In physics, objects can be divided into rigid and soft objects according to the object deformation capacity. Similarly, geo-object can also be classified into rigid geo-objects (e.g., building, urban) and soft geo-objects (e.g., mudflow, water, soil erosion). There are three types of approaches for 3D GIS modeling, i.e., surface-based, volume-based, and hybrids in terms of geometry. These appro...

3D data modelling is one of the key problems within research works of 3D GIS. This paper focused on the research of a topological model based on space partition for 3D GIS. Firstly the formal definition of 3D spatial features were given. Then the methods for calculating topological properties to support simplexes topologically equivalent to an n-manifold with (n-1)-pseudomanifold boundary cycle...

Convergence is occurring in the fields of architectural and engineering design, construction, and GIS. The primary goal is to ensure that everyone working on a building, road or highway, and infrastructure project has a seamless flow of design information. The primary business drivers for this transformative technology advance are productivity and efficiency in the design, construction and faci...

Based on cell complex theory, after analyzing the corresponding relationship among cell, cell complex and 3D spatial solid, a formal definition for 3D spatial solid is presented. Through analyzing the geometric constructing relationship between cell and cell complex, we induce element boundary define and adhesive relationship existed in 3D spatial object; analyse three kinds of non-manifold cas...

In this paper, we present a data model for 3D geometry and topology in a 3D-GIS. This data model includes the concept of several views for the same feature, which enables several presentations of the same data. Together with a spatial index, this view-concept will be used to visualize the 3D-GIS data in a distributed networking environment. The data model and the progressive transmission is tes...

The original aim of the 3D GIS project DILAS (Digital Landscape Server) was the efficient generation, management and visualisation of large 3D landscape and city models. Thus, the primary focus was placed on 3D objects with often generalised geometry and on medium to small scale representations. The result of the first project phase was an operational prototype of a 3D GIS based on an object-re...

Modern city system has increasingly become more complex in spatial context, with impressive 3-dimensional features shown on its skyline, such as high-rise buildings, road flyovers, tunnels and underground infrastructure. Focusing on such complex system, Urban GIS, traditionally only concerns about 2-dimensional spatial relationships, has now pushed to analyse, model and manage the 3-dimensional...

2 Summary 2D cadastre systems have shown limitations, especially when describing complex situations to various stakeholders. 3D information models for cadastre are now increasingly implemented to overcome these restrictions. However, 3D systems are not without their challenges and problems to be avoided. The challenges include: guaranteeing topological consistency when building 3D volumes, dete...

Next generation of GIS software should be able to manipulate and analyse complex situations of real world phenomena. One of the desired components in such software or system is the geometric modeling that works with 3D spatial operations. This paper presents a portion of problem that we currently attempt to solve, that is the 3D spatial operations for Geo DBMS. Some popular spatial operations i...

The establishment and visualisation of large, reality-based 3D landscape and city models has received significant attention over the last few years – both in the scientific and the commercial community. Recent progress in 3D data capturing and web-based visualisation technologies are opening up new possibilities for a wide-spread use of 3D landscape models as a basis for new and exciting inform...