Viveca Asproth

GIS application for visualization of streams

Up to now, GIS systems have been used to produce maps. When using these maps, for example, to look at a road section, you are limited to one map-sheet at a time with a specific scale. A common application, for example, in communities and electricity companies, is to include networks such as water pipes, sewage systems, and electric mains. As the lines cross map-sheet borders, it has been necessary to put the map-sheets together. It is useful for communities to have up-to-date and accurate information about water pipes, to be able to locate leaks and to know where to cut off the lines and to know which consumers are affected, when repairing. In the future, GIS systems could also be used as decision and planning support. To be able to use GIS systems for this purpose, it is necessary to improve techniques for visualization of streams (direction and strength) over time. This paper describes a project that aims to develop and evaluate user interfaces for visualization of all kinds of streams and to improve and evaluate methods and CASE tools for development of GIS applications.

A decision support procedure in physical planning based on fuzzy logic modelling

The purpose of this paper is to enhance the possibility of making a good decision in complex decision situations concerning localisation of the most suitable physical position for an activity or a building. This will be accomplished by integration of the three procedures, CFD-Tool (Continuous Fuzzy Decision Management Tool), the MAD-Tool (Multi-Actor Decision Management Tool) and the CSL-Tool (Cross System Level Decision Tool), where all three methods using a fuzzy approach. The result is the FAS procedure, a procedure that handles the problems mentioned above with a fuzzy approach. The FAS-procedure is also the starting point of a computer based decision support for physical planning.