植被覆盖度计算与分级.docx

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1、植被覆盖度计算与分级一、植被覆盖度计算1、数据处理打开tm3、tm4地表反射率影像Q#9ScrollfO.Ofll32)一Ht12、计算NDVI（归一化植被指数）BasicTools—BandMath一输入（b4-b3）/（b4+b3）一OW按B3选择下面的tm3地表反射率、按B4选择下面的tm4地表反射率一Choosef2000_NDVI_gongshif打开fOk◎BandMathOKCancelHtlp◎VariablestoBandsPairingsExp：Cb4-b3VCb4tb3)Variablesusedinexpression

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3、B3-BandHath(Q0033阶bl-0.04143”[1+0.07178Q.0033例B4-BandMath((G.00470座bl・0.01979)/[140.04569*(0.00470*BandHath((0.00470*bl-0.01979)/[1+0.04569*(0.kvailaLleBandsList学国tm4j也裘反射率由—侬MapInfo白0t2」也表反肘率B皿dMathC(0.00336*bl-0.04143)/[1+0.0T179*(0.定®MapInfoM«pVari*11-toInputFileSpatia

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5、C衡量植被生长的茂盛程度，取值0—1。)一Ok一BasicTools—BandMath一输入[(b1-0.05)/(0.7-0.05)]*[(b1-0.05)/(0.7-0.05)]按B1选择2000_NDVI_gongshifChoos12000_FVC_jisuan一打开一Ok0BandMathXFreviousB^nd.MathExpressions：[(bl-O.05)/Q7-。05)]*[(bl-005)/S.10.05)](!>4-b3)/(b4+b3)Save

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8、.05)/(0.7-0.05)]*[(bl-0.05)/(0.7-0,05)]Add.toLixtOKCancel[阳回]0BandMathX0BandMathX0#1BandMath([(b1-0.05)/(0.7-0.05)]*...一XFileOverlayEnhanceToolsWindownCursorLocation/Va…7yFileOptionsDisp#1(2181,47^5)Scrn：R:234G234B：234Projection：BTM/Zone50NorthNap：286485.OOE,3318495.OONMete

9、rsLL!29?，43.61"N,114?7T3.OS"Data：1.0451920#1BandMath([(b1-0.05)/(0.7-0.05)]*...一X0#1BandMath([(b1-0.05)/(0.7-0.05)]*...一X#1Scroll(0.08132)一0◎#1Zoom…一n0#1BandMath([(b1-0.05)/(0.7-0.05)]*...一X③StatisticsResults:2000_FVCjisuanFileOptionsSelectPlfltv]

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11、klin/Mcx/Mean:200

12、0_F7CL_jisuan14p~'F'1-r'Fr-■nF1'-Z1^2--eiOS-+Ta,e--二十二0.4〉I--I--52-三■_

13、_~D.51Q1.02.BandNumber1.3513091639G136J5135634796137401.3&23SS96138071.36792396136581.37316136136361.379999961392g1.3日45389613956133007696139721395SL49613931110115296139361,40669。961399114122289613992oon

14、ooooooo■4■ooo4、处理FVC中DN值大于1的像元BasicTools—BandMath一输入(b1It0)*0+(b1gt1)*1+(b1le1andb