市指数法从珞珈一号夜光数据提取城镇信息较为清晰,提取结果的Kappa系数为0.7293,高于NPP-VIIRS夜光数据的提取结果。The spatial structure and expansion of cities are the focus of research on urban development.Using nighttime light data can effectively extract urban information.The resolution of"LJ1-01"nighttime light data is higher.However,there are not many researches on the"LJ1-01"nighttime light image.This paper uses the Lijiang river basin in Guilin city whichbelongto Guangxi province as the research area,and extractstheinformation of towns in Lijiang river basin is from the NPP-VIIRS nighttime light data and the"LJ1-01"nighttime light data respectively by using the simple threshold method and the city night light index method.It compares the pros and cons of the two methods for extracting town information,as well as the accuracy of NPP-VIIRS nighttime light data and"LJ1-01"nighttime light data in extracting small area town information,and analyzingthe feasibility ofextracting town information from"LJ1-01"nighttime light data in small areas.The resultsshow that the urban information extracted from"LJ1-01"nighttime light data using the city index method is relatively clear,and the Kappa coefficient of the extraction result is 0.7293,which is higher than the NPP-VIIRS nighttime light data extraction result.

关 键 词：夜间灯光 珞珈一号 NPP-VIIRS 城市夜间灯光指数 漓江流域 

分 类 号：P208[天文地球—地图制图学与地理信息工程]