Visualization in spatial modeling

This chapter deals with issues arising from a central theme in contemporary computer modeling - visualization. We first tie visualization to varieties of modeling along the continuum from iconic to symbolic and then focus on the notion that our models are so intrinsically complex that there are many different types of visualization that might be developed in their understanding and implementation. This focuses the debate on the very way of 'doing science' in that patterns and processes of any complexity can be better understood through visualizing the data, the simulations, and the outcomes that such models generate. As we have grown more sensitive to the problem of complexity in all systems, we are more aware that the twin goals of parsimony and verifiability which have dominated scientific theory since the 'Enlightenment' are up for grabs: good theories and models must 'look right' despite what our statistics and causal logics tell us. Visualization is the cutting edge of this new way of thinking about science but its styles vary enormously with context. Here we define three varieties: visualization of complicated systems to make things simple or at least explicable, which is the role of pedagogy; visualization to explore unanticipated outcomes and to refine processes that interact in unanticipated ways; and visualization to enable end users with no prior understanding of the science but a deep understanding of the problem to engage in using models for prediction, prescription, and control. We illustrate these themes with a model of an agricultural market which is the basis of modern urban economics - the von Thünen model of land rent and density; a model of urban development based on interacting spatial and temporal processes of land development - the DUEM model; and a pedestrian model of human movement at the fine scale where control of such movements to meet standards of public safety is intrinsically part of the model about which the controllers know intimately. © Springer-Verlag Berlin Heidelberg 2006

Developing student spatial ability with 3D software applications

This paper reports on the design of a library of software applications for the teaching and learning of spatial geometry and visual thinking. The core objective of these applications is the development of a set of dynamic microworlds, which enables (i) students to construct, observe and manipulate configurations in space, (ii) students to study different solids and relates them to their corresponding nets, and (iii) students to promote their visualization skills through the process of constructing dynamic visual images. During the developmental process of software applications the key elements of spatial ability and visualization (mental images, external representations, processes, and abilities of visualization) are carefully taken into consideration

TECHNIQUES AND METHODS OF GIS FOR REGIONAL DEVELOPMENT

The paper presents some techniques and methods of geographic informatics systems, adapted and applied to the regional development applications. The characteristics of spatial databases, as they are required for regional applications are presented in the first part of the paper. Methods of displaying spatial data are compared and GIS procedures are described. The main techniques available in the GIS and useful for regional data visualization are exemplified. It is presented a case study that illustrates the use of GIS for analyzing the concentration of economic activities, based on employment datasets, for various branches in Romania’s counties.regional development, GIS, regional data visualization, cartogram, spatial analysis.

Visuo-spatial ability in colonoscopy simulator training

Visuo-spatial ability is associated with a quality of performance in a variety of surgical and medical skills. However, visuo-spatial ability is typically assessed using Visualization tests only, which led to an incomplete understanding of the involvement of visuo-spatial ability in these skills. To remedy this situation, the current study investigated the role of a broad range of visuo-spatial factors in colonoscopy simulator training. Fifteen medical trainees (no clinical experience in colonoscopy) participated in two psycho-metric test sessions to assess four visuo-spatial ability factors. Next, participants trained flexible endoscope manipulation, and navigation to the cecum on the GI Mentor II simulator, for four sessions within 1 week. Visualization, and to a lesser degree Spatial relations were the only visuo-spatial ability factors to correlate with colonoscopy simulator performance. Visualization additionally covaried with learning rate for time on task on both simulator tasks. High Visualization ability indicated faster exercise completion. Similar to other endoscopic procedures, performance in colonoscopy is positively associated with Visualization, a visuo-spatial ability factor characterized by the ability to mentally manipulate complex visuo-spatial stimuli. The complexity of the visuo-spatial mental transformations required to successfully perform colonoscopy is likely responsible for the challenging nature of this technique, and should inform training- and assessment design. Long term training studies, as well as studies investigating the nature of visuo-spatial complexity in this domain are needed to better understand the role of visuo-spatial ability in colonoscopy, and other endoscopic techniques

