基于ENVI植被动态变化分析

201210225、。、、、。20601972。、、、、。3。、。。。。。、。、、。。、、、、、、。、、、、、。、、“”。、、。30AVIRIS。、、。5。1674-9146（2012）10－0061－07ENVI、、。、、、、、RS、、NDVI、、。10.3969/j.issn.1674-9146.2012.10.0612012－08－22；2012－09－23。AppliedTechnology-061-SCI-TECHINNOVATION&PRODUCTIVITYNo．10Oct.2012，TotalNo．225、、、、、、LST、、、、、。。20。、AVHRR。AVHRR。TuckerNOAA-AVHRR。。1983—1992AVHRR-NDVI1985—1990AVHRR-NDVI。EN－VI。1.1。1。111°21′～111°56′36°56′～37°18′。46km26.55km948km2442004。。731～1716m。6、7、5、、、、、、、、、、、、、、、、、。。。1.2。147.64km215.61%。442.26km246.76%。182.73km219.32%。173.17km218.31%。1.3。。1.4“”。、50AppliedTechnology-062-20121022535。2.1ENVIETM+。1。2。3、、。4。2.21。2、。3。4。5。2.3、ENVINDVI2。2.4RSENVI。ENVI———ENVITheEnvironmentforVisualizingImagesExelisVisualInformationSolutions/、、、、、、、、、、GIS、DEM、、。3.1。3.2。3.2.1。1ENVIFile→OpenImageFile1999hecheng.hdr。2543LoadRGBView。3File→OpenVectorFileLoadVectorWin－dow#1File→ExportActiveLayertoROIs…SelectInputFile1999hechengOK。41999hechengOverlay→Regionofinterest…ROIxiaoy－ishiFlie→SubestDataViaROIsInputFileOKROIsOK。3。AppliedTechnology-063-SCI-TECHINNOVATION&PRODUCTIVITYNo．10Oct.2012，TotalNo．2253.3NDVI3.3.1。20NDVINormalizedDifferenceVegetationIndexRVIRatioVegetationIndexDVIDifferenceVegetationIndexSAVISoilAdjustedVegetationIndexMSAVIModifiedSoilAdjustedVegetationIndex。。。。NDVI。NDVI、。-1≤NDVI≤1、、0NIRRNDVINIRR。RVINDVIRVINDVINDVINDVI、、、。NDVI=NIR-RedNIR+Red1NIRRed。NDVI。3.3.2NDVIENVI。1Transforms→NDVI。2InputFileOK。3NDVICalculationParametersOK4。3.4。。。。3.4.1NDVI。RR=fRv+1-fRs2RvRs、ff1=R-RsRv-Rs3f2=NDVI-NDVIsNDVIv-NDVIs4NDVINDVIvNDVIs。AppliedTechnology-064-201210225f3=NDVI-NDVIminNDVImax-NDVImin5NDVINDVImaxNDVIminNDVI、。ND－VI。NDVINDVINDVImaxNDVImin。NDVINDVImaxNDVImin。NDVI550～15＜0＞1＜0＞101[8]。3.4.21NDVI。2ENVI。-112。3BasictoolsStatistics→ComputeStatis－tics。NDVImaxNDVIminNDVImin0NDVImax。4ENVIBasicTools→Bandmath。b1ltNDVImin*0+b1gtNDVImaxandb1le1*1+b1gt1andb1le2*2+b1geNDVIminandb1leNDVImax*b1-NDVImin/NDVImax-NDVImin6NDVImaxNDVINDVIminNDVI。AddToListOK。1999ndviOK5。3.53.5.130～0.250.25～0.50.5～1。。ENVI。1Classification→DecisionTree→BuildnewDecisionTree。6。2File→SaveTree。3Option→Execute…。3.5.2ENVI。AppliedTechnology-065-SCI-TECHINNOVATION&PRODUCTIVITYNo．10Oct.2012，TotalNo．225Classification→PostClassification→ClassStatisticsOKgaoduzhongdudiduOKm278。ENVI199910.22%100.619km28.02%78.979km281.75%804.727km220084.46%43.875km222.67%223.112km272.90%717.537km2。2007。4.119992008、、。19993804.727km278.979km2100.619km220083717.537km2223.112km243.875km2。2008199987.19km2144.133km256.744km2。4.24.2.1781999200820084.39%。2000、。、。。4.2.2。。4.2.3。、。。19992008。AppliedTechnology-066-201210225DiscussiononConstructionTechnologyandMethodsofTransformingCountyPowerSystemZhaoQiangMianyangAnCountyElectricityBureau,SichuanElectricPowerCompany,Mianyang622651ChinaAbstract:TakingSichuanMianyangAnCountypowersystemforanexample,aimingatexistingproblemsoftypeselectionwithoutanchorpole,selectingwirediameterandtransformofringnetworkofconstructiontechnologyintransformingdistri-butionline,theauthorputforwardsolutionscombiningpractice.Keywords:countypowersystem;transform;construction。——————————AnalysisonVegetationDynamicsBasedonENVIChenFengTaiyuanDaqianPastoralTreatmentEngineeringConsultationCo.,Ltd,Taiyuan030024ChinaAbstract:Vegetationcoveragereflectsanimportantindicatorofthevegetationcoverstatusandmonitoringtheecologicalen-vironmentwhichisthebasisofthedatausedtostudyregionalorglobalscalehydrological,meteorological,ecologicalandotherfields,hasbeenwidelyusedinallkindsoftheoriesandmodels.Inthispaper,theauthorbrieflyintroducedthechiefofthestudyarea,geological,climateandenergyoverview,anddiscussedtheresearchcontent,researchprograms,technicalroute,RSprocessingplatform,adetaileddiscussionofthedatacollection,datapreprocessing,extractvegetationindex(ND-VI),vegetationcoveragecalculations,thevegetationcoveragegradingandtheareaofstatisticsandresearchmethods.Finally,theauthoranalyzedthestatisticalresultsandchangesinvegetationcover,anddiscussedthevegetationcoverageinXiaoyiCityandputforwardproposeddevelopment.Keywords:remotesensingmonitoring;analysisofvegetationdynamics;supervisedclassificationAppliedTechnology-067-