简介:秦皇岛市国土资源局于12月13日成功挂牌出让了城市区3宗国有土地使用权,土地面积总计74.474亩,成交总额20066.936万元,实现政府纯收益约1.27亿元。其中:原德信医药公司33.6亩用地,由秦皇岛市宜安房地产开发有限公司以每亩316万元、总额10618.864万元取得,实现政府纯收益均8219万元:原耀华大修厂17.29亩用地,由秦皇岛市金亿房地产开发有限公司以每亩316万元、总额5462.376万元取得,实现政府纯收益约4274万元。该两宗地成交价格是该市历年来以净地条件下出让的最高价格。海港区兴隆村改造项目以每亩169万元、总额3985.596万元成交,实现政府纯收益约225万元。
简介:Thispaperdemonstratesanexperimentonthegenerationof3Dvirtualgeographicenvironmentonthebasisofexperimentalflightlaserscanningdatabyasetofalgorithmsandmethodsthatweredevelopedtoautomaticallyinterpretrangeimagesforextractinggeo-spatialfeaturesandthentoreconstructgeo-objects.Thealgorithmsandmethodsfortheinterpretationandmodelingoflaserscannerdataincludetriangulated-irregular-network(TIN)-basedrangeimageinterpolation;mathematical-morphology(MM)-basedrangeimagefiltering,featureextractionandrangeimagesegmentation,featuregeneralizationandoptimization,3Dobjectsreconstructionandmodeling;computergraphics(CG)-basedvisualizationandanimationofgeographicvirtualrealityenvironment.
简介:Dataacquisitionandmodelingarethetwoimportant,difficultandcostfulaspectsinaCybercityproject.2D-GISismatureandcanmanagealotofspatialdata.Thus3D-GISshouldmakethebestofdataandtechnologyof2D-GIS.ConstructionofausefulsyntheticenvironmentrequiresintegrationofmultipletypesofinformationlikeDEM,textureimagesand3Drepresentationofobjectssuchasbuildings.Inthispaper,themethodfor3Dcitylandscapedatamodelandvisualizationbasedonintegrateddatabasesispresented.Sincethedatavolumeofrasterareveryhuge,specialstrategies(forexample,pyramidgriddedmethod)mustbeadoptedinordertomanagerasterdataefficiently.Threedifferentmethodsofdataacquisition,theproperdatastructureandasimplemodelingmethodarepresentedaswell.Atlast,apilotprojectofShanghaiCybercityisillustrated.
简介:Basedonthearchitecturalsurveyprojectof“theChiLinNunneryRedevelopment'inHongKong,thispaperattemptstoinvestigatethetechniquesofbuilding3Ddigitaldocumentoflarge_scaletimberstructureandqualitycontrolduringconstructionbycomputer_based3Dsimulationforthewholeproject.Therewereseveralkeyissuesincludingprimarydataacquisition,3Dmodelinganddisplay,pre_assemblingthetotalbuildingandqualityexamination,etc.Inthispaper,someusefulexperiments,suchasthenewapplicationsofCCDdigitalcameras,imageandgraphprocessingsoftwarepackages(CAD,Photoshop,Photomodeler,Vexcel,etc.)tothearchitecturesarealsopresented.Thesemethodsintroducedinthispaperaresuitableforimageandgraphintegrateddatabasebuildingofcomplicatedarchitectures,andusefulforconvenientlymaintainingandreconstructingtheancientarchitectures.
简介:构造一个煤矿的虚拟景色是的3D为在煤采矿上现代化并且处理信息的客观要求生产。建立“一个数字矿”也是关键技术。由探索当前的世界范围的研究,软件和硬件工具和应用程序要求,与案例研究地点(Pingdingshan煤组的Daz-huang矿)结合了,为一个矿的3Dgeo可视化的一条途径出现工厂和矿车道深深地被讨论。在这研究,虚拟景色基于弧/信息和Site-Builder3D被学习的为一个大范围的快速的建模方法,和从2D景色的3D景色的自动产生被认识到。能从2D把矿车道系统变换成3D的如此的一个自动方法为Dazhuang矿被认识到。一些相关应用程序问题被学习,包括在在矿表面的虚拟景色的虚拟场面种的2D和3D和矿车道之间的属性质问,并列质问,距离措施,碰撞察觉和动态相互作用。一个原型系统被设计并且发展。
简介:Thispaperintroducestheprocessofmaking3DvectorscenographofanancientbuildingwithlargequantitiesofdatawiththeaidofAutoCAD,whichdisplaystheeffectofscenerydrawings.ThevitalskillsandtechniqueinvolvedareillustratedthroughtheexampleofPagodaofThousandsofBuddhainChiLinNunneryinHongKong.Thisconstructionwasstartedin1996andfinishedin1999withtheconcretestructureinternalandwoodexternal,imitatingthestyleofbuildingsinTangDynasty.Thus,3Dvectorscenographbecomeavailabletousers.
简介:本文阐述了基于ArcObjects的1:5万电子地图接边自动化实现流程,并对其中的关键技术及实现方法做了说明,并结合实验数据给出了测试结果。
简介:这份报纸论述现实虚拟的fusional校园环境。它是有一起合并的真实信息的一些方面的一个联机3D平台。整个站台与详细geo模型基于OpenSimulator代表大学校园。一些初步的实验被做为做geo环境与与虚拟校园集成现实主义的信息不仅详细说明了室内、室外的模型,而且与物理世界的真正的代表一起。全面动机是向一个框架提供对在合作3D当模特儿的reality-virtualityfusional的强壮的支持联机的为研究目的站台。
简介:二维地理信息系统远远不能满足人们的要求,取而代之的是建立空间的立体的三维GIS。不规则四面体被认为是最简单的数据表示方法之一,本文就三维Delaunay剖分及其在GIS中的应用作了阐述。
简介:EngineeringexcavationGIS(E2GIS)isareal-3DGISservingforgeosciencesrelatedtogeo-engineering,civilengineeringandminingengineeringbasedongeneralizedtri-prism(GTP)model.AstwoinstancesofGTPmodel,G-GTPisusedforthereal-3Dmodelingofsubsurfacegeologicalbodies,andE-GTPisusedforthereal-3Dmodelingofsubsurfaceengineeringexcavations.InthelightofthediscussionsonthefeaturesandfunctionsofE2GIS,themodelingprinciplesofG-GTPandE-GTPareintroduced.Thetwomodelscoupletogetherseamlesslytoformanintegralmodelforsubsurfacespatialobjectsincludingbothgeologicalbodiesandexcavations.Anobject-orientedintegralreal-3Ddatamodelandintegralspatialtopologicalrelationsarediscussed.