植被覆盖度计算与分级

1、一员7上,;J9#1SctoII(0.081329-"2由mlMath£(D.0047D*b1-O.Ol979).dbFileOverlayEnhunistTaoliWindow#1Zoom.-#2Stroli(0.08132)-n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。#1BandM.h(O.OOS6*b1FileOverlayEthane?Tools-Window2、计算NDVI(归一化植被指数)BasicToolsfBandMath一输入(b4-b3)/(b4+b3)一Ok一按B3选择下面的tm3地表反射率、按B4选择下面的

2、tm4地表反射率一Choose-2000_NDVI_gongshi一打开一Ok。BandMath0VariablestoBandsPairingsExp：(b4-b3)/0>4+b3)Variablesusedinexpression：B3-BandMath(0.00336*bl-0.04143)/1+0.07179*(0.00336*B4-BandMath(0.00470*bl-0.01979”1+0.04569*(0.00470*BandMath(0.00470*bl-0.01979)/1+0.04569*(0AvailableBandsList目E54戈表反射率由.盖MapInfo

3、BandMath(0.00336*bl-0.04143)/1+0.07179*(0.由童MapInfoMapVariabletoInputFileSpatialSubsetFullSceneOutputResulttoFileMemoryEnterOutputFilenameChoose|CompressCKQueueCancelBandMath«b4-b3)/(b4b3):2OO.(5#1Zoom学#1Scrolt(0.08132)SffiD3取值NDVIFVC（植被覆盖度）V,S分别是植被和裸土的NDVI_2FVC=(NDVI-NDVIs)/(NDVIv-NDVIs)V=0.70

4、,NDVIs=0.05,FVC=(b1-0.05)/(0.7-0.05)*(b1-0.05)/(0.7-0.05)此处b1指NDVI影像，FVC衡量植被生长的茂盛程度，取值01。)BasicToolsfBandMath一输入(b1-0.05)/(0.7-0.05)*(b1-0.05)/(0.7-0.05)一Ok一按B1选择2000_NDVI_gongshiChoose-2000_FVC_jisuan一打开一OkVariablestoBandsPairingsExp：(bl-0.05)/(0.7-0.05)*(bl-0.05)/(0.7-0.05)Variablesusedinexpressio

5、n：Bl-BandMath(bLO.05)/9.7-0.05)*(bl-0.05"Q7-0.AvailableBandsListSpatialSubsetFullSceneOutputResulttoFileMemoryEntarOutputFilenameChoose|CompressQ#1Scroll(0.08132)一口0StatisticsResults:2000_FVCJisuanFileOptionsFSelectPlotIIClearPlotMin/Max/Meon:2000_FVC_jisuon1.4"十"1T11.2-述:Ot8-亘：二:十：0.

6、4-+-0.275DQ651©1.52、BandNumber13513091.356B471.3623851.36792313734611.3799991.3945381.39007613956141.4011S21.406690141222896136459613740961380796138589613B36961392B9613956961m97296139813&139S896139919613992SelectStaroo0,000ooo3571828697316965-3321oooooon-ooooooooooooooo4、处理FVC中DN值大于1的像元Ok一按

7、BasicToolsBandMath一输入(b1It0)*0+(b1gt1)*1+(b1le1andblge0)*b1B1选择2000_FVC_jisuanChoosef2000_FVC_chuli一打开一Ok0#1BandMath(b1ltO)*O+(b1gt1)*1+(.-xFileOverlayEnhanceToolsWindowiowHelpStatisticsResults:2000_FVCchuliFileOptionsSelectStarSelectFlot，ClearPlot0.956g63&57974064409607844167637S2320口,964706087

8、323200.968627423588824670口.57254968824684口,976471NT?7'88524630.9903921383908663020.9343141642398E2725口.988235207868903511,992157172S489207650.99607819427894019210000006738003613952000a3040847170040402112120000000000075、建立掩膜进行处理打开黄石市边界矢量数据；VectorOpenVectorFile选图(黄石市边界范围.evf)打开(3)以黄石市边界矢量数据建立掩膜；Ba

9、sicToolsMaskingBulidMaskDisplay#1-Options-ImportEVFS选图(111)-OCCh00sg命名(2000_FVC_chuli_yanmo)打开ApplyFileOverlayEnhanceToolsWindow#2MaskBand:2000_FVC_chulLyanmo一口ableBanditions(4)应用掩膜;BasicToolsMaskingApplyMask2000_FVC_chuli-SelectMaskBang2000_FVC_chuli_yanmgOCOCChoose命名。#1Scroll(0,08132)-口S#1CursorLo

10、cation/Va,°IFileOption?Eisp#1(3733,3711)Scrn：R.OG.0B:0Projidion：UTB,Zone50NorthMap：333045OOE,3351015.QOHMtttrsLL:如？6'45.64"比US?5J5115"E二、植被覆盖度分级1、打开数据：2000_FVC_chuli_again、2000_FVC_chuli_yanmo2、分级(1)制作分级图BasicToolsBandMath7输入公式(b1ge0andblle0.1andb2eq1)*1+(b1gt0.1andb1le0.3)*2+(b1g

