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、数据处理打开tm3、tm4地表反射率影像9#2EandMatfi(0.00470*b1-0.01979).%!1ir0#2ScrollfO.Oai32)9#1Scroll(ajOS132)詡跖BandMath(O.M3S5*b1-0.D4143).Fla-OverluyEntiancffTools训曲时#2Zoom.-A-82、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OkEx

2、p：Cb4-b3)/(b4H3)Variablesusedinexpression：B3-BandMath(0.00336*bl-0.04143)/l+0.07179*(0.00336Auvailal>leBandsListBandMath(0.00470*bl-0.01979)/1+0.04569*(0.54J也克直射笔:®-OMopInfo©(2皿乂簸射率BwdM&thC(0.00336*11-0.04143)/1+0.07179*(0.FilapInfoMapVariaLletoInputFileSpatialSubsetFullSceneOutputR

3、esultto(/FileMernwyEnterOutputFilenanieChoose|CompressOKQueueCaneelJtelpClear*r#1BandMath(b4-b3)/(b4+b3):200FileQverlayEnhanceTools.Window#1Scrol(0.081321-n#1Zoom.,.,-3、计算FVC（植被覆盖度）FVC=(NDVI-NDVIS)/(NDVIV-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=(b1-0.05)/(0.7-0.05)*(

4、b1-0.05)/(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Ok0BandMathxOKCancelVariablestoBandsPairings#1BandMath(bV0.05)/(0.7-0.05)*.FileOverlayEnhaneeToolsWindow#1ZoomBisp#1(2181,4795)Scrn：R:234G

5、:234B:234Projection*UTM?Zone50NorthMap：286485.00E?3318495.OOHMetersLL:29?8?43,Sr%114?7?13.OSEBata：1.045132#1Scroll(0.08132)-nFileOptionsCursorLocation/Va.-nXStatisticsResults:2000_FVC_jisiianFileOptionsSelectStit_y617_b3611.3513091.3568471.3623851.3679231.3734611.3789991.3845381.3900761.295G141.4011

6、521.4066901.4122289613645961374096138079613858961389696139289613956961397296129819613988961399196139924、处理FVC中DN值大于1的像元BasicToo®BandMath输入(b1It0)*0+(b1gt1)*1+(b1le1andblge0)*b1iOk按B1选择2000_FVCisuanChooseT2000_FVC_chuliT打开Ok*#1BandMath(b1ltO)*O+(b1gt1)*1+(.-口nFileOverlayEnhanceToolsWindowlowHelp

7、xScroll(0.08132)-口StatisticsResults:2000_FVCchuliFileQpti&ns0.0D.51.01.52BandNumberSel&ct095686365787406440.00A09607844167687823200.430964706087823200.00096S6274235S8S246780.440972549688246840.0009764712777988524630.2809803921383988663020.1409843141642388827250.1709882252078689025110.2109921

8、571725489207650.17099607S19427S9401920.201OOOOOO67380096139927.00V<>5、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）f打开（3）以黄石市边界矢量数据建立掩膜；BasicToolsMaskingBulidMaskDisplay#1OptionsImportEVFS选图（lll）OkChoose命名（2000_FVC_chuli_yanmo）打开一Apply#2MaskBaind:2OOC_FVCch111i_yanmocibleBand.口FileOp

9、tionsXitionsJO0_F¥E_ch.uli_yanmo；MapInfoJ00_mchuliIBandMath.(blltOjjM如IhfyJ00_FVTjisnaiiIBan!Math(Q.1-0?jMapIit£&JO0_HIIVZE_gongshiIBanlMath(B4-b3-RGBCelt-Ld:2000_FVC_ch-ulij匚ursorLocation/Va.Disp#2(29-47,6167)Scrn：R:255B:255Projectioii：UTMjZone50NorthMaj：309465.口他32:77335.00WMetersLL:

10、29?6J40.T6"N,U5?J56.26"EData：14）应用掩膜；BasicToolsMaskingApplyMaskf2000_FVC_chulifSelectMaskBang2000_FVC_chuli_yanmoOkOkChoose命名(2000_FVC_chuli_again)打开Oknn口CursorLocation/Va了#1#1Mask(BandMath(bllt0)*0+(b1g®#1Scrolf(0.08132)arWindowHelpFileOverlayEnhanceToolsWindowFileOptionsDisp#1(3733.

