简介：Takinghundredsofpiecesofhazardousgeologicalmaps(1:10000)ofThreeGorgesres-ervoirarea(3GR)asbackground,weestablishregionalthree-dimensional(3D)geo-hazardmodelusingDEM(digitalelevationmodel)superposedsurfaceimagesandgeo-hazardselements.Basedonlandslidesandothergeo-hazardsurveydata,usingimprovedB-REP(boundaryrepresenta-tion)entitydatastructure(two-body3Ddatastructure),wesetup3Dsolidmodelsforeachhazardousbodiesineachhazardousgeologicalmaps.Thenweintegratethetwotypesof3Dmodelswithdifferentscalesfromareatopoint,whicharetheregionalgeo-hazard3Dmodelandthesolidmodelsofeachdisasterbody,inordertoprovideavisualprocessingandanalysisplat-formfordangerpartition,stabilityevaluation,disasterpreventionandcontrol,earlywarningandcommand.

简介：通过对数字高程模型数据（DEM）进行水文及空间分析，提出确定水系沉积物化探取样快速定位方法，并建立空间分析模型。在新疆达坂城铜矿区应用表明：新方法可满足不同比例尺水系沉积物化探勘查工作，具河流分级合理、化探测量点定位准确、多元信息综合利用和精确部署野外工作等优势。