Parametric Modeling Increasing Visualization to Give Support to Decision Making in Urban Policies and Projects

The conceptual and practical approaches related to the urban space arrangements present as main characteristic the need of dealing with complex systems, which are to be recognized as being composed by different variables, constituted of different actors, values and dynamics. Time and space are constantly changing, being able of representation by the respective models frame, which are periodical, spatial, conceptual and methodological outlines. In the proposal of such models is found the main contribution of the urban planner, for acting as the decoder of the values in accordance with the different points of view, presenting portraits of the addressed complexity and, ultimately, plays the role of being the collective will transmitter on policies and projects that will regulate the common asset. Among the mostly used methods to structure the ways of regulating the urban landscape it is found the respective breakdown into main criteria, being followed by the integration of such main components for the composition of syntheses that respond the questions to be dealt with. It is the MCE - Multi Criteria Evaluation. Regarding urban planning there are many demands for there are too many actors and interests and specific points of view involved, many variables and in constant changing, and it is necessary to use clear supported criteria in order to obtain the best clarity for the decision making process. The Multi-criteria Analysis had its first application even before the dissemination of the Geographical Information Systems, being that the author are going to favor the criteria integration approach and then expanded by the systemic approach (McHarg, 1969; Chorley and Haggett, 1967, Berry and Marble, 1968). With the introduction of the computational support the process was significantly broadened and there have been developed studies that explore the methodological possibilities (Eastman et al., 1993; Malczewski, 1996, 1999, 2006, 2015; Tomlinson, 1999; Jankowski and Nyerges, 2001; Goodchild, 2004). Reality is broken into main component variables know as criterion, organized as information plans. In each plan the distribution of the mapped criterion is associated to the level of adequacy for the process assessment, in order to be ranked. In addition to the work on each level or criterion, it is also due to be defined the role of each one in the final synthesis, which is known as weigh. The weigh represents the level of significance of that variable with the purpose of the current investigation. For the final frame, logic is that one of the weighted average of weighs and grades. The definition of weigh is related to the choice of a Policy for the urban planning, once it assigns hierarchy to the criteria to be combined. By increasing the weight of a variable in the combination of a set of variables, it gets more defining regarding the urban transformations. On the other hand, the grades definition means the level of adequacy of each component for investigation purposes so the activity of proposing a Project means substituting the content of existing grades within the spatial units that will take such transformations. At the assigning of weights the processes are split into knowledge driven evaluation or data driven evaluation (Bonham-Carter, 1994; Moura, 2007). The Knowledge Driven Evaluation follows the decision makers´ opinions according to their experts´ perspective or according to the significance level. In the Data Driven Evaluation it is observed how criteria behave in relation to the reality outline, where the expected was accomplished, and weights are applied in function of the observed hierarchy. Among the weights assignment methods, best-known ones are the AHP - Analytic Hierarchy Process, proposed by Saaty (1980) and the Delphi, proposed by the RAND - Research and Development - US army department (Dankey and Helmer, 1963; Linstone and Turoff, 2002). Among the me