应用3DGIS实现三维地籍:实践与挑战

Implementation of 3D Cadastre with 3DGIS:Practices and Challenges

人口的聚集和城市的建设使城市内形成许多复杂的三维空间,如跨街建筑、地上下一体化设施等。面对集约化土地利用和城市空间管理的需求,三维地籍应运而生。3DGIS提供3D目标建模技术,可以有效地进行3D目标几何表达与管理,并将其与空间对象的属性、语义或社会交易关联,为三维地籍的系统实现奠定技术基础。从三维地籍管理的需求和特征出发,探讨应用3DGIS实现三维地籍的产权体表达、建模、可视化等几个方面的实践和挑战。

Population aggregation and rapid development has promoted the 3D land use in the urban environment with the increasing requirements of the complex interweaving,such as dwellings,commercial area,public transportation and urban utilities and infrastructure.It has become a huge challenge for governments to manage 3Dland space breaking through the traditional 2 Dinformation system,which need the support of 3D techniques.3Dcadaster is raised to cater to the realistic requirements of them.At the same time,3D techniques in 3DGIS,including 3D data collection,3D data model,3D data management and visualization,have been applied in the fields such as urban planning,virtual city,which provided a suitable background and base for developing 3D cadastral systems.Also 3DGIS offers proper methods to represent the geometry of 3D cadastral objects and to associate the property rights,semantics and transaction attributes to them.Aimed to apply 3DGIS techniques for 3D cadastre in urban environment to bridge the gap between urban simulation and urban space management system,this paper elaborates the details of the applications of 3DGIS for 3D cadastre from the aspects of 3D data and 3D modeling,3D simulation and visualization,practice and decision-making support,and also the challenges we encounter during the practices are discussed.