Uncertainty in Environmental Data Integration into 3d Urban Information System

This paper introduces a 3D environmental urban information system which is to help urban designers and developers to analysing and evaluating the environmental impacts of their urban projects. Where urban data is acquired from 3D urban models and environmental data is often coming from simulation software. For realizing environmental impacts analysis, the environmental urban information must be embedded into urban information system. However, environmental data from different simulations is heterogeneous, especially in geometry. It is not easy to modelling common geometrical descriptions for all kinds of environmental data. In this case, the data of simulations can be inputted in different geo-database, but some queries basing on different environmental conditions will be not applied. Therefore, basing on regular meshes (both in 2D and in 3D), an approach for integrating environmental data in a same geo-database will be proposed. The approaches for integrating these data into one geo-database bring out some uncertainty. Looking for an approach for integrating environmental data that causes less uncertainty in the result is necessary. We discuss some uncertainty of integration process and introduce a solution for reducing the uncertainty.