11、t0.3andb1le0.5)*3+(b1gt0.5andb1le0.7)*4+(b1gt0.7andb1le1)*5+(b2eq0)*0一Ok一按B1选择2000_FVC_chuli_agan、B2选择2000_FVC_chuli_yanmoChoose一命名为2000_FVC_chuli_fenji一打开一OkFileOverlayEnhanceToolsWindc0f#1Scroll(0.08132)一口。#1Zoom-一口#1BandMath(blgeOandblleOJand.一n:?StatisticsResults:2000_FVC_chuILfenjiFileOptionsSe

12、lect.FlctClearPlot已qn:20Dg_FVC-jchijlinji+543210DQ651©1.52、qBandNumber1Scene(9,613,992points)atsMinMoleMeanStdev.10S2.0942632.173896DNNptsTotalPercentAccPct04539751453979147.220747.2207132876348685593.4197506403238550652E40654.009854.65021380904060631058.415263,06541411471C4721020911.9316749970

13、52403733961399225.00301000000V<>SelectSm(2)分级一等级：BasicToolsBandMath7输入公式(b2eq1)*b1+(b2ne1)*3一Ok一按B1选择2000_FVC_chuli_aganB2选择2000_FVC_chuli_fenjiChoose一命名为2000_FVC_chuli_again_1dengji打开一Ok0#1BandMath(b2eq1)*b1+(b2ne1)*.-FileOverlayEnhanceToolsWindowO#1Scroll(0.08132)-。CursorLocation/Va一口9FileOp

14、tionsFileOverlayEnhanceToolsWindow0#1BandMath(b2eq1)*b1+(b2ne1)*.-9#1Scroll(0.08132)-0CursorLocation/Va.一口0FileOptionsDisp#1(3309,4525)Scrn：R：255G:255B:255Projection：UTM,Zone50NorthMap：320325.00E,3326595.00NMetersLL:30726.16"此115?T0.20"EData：3.000000，StatisticsResults:2000_FVC_chuIi_agdin.

15、一口FileOptionsSelect.FlctClearPlot11话/11口)</11巳口门:20(20-3心_上1159口1#勺口r*'弋1''"1"f"r-n3Q2,5P2Q1$repO.CP.DQ651.0BandNumber2、Band10.0000003.0000002899419HistogramDNNptsTotalBand10.oooooo148188149198Bin=O011760.0117S547162135350口,023530279042232540.035294148732381270.04705915

16、227253354口.05882418143271502070588216602931620.,08235324422317S040.09411811184323763口,105B830328768SelectStatS4995E8251Oc5421112210rLr-bErhEl0000000-00p相同方法计算2、3、4、5等级公式分别为：2等级：(b2eq2)*b1+(b2ne2)*73等级：(b2eq3)*b1+(b2ne3)*74等级：(b2eq4)*b1+(b2ne4)*75等级：(b2eq5)*b1+(b2ne5)*7结果图：2等级FileOverlayEnhanceToolsW

17、indowiQ#1Scroll(0.08132)-X。#1Zoom.一门田口FileOptionsSelect.PlctTClearPlotMin/Max/Mean:20M_FVC_jchulliagain_2dergji8r-*111-f-1i6kDQ651©BandNumberSelectSdBasicStatsBand1Min0100069Max7.000000Mean6.727487S133HistogramBand1Bin=0.02705DH0.1000&90.1271270.1541060.1312440.2083030.23536102624200.239478

18、0.316537Npts52741502104692546513480635393561015261040Tctal527411口29511498761963B92444522983S73594023S55O6385506Perce42989637055444562000,00000003等级adarWinchFileOverlayEnhanceToolsWindow0#1Zoom.一#1Scroll(0.08132)-xHtHLJFileOptionsSelect.FlctClearPlotMn/Mcic/M*en:20po_FVC_jch11口qajn_3derigjifT>11Ia

19、-DQ651.0BandNumberBand103004167.000000&.445515HistogramDNNptsTotalBand103004167409674296Bin=O0262703266S98322.1153117口，352961951612532780.3792341183383716160.405E07995674711B30.4317801289976001800.4580531306747308540.464326781B68090400.51059908口904。0.536B72080040<SelectSd0011110-01.yj68334510

20、08920338004等级:xdowHelpX。#1BandMath(b2eq4)*b1+(b2ne4)*.FileOverlayEnhanceToolsWindow9#1Scroll(0.08132)一口£：斓z斐必；.%处置£丁：,逆浮高海Kyg.日出口F洋"彩潍晨蕤釉；FileOptionsSelect.PlctTClearPlotMir>/Mcix/Menri：20CO_FVC_jchjjigDin_4derigji8642DQ651©1.52、qBandNumberSelectSdBand105005057.00000062367632.

21、07aHistogramBand1Bin=0.02543BN050050505259930.5514810,5769690.6024570.6279460.6534340.6789220.7044100.729899Npts13390114113913777514660315271514781915042713664500Total1339012751204128955594987122138E00321010459114710411471041147104Feres1.391.461.431.5215B1.531.561.420.000.005等级0#1BandMath(b2eq5)*b1+(b2ne5)*.一口FileOverlayEnhanceToolsWindowx。#1Zoom.一口#1Scroll(0.08132)一0FileOptionsMiri/Mdx/Meori：2