Virtual_globes

Virtual_globes - Perspective A representation of everything...

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A representation of everything The vision of a “digital earth” has captured the imagination of those involved with geospatial information since a now-famous speech by Al Gore at the California Science Center in 1998. The idea inspired a government initiative, a conference series and an international journal ( The International Journal of Digital Earth ), each with the long-term goal of achieving the vision described in the speech. Gore’s speech presented the perspective of a child during her interaction with a ‘mirror world’ – a digital copy of everything there is and has been – immersed in a virtual environment. The child’s geographical exploration experience required no prior training or education, but did involve the VR technology of 1998. Given technological developments since then, the current and future benefits of a digital earth not just for education but also for the geospatial analyst are self-evident. Since 1998, impressive progress has been made towards a digital earth. Starting with NASA’s World Wind (2004), many open A good Geo Virtual Environment implementation would provide the best digital earth approximation possible at present and host unlimited multi-sensory multimedia detail and allow for interaction as if it were the real world, with added analytical possibilities Persp ective Virtual globes or virtual source, freeware or commercial virtual globes and their portal managers or geobrowsers, have come into existence, and their impact has been to revolutionise our view of our planet. The early geobrowser Keyhole was purchased by Google and released as Google Earth in 2005 and has reached 400 million downloads by 2008, ten years after the Gore speech. Geobrowsers as entry points into virtual globes are increasingly more popular, and have become increasingly more “crowded” with cartographic and multimedia detail, especially when it is user- contributed. Not only can high resolution graphic data and geocodes be produced more easily today than ever before, geographical reality 26 | january 2011 geospatial TODAY
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In short, a good GeoVE implementation would provide the best digital earth approximation possible at present. Ideally, the Digital Earth GeoVE should host unlimited multi-sensory multimedia detail and allow for interaction as if it were the real world, with added analytical possibilities. At present, this would come through links to the current World Wide Web, such as geographic place to Wiki page linkages. Links to video, sound etc. and place-to-place links on the digital earth would require adding further information into the system and advanced research in technology and human computer interaction, e.g. better algorithms to handle large amounts of scale-dependent data, on-the-fly data fusion (multiple sources and scales) and level of detail management.
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This note was uploaded on 12/28/2011 for the course GEOG 128 taught by Professor Staff during the Fall '08 term at UCSB.

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Virtual_globes - Perspective A representation of everything...

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