Abernathy, M., and Shaw, S., "Integrating Geographic Information in VRML Models", Proceedings of VRML Symposium 1998. Home/Search Document Details and Download
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Visualizing Terrain and Navigation Data - David Coombs Billibon (Correct)
....the elevation model the vehicle will use to plan its path (Figure 8) This local map covers 40 m 40 m with each cell 0.2 m 0.2 m. A scale vehicle (3 m 1 m 1.5 m) is rendered in the center of the map as a reference point. The model is described in VRML (Virtual Reality Modeling Language) [6]. Depending on the VRML browser used, the viewer can easily navigate the scene to explore the data from different viewpoints. The elevation model is described as a VRML ElevationGrid with a model of the vehicle placed on the terrain according to the vehicle s navigation data (from GPS and INS) ....
Abernathy, M., and Shaw, S., "Integrating Geographic Information in VRML Models", Proceedings of VRML Symposium 1998.
Modeling the Digital Earth in VRML - Reddy, Leclerc, Iverson, Bletter.. (1999) (Correct)
.... Linda off the west coast of Mexico (http: vrml.gsfc.nasa.gov ) Abernathy and Shaw recently presented work to visualize the course of a 197 relay race through the San Francisco Bay Area, using VRML to model the terrain and to overlay a track obtained from Global Positioning System (GPS) receivers [3]. The Image Processing Group at the University of Zagreb developed an interactive map of Croatia, where users could select a region and then view this in 3 D using VRML (http: petra.zesoi.fer.hr croatia ) For the most part, many of the VRML terrain models that have been produced are not ....
....coordinates directly in a VRML file. These coordinates are transparently transformed to geocentric coordinates to produce an ellipsoidal model of the earth, as seen on the left. The limitations of the VRML97 ElevationGrid node for serious geographic applications are well known [3]. The primary problem is that this node assumes that all heights are relative to a flat plane, but planets are curved objects, not flat. ElevationGrids are therefore only useful for modeling local regions where the earth s curvature is not significant (in the order of roughly 100 km 2 ) We have ....
Abernathy, M. and Shaw, S. (1998). "Integrating Geographic Information in VRML Models". Proceedings of the Third Symposium on the Virtual Reality Modeling Language, Monterey, CA. February 16-19, pp. 107-114.
Under the Hood of GeoVRML 1.0 - Martin Reddy Lee (2000) (Correct)
.... (UTM) VRML97 already provides an ElevationGrid node; however, in this node all values are offset from a single flat plane [6] This is acceptable if the area being modeled is small in extent, for example, less than 1 km 2 , but for larger areas the curvature of the earth becomes significant [1]. Figure 1 illustrates an example where we have created a GeoElevationGrid that spans the entire earth with all data specified in terms of a latitude longitude grid. The grid of latitude longitude heights is transparently converted into a Cartesian frame by the GeoElevationGrid node and ....
....node, we can insert these coordinates directly into a VRML file. Figure 2 illustrates a terrain model built using the GeoElevationGrid node with two tracks overlaid on the terrain representing the smoothed output from a GPS receiver. Abernathy and Shaw illustrated this general capability in 1997 [1]. However, we can now specify the data by using the actual latitude longitude coordinates received from the GPS sensor, meaning that we preserve the original data and obviate the nontrivial task of manually transforming and co registering this with the terrain. For example, in Figure 2, the ....
Abernathy, M. and Shaw, S. (1998). "Integrating Geographic Information in VRML Models". In Proceedings of the Third Symposium on the Virtual Reality Modeling Language, Monterey, CA. February 16-19, pp. 107-114.
Modeling the Digital Earth in VRML - Reddy, Leclerc, Iverson, al. (1998) (Correct)
.... off the west coast of Mexico (http: vrml.gsfc.nasa.gov ) Abernathy and Shaw recently presented work to visualize the course of a 1997 relay race through the San Francisco Bay Area, using VRML to model the terrain and to overlay a track obtained from Global Positioning System (GPS) receivers [3]. The Image Processing Group at the University of Zagreb developed an interactive map of Croatia, where users could select a region and then view this in 3 D, using VRML (http: petra.zesoi.fer.hr croatia ) For the most part, many of the VRML terrain models that have been produced are not ....
....latitude longitude coordinates directly in a VRML file. These coordinates are transparently transformed to geocentric coordinates to produce an ellipsoidal model of the earth, as seen on the left. The limitations of the VRML97 ElevationGrid node for serious geographic applications are well known [3]. The primary problem is that this node assumes that all heights are relative to a flat plane, but planets are curved objects, not flat. ElevationGrids are therefore useful only for modeling local regions where the earth s curvature is not significant (in the order of roughly 100 km 2 ) We have ....
Abernathy, M. and Shaw, S. (1998). "Integrating Geographic Information in VRML Models". Proceedings of the Third Symposium on the Virtual Reality Modeling Language, Monterey, CA. February 16-19, pp. 107-114.
Generation of VRML City Models for Focus Based Tour Animations.. - Schilling (2003) (Correct)
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Abernathy, M. and S. Shaw (1998): Integrating Geographic Information in VRML Models. In Proceedings of the Third Symposium on the Virtual Reality Modeling Language, Monterey, CA. February 16-19, pp. 107-114.
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