Centrality Measures in Spatial Networks of Urban Streets

We study centrality in urban street patterns of different world cities represented as networks in geographical space. The results indicate that a spatial analysis based on a set of four centrality indices allows an extended visualization and characterization of the city structure. Planned and self-organized cities clearly belong to two different universality classes. In particular, self-organized cities exhibit scale-free properties similar to those found in the degree distributions of non-spatial networks.Comment: 4 pages, 3 figure

Experimental aspects of halographic interferometry

Q-switched ruby laser holography with optical equipment to compensate for spatial and temporal incoherence for contouring, aerodynamic visualization, and nondestructive testin

Spatial visualization ability among engineering students in Malaysia

A spatial visualization ability is very important in engineering field and it is positively correlated with achievement in engineering disciplines. Therefore, this research was carried out to identify the spatial visualization ability by engineering students in Malaysia. Given that first-year engineering students enter the academic field of engineering with a variety of backgrounds and experiences, and thus, varying degrees of spatial visualization ability development. It required for additional attention and effort in some students to get a better result in their study. Sometimes standard instruction and coursework at the introductory level of engineering graphics is not enough. Students on this lower end of visualization skill development need to close the gap between the level of their skills in this area and the level skills of their peers ( Piburn et al, 2002; Fennema & Sherman, 1977). Since spatial visualization ability skills are essential for success in engineering and other technical fields of study, it is important to develop visualization ability during the developmental years of students. Therefore, this research will lead us to achieve the following research objective, to access the engineering students? spatial visualization ability in Malaysia according to year of study and according to gender. This research is using descriptive statistics to find the central tendency especially mean value, frequency and percentage of the data. The finding spatial visualization ability of engineering student at in Malaysia is to be at moderately high. This is based on the achievement of the proficiency testing of each aspect of visualization test involved in this study. Thus, suitable teaching approach should be taking into consideration in order to provide the right technique to enhance students' spatial visualization ability

Mega-City-Regions: on Awareness and Value Chain Approach

Mega-City-Regions (MCR) as a new large-scale urban phenomenon have been gaining attention recently: In research, empirical studies address their functional consistency, and spatial planning policies underline the strategic role of MCRs for territorial competition of a country. But increasingly a tension between the functional logic of knowledge-intensive business activities and the territorial and normative approaches of public bodies begin to emerge. Typical conflicts of spatial development in MCRs occur for example when globally motivated investment decisions hit upon the local needs. This paper proposes an integrated view that can help to bridge the gap between the growing factual knowledge about MCRs and the still weak ability to use this knowledge for local and regional development and spatial planning purposes. The proposed integration draws on the one hand from the corporate-based value chain approach: The interaction of analysis of spatio-economic development, its adequate visualization and focussed communication towards stakeholders is apt to bring about the initiating momentum for beneficial spatial development. In the context of a diffuse perception of MCRs – whose mere size surpasses our common notions of space – analysis, visualization and communication as methodological components in the spatial planning process add value to sustainable spatial development. The process starts with creating awareness for the often invisible and complex functions, qualities and identities of the MCR spatial scale. New strategies of visualization and communication are needed to improve insight and motivation of the actors involved. On the other hand this value chain approach has to be adapted to the varying vertical levels of public bodies with their numerous policies. Thus, “multi-level-governance†is to be conceived as a concept to close the gap between the territorial and the functional logic of spatial development. The paper will study this dual approach with the case of the announced expansion of the international airport in Munich. This complex multi-level-governance process experiments with a consensus-oriented dialogue platform – the so called “neighbourhood conference†(NC) – bringing together actors with divers responsibilities and objectives. The NC sits at the interface of global and local objectives that are transformed on the spatial scale of the MCR of Munich. The paper concludes with recommendations for using the above described spatial value chain approach for more efficient multi-level-governance.