資源描述:
《GIS耕地地力評(píng)價(jià)指導(dǎo)步驟》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、ArcGIS實(shí)驗(yàn)大綱口的和要求:通過(guò)兩周實(shí)習(xí)加深對(duì)課堂知識(shí)的理解與認(rèn)識(shí),增強(qiáng)實(shí)際動(dòng)手能力、分析問(wèn)題解決問(wèn)題的能力和創(chuàng)新能力。實(shí)驗(yàn)指導(dǎo)書:《地理信息系統(tǒng)空間分析實(shí)驗(yàn)教程》,湯國(guó)安,楊聽編寫,科學(xué)出版者出版實(shí)驗(yàn)主要內(nèi)容:矢量化及制圖笫一周:耕地地力評(píng)價(jià)空間分析第二周:空間分析練習(xí)準(zhǔn)備數(shù)據(jù):1、樣點(diǎn)數(shù)據(jù)(dbf,導(dǎo)成點(diǎn)文件)a)通過(guò)導(dǎo)入xy數(shù)據(jù)將dbf導(dǎo)入到系統(tǒng)中ToolxfindowKelp§:gEditorToolbarAddnDm-0樣點(diǎn)數(shù)據(jù)索萌Selection[ool%Vindov{{tipSt
2、lactByMtxibutezSelectByLoealioa.電SelectByLocation(?l(xLetsyouselectfeaturesfromoneorrnorelayersbasedonwheretheyarelocatedinrelationtothefeaturesinanotherlayer.Iwantto:selectfeaturesfromthefollowinglayer($):叼祥點(diǎn)數(shù)據(jù)□索領(lǐng)廠Only^iowselectablelayersinthislisttha
3、t:
4、intersectthefeaturesinthislayer:竊索錘廠」「
5、匚j(0featuresselected)廠AoplyabuffertothefeaturesinOKI即ply2、土壤數(shù)據(jù)(全市需裁減)a)加載土壤數(shù)據(jù)b)加載索鎮(zhèn)行政區(qū)數(shù)據(jù)c)運(yùn)用空間分析里的裁剪,將土壤數(shù)據(jù)裁剪成索鎮(zhèn)大小。cToolbox+3DAnalystTools-AnalysisTools-ExtractII[■ZClip?電和労沙3"滬Select尹Split/ClipInputFeatur苗
6、D:實(shí)
7、驗(yàn)數(shù)據(jù)±t3hturangJZlip?shpXYTolerance(optional)3、地貌數(shù)據(jù)(全市需裁減)同上4、灌溉分區(qū)(柵格格式,需轉(zhuǎn)格式)多種方法:1)轉(zhuǎn)換格式法(raster-vector)2)矢量化法,見6礦化度圖數(shù)據(jù)處理3)運(yùn)用arcscan自動(dòng)矢量化法轉(zhuǎn)換格式步驟:-專
8、ConversionTools一FromRasterRastertoASCIIRastertoFloatRastertoPoint?…護(hù)RastertoPolygonRastertoPolygonInputra
9、sterField(optional)5、現(xiàn)狀圖(捉取耕地地類)兩種方法:A:1)加載數(shù)據(jù)2)選取111-115之間的地類3)導(dǎo)出數(shù)據(jù)時(shí)只導(dǎo)出選取部分?jǐn)?shù)據(jù)U5DLsl]SelectByAttributes...佩Find&Replace…ClearSele匚tioriSwitchSelectionSelectAllAddField...SelectbyAttributesMethod:anewselectionEnteraWHEREclausetoselectrecordsinthetablewin
10、dow.:w-積長(zhǎng)類?ID面周地???■>rdinaterZi?tryiresilityTcTool*onEdit&nc^odalabt電>CopyXRemove回OpenZUtrtxXe[ableJonsandRelates?sZoomTolayer?ZotmToMakeMbbSfeRangeCcxwertFeaturestoGraphics...ConvertSyrnfeotogytoRepresentation...ExportDataExport:electedfeaturesUsethes
11、amecoordinatesystemas:Qthislayer'ssourcedata「thedataframerthefeaturedatasetyouexportthedatainto(onlyappliesifyouexporttoafeaturedatasetinageodatabase)Outputshapefileorfeatureclass:
12、D:Expo(LOutput$hp3—刁iB:4)通過(guò)toolbox中的提取工具,直接寫SQL表達(dá)式提取-AnalysisToolsF:軫E
13、xtractjbZClip,尹Select,ZSplit96、礦化度圖(掃描圖片格式,需矢量化,并配準(zhǔn))a)加載圖片格式的礦化度圖b)創(chuàng)建區(qū)圖層文件,加載區(qū)圖層文件c)在區(qū)圖層文件上對(duì)礦化度圖矢量化d)建立礦化度字段,錄入礦化度數(shù)據(jù)e)建立空間數(shù)據(jù)庫(kù),將矢量化好的文件導(dǎo)入,進(jìn)行拓?fù)溴e(cuò)誤檢查具體步驟:1)直接繪制:sIPreviewMetadat分區(qū)據(jù)度區(qū)邊界XMLDocument&GroupLayer_IFolderc二jFileGeodatabasecjPerso