In this paper the design of a new land-use modelling package, DELTA, is described. The focus is on the thinking behind the design and the model characteristics that have resulted rather than on the formal mathematical specification. The package has been designed to link with any appropriate...

Given that a firm currently operates facilities in a (retail) market, a competing firm considers entering this market by locating <i>r</i> facilities so as to maximize its market share. This problem, known as the maximum capture problem or as the (<i>r</i> | <i>X_p</i>)-medianoid problem, assumes, as do most location...

The combination of the paradigms of shape algebras and predicate logic representations is a paradigm capable of modeling maps that can support emergent features. First-order predicate logic provides a natural intuitive way of representing spatial relations in the development of complete computer...

The contrast between the city and its surroundings is sharp not only in the United States, but also in the Netherlands. There are no reasons to support any expectation of a spontaneous back-to-the-city movement in the near future. In 1997 the Dutch government announced a new policy to strengthen...

This paper represents an attempt to show how computation might be improved and reorganized to deal better with the imperatives of the planning profession and to improve its organizational setting. I will first sketch three underlying sets of circumstances: the state of urban development,...

A hundred or more techniques are used for urban environment improvement projects in Japan. The planner must therefore choose the most suitable one for the specific area to be improved. Our system is constructed to support planners who work on complicated problems. It integrates four software...