3D Data and Model Management for the Geosciences with Particular Emphasis on Topology and Time

The doctoral thesis deals with the examination of methods for topological data handling, as well as designing and implementing a toolkit for the geosciences for management of topological and temporal 3D data and models in geo-database architectures. The conceptual work and realisation process takes into account the management of multi LoD since it is considered to be an integral part of geo-modelling

Spatio-Temporal Data Handling for Generic Mobile Geoinformation Systems

Within this thesis, a workflow for an efficient and practical handling of spatio-temporal data is presented. This workflow consists of three layered parts. The first part is the efficient management of spatio-temporal data. The second part focuses on the development of Web services for the dissemination of spatio-temporal data. The third part is a generic mobile GIS for professional users as a typical application for the spatio-temporal data management model and the related Web services

EFFICIENT AND PRACTICAL HANDLING OF SPATIO-TEMPORAL DATA BASED ON TIME-DEPENDENT NET COMPONENTS

The monitoring of spatio-temporal phenomena such as the movement of glaciers or volcanos produces huge amounts of data. Especially the handling of time as a fourth dimension usually requires terabytes of storage space. Therefore, an appropriate data management model for an efficient handling of such data is required and a key concept for any 3D/4D GIS. Within this paper, a comprehensive data management model is presented that optimizes the handling and storage of spatio-temporal data. The concept of time-dependent Net Components is introduced to handle regions that are monitored and modelled in individual time steps. Combined with the concept of Point Tubes the resulting data management model is used to manage spatio-temporal data based on d-simplicial complexes with dimensions d ∈ {0,1,2,3}. It is shown that the model is capable of handling various kinds of spatio-temporal applications. These include the proper handling of variable temporal discretizations of partial regions within a 4D model. The storage requirements are reduced and spatial as well as spatio-temporal operations are accelerated significantly. Critical issues such as the preservation of the net topology between time steps and the handling of boundary regions of adjacent net components can be solved