Virtual reality environments for geographic visualisation Essay Example for Free

practical(prenominal) verity environments for geographic visualisation EssayToday a wide variety of veritableistic worlds, cities and gaming environments live on and become part of life of their human inhabitants (Borner et al 2005). Navigation is playing an increasingly important consumption in realistic(prenominal) environments (VE). Today realistic worlds argon very large and present challenging sailplaning tasks. gibe to MacEachren et al (1999), virtual environment (VE) technologies arrive at considerable potential to extend the power of entropy visualization methods, and those of scientific visualization more broadly.reddle (1996) assertion of one in three nation get lost in virtual environment is true due to lack of knowledge merely is possible to roam and explore these geographic environments. Previous work have been done to develop tools that hark back visualisations of user and environment interaction for social gliding, monitor, study, and research virt ual worlds and their evolving landscapes. Visualization and navigation in virtual environmentsThe geovisualization of virtual environments use of 3D display and thus has the potential to depict the three geographic dimensions of real spaces with each dimension of the display space depicting a geographic dimension (MacEachren et al, 1999). There is pull ahead and developments in research and applications in this field. A lot has been developed, for example, Lahav and Mioduser (2003) developed and researched a multisensory virtual environment simulating spaces in real-life. Chen and Stanney (1999) came up with theoretical models of wayfinding, used to guide the design of navigational aiding in virtual environments.Galyean (2006) immersed VR baffle with the advantages of narrative structure to allow smooth and continuous interaction and demonstration with the structural and temporal qualities. Ruddle et al (1997). Tsai-Yen Li et al (2008) also developed a real-time camera control mo dule for navigation in virtual environments. The wayfinding process has embraced cognitive mapping, wayfinding plan development, and physical movement or navigation through a virtual environment. practical(prenominal) environment navigation has evolved drastically from archaic to post- innovational tools.There have been developments in virtual simulation of urban and rural environments using both traditional cartographic methods and modern geo- discipline technologies such as Google earth and fly-through movies. The recent developments in the use of satellite imagery, Digital Elevation Models and antenna Photographs have led to raw(a) lead large graduated table movies and virtual reality navigation processes. The approach path of these 3D geographic information systems (GIS) is fundamental for synoptic vie and virtual terrain recognition.Augmented reality as part of emerging concept allows live direct view of a physical real-world environment whose elements are augmented by virt ual. It is related to a more general concept called mediated reality in which a view of reality is modified and its augmentation is conventionally in semantic context with environmental elements. A Virtual Geographic Environment (VGE) is a multi-user shared, intelligent, virtual environment representing the real geographic environment to dispense geospatial analysis, carry our geovisualization, to support collaborative work, planning and decision making.According to Hui and Zhu (2004), virtual geographic environments consist of phoebe bird types of space, namely geographic data spaces, network spaces, multidimensional presentation spaces, social spaces and sensory/perceptual spaces. These virtual spaces make VGE different from the traditional virtual reality space associated with unrealistic expectations. VGE is equated with reality by making the spaces continuous and coextensive. Nguyen et al (2009) carried out various experiments to investigate effects of outdo changes on dista nce percept in virtual environments.The rural and natural environments basically involved use of existing natural elongated features and landmarks such as roads, cliffs and rivers to navigate. The new paradigm shifts (Joseph et al 2001), have tremendously tacked the issue of scale peculiarly on global views. The traditional experiences were profound and thus these new innovations have proved successful. For example, Vinson (1999) designed guidelines to succour navigation in large-scale virtual environments. The guidelines focus on the design and placement of landmarks in virtual environments.The distinct features and landmarks represented various areas like buildings, petrol stations and corners to direct the navigation process on a designated navigation route. This limits the audiences movement through the space to interesting and compelling paths. According to Ruddle (1996), examples of interface fidelity include the lack of physical movement that is required to travel virtua lly VEs and the impoverished field of view. Important factors of environment fidelity and precision include the amount of visual fact and the omission of non-visual sensory information.The virtual reality world has become interested in large scale spatial cognitive simulation. This takes a role of an environments physical form and how the design of a setting shapes the spatial behavior and cognition of its users. It largely puts into consideration numerous forms of spatial information real-world environments, virtual environments, maps, route directions, gestures, and both written and spoken descriptions (Mekni and Moulin Mekni (2008).Sensor Webs are deployed in large scale geographic environments for in-situ espial and data acquisition purposes, a perfect example of a dramatic solution to large scale simulation and virtual reality representation. Conclusion Advances in human-computer interaction have created completely new paradigms shifts for exploring and presentation spatial i nformation in a virtual environment, with flexible user control. Hence, more intuitive and competent interactive visualization environments become increasingly significant for the visual exploration of large amounts of extensive spatio-temporal information both at small scale and large scale.There is special focus on new geographic and cartographic applications which involve experts and users in the context of data visualization in real virtual environments. They are mainly developed to aid visualization in a natural extension of colloquy and functions in the visual thinking domain. References Bishop, I. D. , and C. Karadaglis. 1994. Use of interactive immersive visualization techniques for natural resources management. SPIE 2656128-139. Borner, K. , Penumarthy, S. , DeVarco, B. 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Zeleznik(2001) Hands-Free Multi-Scale Navigation in Virtual Environments. Brown University. Department of Computer Science, street corner 1910. Providence, RI 02912 Lahav, O. and Mioduser, D. 2003.6A blind persons cognitive map ping of new spaces using a haptic virtual environment. Journal of search in Special Educational Needs. Volume 3. Issue 3, Pages 172 177 MacEachren, A. M. , Edsall, R. , Haug, D. , and Ryan B. , 1999. Virtual Environments for Geographic Visualization Potential and Challenges. legal proceeding of the ACM Workshop on New Paradigms for Information Visualization and Manipulation, Kansas City, Nov. 6, 1999. MacEachren, A. M. , D. Haug, L. Quian, G. Otto, R. Edsall, and M. Harrower. 1998b. Geographic visualization in immersive environments.GeoVISTA Center, Penn State University, www. geovista. psu. edu/publications/i2. pdf. Mekni, M. and Moulin, B. 2008. A Multi-agent Geosimulation Approach for Sensor Web Management. 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M. 1997.Navigating buildings in desk-top virtual environments Experimental investigations using extended navigational experience. Journal of Experimental psychology Vol. 3, pp. 143-159. Tsai-Yen Li and Chung-Chiang Cheng 2008. Real-Time Camera Planning for Navigation in Virtual Environments. In Lecture Notes in Compute r Science. Springer Berlin. Vol 5166. Pages118-129. ISBN978-3-540-85410-4 Vinson, N. G. 1999. Design Guidelines for Landmarks to Support Navigation in Virtual Environments. Proceedings of CHI 99, Pittsburgh, PA. may 1999 Institute for Information Technology. National Research Council, Canada. Ottawa, ON K1A 0R6