植被覆蓋度計算與分級

植被覆蓋度計算與分級―、植被覆蓋度計算1、數(shù)據(jù)處理打開tm3、tm4地表反射率影像◎#1BandMath((0.00336*b1-0.04143)...◎打開tm3、tm4地表反射率影像◎#1BandMath((0.00336*b1-0.04143)...◎#2BandMath((0.00470*b1-0.01979)...JarWindoFileOverlayEnhanceToolsWindow?|fl◎#1Zoom...-FileOverlayEnhanceToolsWindow二#1Scroll(0.08132)-2、計算NDVI(歸一化植被指數(shù))BasicTools^BandMath—輸入(b4-b3)/(b4+b3)0k—按B3選擇下面的tm3地表反射率、按B4選擇下面的tm4地表反射率—Choose—2000_NDVI_gongshi—打開—0k◎ BandMathExp：?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)B4-BandMathC(0.00470*bl-0.01979)/[1+0.04589*(0.00470*AvailableBandsListB^ndruth((0.00470*bl-0.01979)/[1W.04569*CO.(70如4B^ndruth((0.00470*bl-0.01979)/[1W.04569*CO.SflUpInfoE0如3」也表反射率??口B^ndMath((0.00336*bl"0.04143)/[1W.07179*(0.SflUpInfoHapVariabletoInputFileSpatialSubsetFullSceneOutputRQ￡*ultto:FileC'M^oryEnterOutputFilenaineChooseOCompress0K QueueCancelnI口口◎#1Scroll(0.08132)3、計算FVC（植被覆蓋度）nI口口◎#1Scroll(0.08132)3、計算FVC（植被覆蓋度）③#1BandMath[(b4-b3}/(b4+b3)):200..FVC=[(NDVI-NDVIS)/(NDV卜NDVI)]S V SV,S分別是植被和裸土的NDVI值，由于缺乏詳細(xì)的區(qū)域植被和土壤光譜圖數(shù)據(jù)，取值NDVIV=0.70,NDVI s=0.05,FVC=[(bl-0.05)/(0.7-0.05)]*[(bl-0.05)/(0.7-0.05)](此處bl指NDVI影像，F(xiàn)VC衡量植被生長的茂盛程度，取值0—1。)BasicTooMandMath—輸入[(b1-0.05)/(0.7-0.05)]*[(b1—0.05)/(9.0-0.0按]1選擇2000_NDVI_gongshi—Choose—2000_FVC_jisuan—打開—OkFileCh/已rlayEnhanceToolsWindowQf VariablestoBandsPairings口口StatisticsResults:2000_FVC_jisuanSelectFlottCla：=□：■FlotFileOptionsSelectSta13513091639613645000A13560479596137400001362335679613807000136792351961385800013734613096138960001370999329613928000130453S2096139560001390076169613972000139561499613931000140115279613938000140669039613991000141222019613992000V<1>4、處理FVC中DN值大于1的像元BasicToo?BandMath—輸入(bllt0)*0+(b1gt1)*1+(b1le1andblge0)Ok—按Bl選擇2000_FVC_jisuan—Choose—2000_FVC_chuli一打開—OkArnn@#1Scroll(0.08132)SffiUa@#1ZoomFileOverlayEnhaneToolsWindowArnn@#1Scroll(0.08132)SffiUa@#1ZoomFileOverlayEnhaneToolsWindowlowHelpz口口③StatisticsResults:2000_FVCchuliFileOptionsSelectFlottClearPlotMin/Max/Mean:2DOOFVCchuli0.3-0.4-0.2->00.51.0

BandNumber1.52.SelectStatt956063657960734416769560636579607344167696470609606274235S97254969764712777993039213S3990431416423983235207869921571725499607819427000000673000oooooooooool8740644 0.0087823208782320802467880246S480524638066302808272589035118920765894019296139923040847170040402112120000000000075、建立掩膜進(jìn)行處理打開黃石市邊界矢量數(shù)據(jù)；Vector—OpenVectorFile—選圖(黃石市邊界范圍.evf)f打開(3)以黃石市邊界矢量數(shù)據(jù)建立掩膜;BasicTools—Masking—BulidMask—Display#1—Options—ImportEVFS—選圖(lll)—Ok—Choose—命名(2000_FVC_chuli_yanmo)—打開—Apply(4)應(yīng)用掩膜;BasicTools—MaskingfApplyMaskf2000_FVC_chulifSelectMaskBangf2000_FVC_chuli_yanmofOkfOkfChoosef命名(2000_FVC_chuli_again)f打開—Ok

