植被覆盖度计算与分级..

1、植被覆盖度计算与分级一、植被覆盖度计算1、数据处理Q#2BandMath(0.00470*b1-0.01979).JarWindoFileOverlayEnhanceToolsWindowFileOverlayEnhanceToolsWindow打开tm3、tm4地表反射率影像#1BandMath(0.00336*b1-0.04143).»|fl2、计算NDVI(归一化植被指数)BasicToolsBandMath输入(b4-b3)/(b4+b3)Ok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Choose2000_NDVI_gongshi打开OkBandMat

2、hExp：©4-b3)/(b4+b3)Variablesusedin.expression：B4-BandMathC(0.00470*bl-0.01979)/1+0.04589*(0.00470*B3-Band血thC(0.00336*bl-0.04143)/1+0.07179*(0.00336*AvailableBandsListBndruth(0.00470*bl-0.01979)/1W.04569*CO.(70如4也表反射率:_SflUpInfoE0如3也表反射率口BndMath(0.00336*bl"0.04143)/1W.07179*(0.SflUpInfoHap

3、VariabletoInputFileSpatialSubsetFullSceneOutputRQ£*ultto:FileC'MoryEnterOutputFilenaineChooseOCompress0KQueueCancelnI口口#1Scroll(0.08132)3、计算FVC（植被覆盖度）#1BandMath(b4-b3/(b4+b3):200.FVC=(NDVI-NDVIS)/(NDVIy-NDVIs)2V,S分别是植被和裸土的NDVI值，由于缺乏详细的区域植被和土壤光谱图数据，取值NDVIV=0.70,NDVIs=0.05,FVC=(bl-0.05)/(0.7-

4、0.05)*(bl-0.05)/(0.7-0.05)(此处bl指NDVI影像，FVC衡量植被生长的茂盛程度，取值01。)BasicToolsBandMath输入(b1-0.05)/(0.7-0.05)*(b1-0.05)/(0.7-0.05)OkT按B1选择2000_NDVI_gongshiChoose2000_FVC_jisuan打开OkFile3已rlayEnhanceToolsWindowBandMathQfVariablestoBandsPairings口StatisticsResults:2000_FVC_jisuanSelectFlottCla：=：FlotFileOptionsS

5、electSta13513091639613645000A13560479596137400001362335679613807000136792351961385800013734613096138960001370999329613928000130453S2096139560001390076169613972000139561499613931000140115279613938000140669039613991000141222019613992000V<1>4、处理FVC中DN值大于1的像元BasicToo®BandMath输入(b1It0)*0+(b1gt

6、1)*1+(b1le1andblge0)*b1按B1选择2000_FVCisuanChooseT2000_FVC_chuliT打开Ok#1BandMath«b1ltO)*O+(b1gtiri+(.n口Arnn#1Scroll(0.08132)SffiUa#1ZoomFileOverlayEnhaneToolsWindowlowHelpz口StatisticsResults:2000_FVCchuliFileOptionsSelectFlottClearPlotMin/Max/Mean:2DOOFVCchuli0.3-0.4-0.2->00.51.0BandNumber1.52.

7、SelectStatt9560636579607344167696470609606274235S97254969764712777993039213S3990431416423983235207869921571725499607819427000000673000oooooooooool87406440.0087823208782320802467880246S480524638066302808272589035118920765894019296139923040847170040402112120000000000075、建立掩膜进行处理打开黄石市边界矢量数据；VectorOpenV

8、ectorFile选图（黄石市边界范围.evf）f打开（3）以黄石市边界矢量数据建立掩膜；BasicToolsMaskingBulidMaskDisplay#1OptionsImportEVFS选图(111)OkChoose命名(2000_FVC_chuli_yanmo)打开一Apply(4)应用掩膜;BasicToolsMaskingApplyMask2000_FVC_chulifSelectMaskBang2000_FVC_chuli_yanmoOkOkChoose命名(2000_FVC_chuli_again)打开Ok二、植被覆盖度分级1、打开数据：2000_FVC_chuli_agai

9、n、2000_FVC_chuli_yanmo2、分级BasicToolsBandMath输入公式（1）制作分级图(blge0andblle0.1andb2eql)*l+(blgt0.1andblle0.3)*2+(blgt0.3andblle0.5)*3+(blgt0.5andblle0.7)*4+(blgt0.7andbllel)*5+(b2eq0)*0Ok按B1选择2000_FVC_chuli_agan、B2选择2000_FVC_chuli_yanmoTChooseT命名为2OOO_FVC_chuli_fenji打开OkQ#1BandMath(blgeOandb!leO.land.-Fil

10、eOverlayEnhanu已ToolsWindow令#1BandMath(b2eq1)*b1+(b2ne1)*.XXn.tsMin.10MskMean52.094263Stdev2.1738961Scene(9,613,992points)SelectStatt(2)分级oooocc7o434oA45567oDN012345Npts453979132376838550680904011471042403733Total453979148685595254065606310572102099613992Percent47.22073.41974.00988.415211.931625.0030

