基于DMSPOLS夜间灯光指数的浙江GDP空间化

基于DMSPOLS夜间灯光指数的浙江GDP空间化1. IntroductionIn recent years, the use of nighttime light data has become a

DMSPOLSGDP 基于夜间灯光指数的浙江空间化 1.Introduction Inrecentyears,theuseofnighttimelightdatahasbecomean importanttoolforstudyingthespatialdistributionofeconomic activities.TheDefenseMeteorologicalSatelliteProgram OperationalLinescanSystem(DMSPOLS)providesan unprecedentedsourceofnighttimelightdatathatcanbeusedto examineeconomicactivityatahighspatialresolution.One importantapplicationofDMSPOLSdataistoestimatethespatial distributionofGrossDomesticProduct(GDP)atasub-national level. ThisresearchfocusesonthespatialdistributionofGDPin ZhejiangProvince,China,basedonDMSPOLSdata.Zhejiangisa developedprovincelocatedintheeasternregionofChina,witha well-developedeconomyandavibrantprivatesector.Assuch,it providesaninterestingcasestudytoexaminetherelationship betweennighttimelightandeconomicactivity. 2.DataandMethodology 2.1Data TheDMSPOLSdatausedinthisstudyweredownloadedfrom theNationalOceanicandAtmosphericAdministration(NOAA) website.Thedatacovertheperiodfrom2012to2016,andwere processedintoannualaveragenighttimelightcompositesfor eachyearusingtheRasterpackageinR.Inthisstudy,weusedthe stablelightsproduct(version4)torepresentthestable componentofnighttimelightemittedfrombuilt-upareas. GDPdatawasobtainedfromtheZhejiangStatistical Yearbook,whichprovidesannualdataonGDPforeach administrativeregionintheprovince.Duetodataavailability,we usedGDPdatafortheyear2015intheanalysis. 2.2Methodology TheDMSPOLSdatawerefirstfilteredtoremovepixelswith lowsignal-to-noiseratioandthoselocatedinwaterbodies.Next, thedatawereconvertedintoacontinuousluminancevalueusing thecalibratedradiancevaluesprovidedinthedata.The