11、3T11)Scrn：R：0G：0B：0Frejection：ITTMZone50ITorthMap7333045.OOE,3351015.00NMetersLL:30?6J45.64,VN1115?5J51.15BYEData：0.000000BffiD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BasicToolsBandMath输入么式(blge0andblle0.1andb2eql)*l+(blgt0.1andb1le0.3)*2+(b1gt0.3andb1le0.5)*3+(b1gt0.5and

12、b1le0.7)*4+(b1gt0.7andb1lel)*5+(b2eq0)*0Ok按B1选择2000_FVC_chuli_agan、B2选择2000_FVC_chuli_yanmoChooseT命名为2OOO_FVC_chuli_fenji打开OkO#1BandMath(b1geOandblleO.land.-FileOverlayEnhanceToolsWindowStatisticsResults:2000_FVC_chuli_fenjiFileQpti&nsSel&ct1Scene(9.613.992口oints)A上3MinMaKMeanStdew152.094263

13、2.173896DNNptsTotalPerceritAccPct04539791453979147220747.2207132876848685593419750.6403238550G52540G5409854.G502380904060631058415263.65441147104721020911931674.997052403783961399225030100.V<>2）分级一等级：BasicToolsBandMath输入公式(b2eq1)*b1+(b2ne1)*3Ok按B1选择2000_FVC_chuli_agan、B2选择2000_FVC_chuli_fenjiC

14、hoose命名为2000_FVC_chuli_again_1dengji打开Ok#1BandMath(b2eq1)*b1+(b2ne1)*.FileOverlayEnhanceToolsWindow11CursorLocation/Va.一#1Scroll(0.08132)-nAFileOptionsDisp#1(3117,4337)Scrn：R:3G：3B:3Projection：UTM,Zone50Northfilap:314565.00E?3332235.00NMetersLL:30726.19“凡115?'31.65“EData：0.001099%IEFileOverlayEn

15、haneeToolsWindow9#1BandMath(b2eq1)*b14-(b2ne1)*.-3#1Scroll(0.08132)-nCursorLocation/Va.-口FileOptionsDisp#1(3309,4525)Scrn：R:255G:255B:255Projection：UTM?Zone50NorthMap：320325.00E?3326595.OONMetersLL:30?26.16115?1O.2O"EData：3.000000日田口StatisticsResults:2000_FV匚_chudigmiri-nXFileQpti&ns(b2eq2)

16、*b1+(b2ne2)*72等级：3 等级：(b2eq3)*b1+(b2ne3)*74 等级：(b2eq4)*b1+(b2ne4)*70.0D.51.01.52BandNumberSel&ctBand10oooooo3.OOOOOO2.8984190.53AHrst口DNNptsTotalPerceBand10OOOOOO14818S14S1S8Bm=0.0117600117654716219535000235302790422325400352941487323812700470591522725335400588241814827150200705882166029316200S2

17、3532442231758402500941181118432876801058830328768u-uuV<>相同方法计算2、3、4、5等级公式分别为：5等级：(b2eq5)*b1+(b2ne5)*7结果图2等级StatisticsResults:2000_FVC_chuli_again.nX#1BandMath(b2eq2)b1+(b2ne2)*.-#1Zoom.NindowHeFileOve-rlayEnhanceToolsWindow©#1Scroll(D.08132)-nFileOptionss1.33Min0.100069Mean6.727487BasicSt

18、atsBand1Max7.000000SelectStite4288_y637_u0554445520HistogramDNNptsTotalBand10.1000695274152741Brn=0.027050.127127502101029510.154186469251498760.181244465131963890.208303480G22444520.235361539352983870.262420610153594020.289478261043855060.31653703855063等级adarWindc#1BandMath(b2eq3)*b1+(b2ne3).-FileO

19、verlayEnhanceToolsWindow#1Zoom.-#1Scroll(0.08B2)-口xFileOptionsSelectStit7.0000006.4455151.82Hrstogr-amDNBand10.300416Bm=0.026270.3266890.3529610.3792340.4055070.4317800.4580530.4S43260.5105990.536872Band10.300416832211581170.951612532780.1183383716161.995674711831.1289976001801.1306747308541.7S1S680

20、90400.08090400.08090400.NptsTotalPerce74S96748960.7-68334510078Q-20238004等级：nxn#1BandMath(b2eq4)*b1+(b2ne4)*.FileOverlayEnhanceToolsWindew#1Zoom.-口7哄:朴Qt#1Scroll(0.08132)-口:脅-I.W恋Q殘:沆心&.BffiUStatisticsResults:2000_FV匚_chudigmiri-nXFileQpti&ns0.0D.51.01.52BandNumberSel&ctBand105005057.0000006.2367632.07AHrst口DNNptsTotalPerceBand105005051339811339S11.39Bm=0.0254805259931411392751201.4605514811377754128951.4305769691466035594981.5206024571527157122131.58062794G1478198G00221