Renato Pajarola, Thomas Ohler, Peter Stucki, Kornel Szabo, and Peter Widmayer. The alps at your fingertips: Virtual reality and geoinformation systems. In Proceedings 14th International Conference on Data Engineering, ICDE '98, pages 550--557, 1998.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....a schedule, acting according to the schedule and, possibly, of adapting the schedule according to constraints imposed by the environment. Those components illustrate how to model complex agents within our model of media. V. Related Work The keyword new media is associated with multimedia [12], 13] with the design of information systems, or (distributed) artificial intelligence [14] 15] with the respective agent architecture [6] Those aspects have to be considered when refining the general model to an implementation of the platform. While there are a number of computational ....

R. Pajarola, Th. Ohler, P. Stucki, K. Szabo, and P. Widmayer, "The Alps at your fingertips: Virtual reality and geoinformation systems," in 14th. Int. Conf on Data Engineering (ICDE'98). 1998, pp. 550--557, IEEE Computer Sciety.

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Renato Pajarola, Thomas Ohler, Peter Stucki, Kornel Szabo, and Peter Widmayer. The alps at your fingertips: Virtual reality and geoinformation systems. In 16 Proceedings 14th International Conference on Data Engineering, ICDE '98, pages 550--557. IEEE, 1998.

....the Hilbert curve is independent of the data block size or the aspect ratio of the image. In a second experiment, we verified these statistical properties with a set of actual window queries. The window queries were chosen to reflect a dynamic navigation and visualization system such as ViRGIS [34] which requests nonoverlapping image regions of constant and almost square shape from the image database. In our test, we queried the image database with 56 square regions of size 10 10 km, or about 333 333 image pixels, which covered the whole image space. Summed over all 56 window queries, the ....

....compression algorithms such as lossless JPEG or CALIC. Furthermore, we implemented an experimental image database that provides spatial access to compressed images. This image database can also be used as a texture server to our real time terrain visualization system ViRGIS which is described in [34], 37] and [38] We feel that the presented Hilbert Compression proposal is a first step toward an investigation of how to perform spatial operations (or other complex operations) directly on the compressed data, yielding a compressed image as the result, with no decompression along the way. ....

R. Pajarola, T. Ohler, P. Stucki, K. Szabo, and P. Widmayer, "The alps at your fingertips: Virtual reality and geoinformation systems," in Proc. IEEE 14th Int. Conf. Data Engineering (ICDE'98), 1998, pp. 550--557.

....such an exploration mechanism is readily available: Visual realism and real time navigation are provided by typical virtual reality systems. Database functionality, including efficient access to huge amounts of geometric and texture data on disk, can be added with sophisticated coupling mechanisms [1]. With such a coupling, our application of interest can be fully supported: Mobile phone antenna positions and the induced signal strength distribution on a terrain can be visualized and explored in a virtual trip in real time, while the antenna and terrain data can be maintained in the database ....

....helps the user to better recognize terrain parts. The concepts that are required for the terrain explorer to handle huge amounts of terrain and texture data in a virtual reality manner (dynamic scene management, level of detail management) have been extensively studied in the ViRGIS project [1]. RA 3 DIO makes use of the same concepts. A link between RA 3 DIO and XGobi is very useful and interesting. It offers the possibility to analyze the various kinds of data provided by RA 3 DIO. An actual example are radiation emissions. RA 3 DIO can provide a large amount of data for visual ....

R. Pajarola, T. Ohler, P. Stucki, K. Szabo, and P. Widmayer. The Alps at your Fingertips: Virtual Reality and Geoinformation Systems. In Proceedings 14th International Conference on Data Engineering, ICDE '98, pages 550--557. IEEE, 1998.

....in simple hashing structures. Since the GIS data might reside on a workstation to which many users workstations are connected, we propose to run the database on the database server, while the graphics software (such as the IRIS Performer Toolkit) runs on the user side, for more details see Refs. [18]. Both parts of ViRGIS might of course run on the same machine, but will in general cooperate over a b The IRIS Performer Toolkit is a product of SiliconGraphics, Inc. c ObjectStore is a registered trademark of Object Design, Inc. network; in particular, we are currently implementing a WWW ....

R. Pajarola, T. Ohler, P. Stucki, K. Szabo, and P. Widmayer. The alps at your fingertips: Virtual reality and geoinformation systems. In Proceedings 14th International Conference on Data Engineering, ICDE '98, pages 550--557. IEEE, 1998.

.... visualization of the scene and all relevant data at the same time is crucial for the ease of use of the system as a whole (Hearnshaw Unwin 1994) Such a GIS interface could in fact be one of the prime examples of a post WIMP 1 user interface (van Dam 1997) The system we developed, ViRGIS (Pajarola, Ohler, Stucki, Szabo Widmayer 1998, Pajarola Widmayer 1998) maintains 3D terrain data in vector form (such as surface triangulations) raster data (such as satellite images) and non geometric data (such as population counts of cities) It allows a user to move through the scene in real time by means of a standard input ....

.... at the same time is crucial for the ease of use of the system as a whole (Hearnshaw Unwin 1994) Such a GIS interface could in fact be one of the prime examples of a post WIMP 1 user interface (van Dam 1997) The system we developed, ViRGIS (Pajarola, Ohler, Stucki, Szabo Widmayer 1998, Pajarola Widmayer 1998), maintains 3D terrain data in vector form (such as surface triangulations) raster data (such as satellite images) and non geometric data (such as population counts of cities) It allows a user to move through the scene in real time by means of a standard input device such as a mouse, and to ....

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Pajarola, R., Ohler, T., Stucki, P., Szabo, K. & Widmayer, P. (1998), The Alps at your Fingertips: Virtual Reality and Geoinformation Systems, in `Proceedings 14th International Conference on Data Engineering, ICDE '98', IEEE, pp. 550-- 557.

....important is that the different LODs do not have to be precomputed in advance and stored redundantly along with the original full resolution model. The different LODs must be efficiently extractable at any desired resolution from a compact multiresolution data structure. This is not the case in [12,17,18,19] but supported by the restricted quadtree data structure. As announced in the previous section, presentation of different regions at different LODs is managed by the dynamic scene manager. An independent resolution is assigned to each terrain patch by the scene manager. This LOD is driven by an ....

....to a tree traversal of the restricted quadtree where for every point only its height and error value must be sent. To benefit from transaction mechanisms such as concurrency control and failure recovery we advocate to integrate the terrain database into a commercial database management system. In [12] a terrain database using a hierarchical spatial data structure is integrated into ObjectStore, and [7] investigate on the integration of spatially clustering index structures into Oracle. 8. Conclusion We have proposed an efficient model for large scale terrain visualization. It turned out that ....

[Article contains additional citation context not shown here]

R. Pajarola, T. Ohler, P. Stucki, K. Szabo, and P. Widmayer. "The alps at your fingertips: Virtual reality and geoinformation systems". In Proceedings 14th International Conference on Data Engineering, ICDE '98, pages --. IEEE, 1998.

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Renato Pajarola, Thomas Ohler, Peter Stucki, Kornel Szabo, and Peter Widmayer. The alps at your fingertips: Virtual reality and geoinformation systems. In Proceedings 14th International Conference on Data Engineering, ICDE '98, pages 550--557, 1998.

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R. Pajarola, T. Ohler, P. Stucki, K. Szabo, and P. Widmayer, "The Alps at your fingertips: Virtual reality and geoinformation system," Proc. 14th Int. Conf. on Data Engineering, ICDE'98 , 1998.

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