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- W203203460 abstract "Visual representation of three dimensional geospatial information is an often requested feature of oceanographic data management systems. The Monterey Bay Aquarium Research Institute's Expedition Database provides access to data from over 2500 submersible dives beginning in 1988. Visualizations of these dives have been produced and are now accessible through a simple web browser interface. The World Wide Web, database management software, and 3D graphics processing units have advanced to enable simplified viewing of complex data. However; issues such as single precision graphics pipe-line arithmetic and geographic coordinate transformations complicate the presentation of geospatial data. GeoVRML is an open international standard that has been developed to address these issues. In addition to being an ISO standard, GeoVRML provides tools and recommended practices for representing 3D geographic data. Any sort of geospatial data can be represented in GeoVRML including high-resolution bathymetric data, submersible dive tracks, remotely sensed imagery, and animated 3D objects. Furthermore, interactivity with the data may be provided with standard Virtual Reality Modeling Language (VRML) scripts and prototypes. Content placed in GeoVRML format is viewable inside a web browser and can be integrated with web-based data delivery systems to provide easily understood visual representations of geospatial data. MBARI uses GeoVRML to disseminate 3D replays of submersible dive data stored in its Expedition Database. Terrain data, ship and vehicle navigation, environmental (CTDO) data, video frame grabs, samples data, and video annotation information can all be viewed together using this tool. Tools to generate GeoVRML terrain content have been developed and are provided in the open-source tsmApi and MB-System packages. These tools may be used to convert bathymetric data into multi-resolution quad-tree hierarchical tiles that load efficiently over wide area networks. The level of detail for the terrain is controlled by the user who may interactivly select terrain tiles for higher resolution display. Up to 9 levels of detail (10 m resolution over a distance of 55 km) are effectively visualized using this method." @default.
- W203203460 created "2016-06-24" @default.
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- W203203460 date "2002-12-01" @default.
- W203203460 modified "2023-09-28" @default.
- W203203460 title "Using GeoVRML for Visual Dissemination of Oceanographic Data" @default.
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