二、植被覆蓋度分級1、 打開數(shù)據(jù)：2000_FVC_chuli_again、2000_FVC_chuli_yanmo2、 分級(1)制作分級圖BasicTools^BandMath^輸入公式(blge0andblle0.1andb2eq1)*1+(b1gt0.1andb1le0.3)*2+(b1gt0.3andb1le0.5)*3+(b1gt0.5andb1le0.7)*4+(b1gt0.7andb1l1)*5+(b2eq0)*0-0k—按B1選擇2000_FVC_chuli_agan、B2選擇□I…EOOZL5□I卸sg)一O」U5L社a>P.E弓E-OOHMULJELILJIJJA?m-ll□I…Pud-CHSP亡呂禺Lq)r冷乏pu留紅0>輩^(qū)■X1■蘭fmte丄「ue4——HnqoolAdolooz只如efesooqofOInueA——=nqoolAHoloozn.tsMin.10Msk Mean5 2.094263Stdev2.1738961Scene(9,613,992points)SelectStattooooc c7o434oA45567on.tsMin.10Msk Mean5 2.094263Stdev2.1738961Scene(9,613,992points)SelectStattooooc c7o434oA45567oDN012345Npts453979132376838550680904011471042403733Total453979148685595254065606310572102099613992Percent47.22073.41974.00988.415211.931625.0030Fct22076403650206549970③StatisticsResults:2000_FVC_chuIi_fenjiSelectPlottClearFlotFileOptionsMin/Max/Mean:20DCi—FVCjchulifenji5斗—廿$一—>210-+一>00.5 1.0 1.5 2』BandNumber(2)分級①一等級：BasicToolsfBandMathf輸入公式(b2eql)*bl+(b2nel)*3—0k— 按Bl選擇2000_FVC_chuli_agan、B2選擇2000_FVC_chuli_fenjfChoosef命名為2000_FVC_chuli_again_1dengjif打開—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FileOverlayEnhanceToolsWindow◎#1Scroll(0.08132)-0CursorLocationJVa.?-口◎#1BandMath((b2eq1)*b1+(b2ne1)*...一FileOverlayEnhanceToolsWindow◎#1Scroll(0.08132)-FileOptionsDisp#1(33034525)Scrn：R:255G:255B:255Projection：UTM,Zone50North.Map:320325.O0E?3326595.00NMetersnranLL:30?z26.16%115??10.20rfEData：3.000000nranFileOptionsSelectFlottSelectFlottCle：=ltFlotMin/Mox/Mean:20DCi—FVC_jchuli^again_1dengjiL i * i i i l * i * 「 * *2.5P2.0PEOP0.5P1.0

BandNumber1.52.1.0

BandNumber1.52.Band10.0000003.0000002.090419HistcimramDNNptsTotalBand10.000000140100140100Bin=O.011760..011765471621953500..023530279042232540..03529414S732331270..047059152272533540..058324131482715020..070583216602931620..082353244223175840..094110111043207600..1050030323760SelectSta64_y_y558251005421112210r 61000000000p②相同方法計算2、3、4②相同方法計算2、3、4、5等級公式分別為：(b22等級：3等級4等級5等級eq2)*bl+(b2(b2eq3)*b1+(b2(b2eq4)*b1+(b2(b2eq5)*b1+(b2ne2)*7nenene*7*7*7結(jié)果圖:2等級FileOverlayEnhanceToolsWindow?#1Scroll(0.08132)-nHffinA/indowHe◎?#1Scroll(0.08132)-nHffinA/indowHe◎#1Zoom...-口FileOptionsMin/Mox/Mean:2CiDCi_FVC_jchuli^again_2dengjij I ? "? I I ? I ] ? I ? J ? ?r i ■SelectFlott CleMin/Mox/Mean:2CiDCi_FVC_jchuli^again_2dengjij I ? "? I I ? I ] ? I ? J ? ?r i ■~r+~r+6斗2>0 0.5 1.0 1.5 2』BandNumberSelectStaBasicStatsBand1Min0.100069Mas7.000000Mean6.727407S1.33AHistci^raimDNNptsTotalPerceBand10.10006952741527410.54Bin=0.027050.127127502101029510.520.154136469251490760.400.131244465131963090.400.208303430632444520.490.235361539352983870.560.262420610153594020.630.2S947S261043055060.270.31653703055060.00V<1>3等級
Scroll(0.08132)-nxadarWindc
Zoom…-FileOptionsSelectFlottMin8二/Max/Mean:20D0_Min8二I ? "? I ? ? ? l「 I * I J * * *4k2k0.51.0

BandNumber1.52.0.51.0

BandNumber1.52.SelectStattBand10.3004167.0000006.4455151.02AHistogramDNNptsTotalPerceBand1030041674S9674896077Bin=0.02627032660903221150117006035296195161253278098037923411033S371616123040550799567471103103043173012899760013013404530531306747308541350484326781863090400810510599000904000005363720009040000V<1>4等級:◎#1Scroll(0.08132)◎#1Zoom..."汽w?窪瘵族W.；n；???「節(jié)；聘f .亠?：:i??：，:，?痔禺K 'owHFfil:FileOptionsSelectFlott Cle：=□：■PlotSelectStattBand10.5005057.0000006.2367632.07AHistogramDNNptsTotalPerceBand10500505133981133901139Bin=0.0254S052599314113927512014605514011377754128951430576969146603559498152060245715271571221315806279461473193600321530653434150427101045915606739221366451147104142070441001147104000072939901147104000V<1>5等級◎#1Zoom...#1Scroll