11、Fct22076403650206549970StatisticsResults:2000_FVC_chuIi_fenjiSelectPlottClearFlotFileOptionsMin/Max/Mean:20DCiFVCjchulifenji511111111111111斗+j廿$一>210-+一1II11I11I1I1III>00.51.01.52BandNumber一等级：BasicToolsBandMath输入公式(b2eq1)*b1+(b2ne1)*3Ok按B1选择2000_FVC_chuli_agan、B2选择2000_FVC_chuli_fenjiChoose命名

12、为2000_FVC_chuli_again_1dengji打开OkyFileOverlayEnhanceToolsWindowScroll(0.08132)-口CursorLocation/Va.FileOptionsDisp#1(3117,4337)Scrn：R:3G：3B:3Projection：UTM,Zone50NorthMap：314565.OOE?3332235.00NffletersEL:30?'26.19"N?115?'31.65“EData：0.001099#1BandMath(b2eq1)*b1+(b2ne1)*.一FileOverlayEnhan

13、ceToolsWindow#1Scroll(0.08132)-0CursorLocationJVa.-口FileOptionsDisp#1(33034525)Scrn：R:255G:255B:255Projection：UTM,Zone50North.Map:320325.O0E?3326595.00NMetersnranLL:30?z26.16%115?10.20rfEData：3.000000StatisticsResults:2000_FVC_chuIi_again.nFileOptionsSelectFlottCle：=ltFlotMin/Mox/Mean:20DCiFVC_jchul

14、iagain_1dengjiLi*iiil*i*2.5P2.0PEOP0.5P1.0BandNumber1.52.Band10.0000003.0000002.090419HistcimramDNNptsTotalBand10.000000140100140100Bin=O.011760.011765471621953500.023530279042232540.03529414S732331270.047059152272533540.058324131482715020.070583216602931620.082353244223175840.094110111043207600.105

15、0030323760SelectSta64_y_y558251005421112210r61000000000p相同方法计算2、3、4、5等级公式分别为：(b2eq2)*bl+(b2ne2)*72等级：'3 等级：(b2eq3)*b1+(b2ne3)*74 等级：(b2eq4)*b1+(b2ne4)*75 等级：(b2eq5)*b1+(b2ne5)*7结果图:2等级Qf#1BandMath(b2eq2)*b1+(b2ne2)A.-口IFileOverlayEnhanceToolsWindow®#1Scroll(0.08132)-nHffinA/indowHe#1Zoom.-口

16、StatisticsResults:2000_FVC_chuIi_again.-nFileOptionsMin/Mox/Mean:2CiDCi_FVC_jchuliagain_2dengjijI"IIIIJriSelectFlottCle：=ltFlotr+86斗2>00.51.01.52BandNumberSelectStaBasicStatsBand1Min0.100069Mas7.000000Mean6.727407S1.33AHistciraimDNNptsTotalPerceBand10.10006952741527410.54Bin=0.027050.1271275

17、02101029510.520.154136469251490760.400.131244465131963090.400.208303430632444520.490.235361539352983870.560.262420610153594020.630.2S947S261043055060.270.31653703055060.00V<1>3等级#1BandMath(B2eq3)*b1+(b2ne3)*.-FileOverlayEnhanceToolsWindownx&#1Scroll(0.08132)-nxadarWindc&#1Zoom-Statisti

18、csResults:2000_FVC_chuIi_again.-口FileOptionsSelectFlottMin8二/Max/Mean:20D0_FVC_jchuliogain_3dengjiI"IlI*IJ*4k2k0.51.0BandNumber1.52.SelectStattBand10.3004167.0000006.4455151.02AHistogramDNNptsTotalPerceBand1030041674S9674896077Bin=0.02627032660903221150117006035296195161253278098037923411033S37

19、1616123040550799567471103103043173012899760013013404530531306747308541350484326781863090400810510599000904000005363720009040000V<1>4等级:#1BandMath(b2eq4)*b1+(b2ne4)*.FileOverlayEnhaneToolsWindownx#1Scroll(0.08132)#1Zoom."汽w窪瘵族W.；n；节；聘f.亠：:i：，:，痔禺K'HFfil:owStatisticsResults:2000_FVC_chu

20、Ii_again.-口FileOptionsSelectFlottCle：=：PlotSelectStattBand10.5005057.0000006.2367632.07AHistogramDNNptsTotalPerceBand10500505133981133901139Bin=0.0254S052599314113927512014605514011377754128951430576969146603559498152060245715271571221315806279461473193600321530653434150427101045915606739221366451147104142070441001147104000072939901147104000V<1>5等级#1Zoom.#1Scroll(0.08132)xFileOptionsSelectFlottCle：=：PlotMin/Max/M