arcgis提取水系步驟

1、Arcgis提取水系的步驟0、DEM切割如果DEM太大，可以先進(jìn)行切割A(yù)加載DEM圖像，ArcToolbox中-總SpatialAnalystTools+翁IConditiunal+軫Density+筋Distance一智IExtra匚tiiji尹ExtractbyAttributes尹Extractby匚ircle滬ExtractbyMask尹ExtractbyPoints尹ExtractbyPolygon尹ExtractVdluestoPoints產(chǎn)5ampl已GeneralizationGeneralization在彈出窗口中填寫：1、DEM注地填洼在Fill中填洼廬Basin-卽Hyd

2、rology廬Basin尹FlowAccumulation尹FlowDirection尹FlowLength廬Sink尹SnapPourFuint尹StreamLink尹StreamOrder尹StreamtoFeatur已尹Watershed+翁Interpolatiun2、水流方向提取-輸HydrulogyBasin才Fill護(hù)1FlowA匚匚urnulatiunFlowDirection_FlowLength尹Sink滬SnapPourPoint滬StreamLink護(hù)1StreamOrder滬StreamtoFeature廬Watershed+卽Iit已中ulation3、匯流累計(jì)計(jì)算

3、-侖HydrologyABasin嚴(yán)Fill滬FlowAcizLimLilaticin尹FluwDirectiun廬1FlowLength尹Sink尹SnapPourPoint廬1StreamLink尹StreamOrder尹！5tr已3itoF已a(bǔ)ture廬1Watershed+翁Interpulation4、河網(wǎng)生成調(diào)出SpatialAnalyst工具欄，選擇rastercalculator,彈出填寫計(jì)算公式，然后evaluation。注意：800不是固定值，里面的High值來填寫5、添加控制點(diǎn)，提取子流域在catalog中新建圖層：createnewshapefill,命名為zhandi

4、an,然后在arcmap中加載該圖層，選取站點(diǎn)加載控制點(diǎn)-軫Hydrology尹Basin戸Fill滬FlowAccumulatiori滬FlowDirectinn廬FlowLength尹SinkSnapPourPointStreamLink廬Etr已a(bǔ)mOrder滬StreamtoFeature廬Watershed+対Iit已中ijbtiiMi-軫Hydrulogy尹Basin才Fill滬FlowA匚匚urnulatiun尹FlowDirectiun廬1FlowLength廬Sink尹SnapPourPnint廬1StreamLink滬StreamOrder尹StreamtoFeatureW

5、atershedInterpulation6、根據(jù)子流域切出水系Mult1diniEiimi.onTuulsNetworkAnalystToolS：Mult1diniEiimi.onTuulsNetworkAnalystToolS：=uTipleEServerToulsti：=lLAnalCondition：=LlDensityDist：=LTLzeE:stractionExtractbyAttribuEztractbyCir匚1已byMaskbyFjinbyPulygonbyRectan&-=V：iliie5toConversionTuulsM:dnagementTools柵格水系轉(zhuǎn)化為矢量

6、水系：Ai_cToolbox+零|3IiAiL：ly51Tools+AxL：=LlysisToole+脅|C：rtogi_aphyTooleEi-CorLversionToolsEFromRasterRastertoASCIIFZtrtoFloatRastertoPoint參RastmrtoFijlygijnRastert口pnlyline田田田田田田：田田ToCAIiToCoverageTodBASETcGeodataliSLEEToRastrToShapefileIshuiKiSaField(opti匚口81)VALUEUutputpulylineteaturm呂=A|E:MGH_stre

7、amnet2kmRasterT_shuixi22.shp色Backgruurnlv：dlue(optiun：dlJ1ZEROjjMinimumdanglelength(optional)0*/SimplifypulylinTxt文件轉(zhuǎn)化為柵格數(shù)據(jù)在arcgis中打開：邸krcToolbox+3DAiL：dlystTools+屯騎ArLiilyEieTijoIe+筆|C：=Lrtogi-：=LphyTools-CcnversionTools垮孑FromRas讎jiMetadat：=l筋ToCAD您jToCoverage翁To-dJiASEToGeodat：a匕且mm鑫iToRas由畝田：由田田日

8、ASCIIto陷航卓DEMtoRasterFeaturmtoRastmr-ToFloattoR：etmrFointtoRasterFulygontoRaEterFulylinetoR：=leRasterToOtherFormaShapefile柵格數(shù)據(jù)重采樣：1km數(shù)據(jù)重采樣成2km數(shù)據(jù)+$毎+$毎由.$白JomsLayerProjections：=ltli1Tfsile:s田畝S:S:S:S:S:S:S:S:S:S:E.krcTuolboxQ|3DAnalystToolsATL：dlysisToolsC：rtogi_：=LphyToolsConversionToolsUstsLDterope

9、rabilityTocUsiAslM：=LrL：igementToolsDiEconiLEctE己EilitingDisibLtSilGeodataba:DomainsF；：el弓七已匕RelationshipClassesEubtypQETableTopijlogyVersioreWorkspacecoiingToolsEr珀航旺護(hù)小AdiColormapg：BsiAchBui1dFyr:utii亀EntchCalculaSt護(hù)滬BuildFyr：=jTiids廬1BuildRasterAttri曠CalculateStatisti滬ClipCompoeiteBaiLd呂護(hù)11CopyRasterCopyRasterCat：=lLoCreateOrthoCorreCre：tEP:hl-sh：ii_pen滬CreateFLdTLilomRastCreateRasterC：+：=lCre：RasIlatsL護(hù)DeleteColormap廬1DeleteRasterA