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X3D-Earth: Full Globe Coverage Utilizing Multiple Datasets Dale R. Tourtelotte LT, USN. X3D-Earth. All the benefits of X3D: Open ISO Specification Choice of implementations and tools Scripting capabilities Powerful browsers Geospatial accuracy (WGS84, UTM, etc.) - PowerPoint PPT Presentation
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X3D-Earth: Full Globe Coverage Utilizing Multiple
Datasets
Dale R. TourtelotteLT, USN
X3D-Earth
All the benefits of X3D:– Open ISO Specification– Choice of implementations and tools– Scripting capabilities– Powerful browsers
Geospatial accuracy (WGS84, UTM, etc.)True mapping of 3D Geospatial coordinates to X3D’s Cartesian X, Y, Z coordinates
Dr. Chris Thorne and Rez
•“Open source framework and tools for translating gridded data, mainly geospatial, to different formats including images and multiresolution models for X3D or VRML web browsing”
•Java program with multiple input/output plugins
•Can be executed using a GUI or command line
Rez (cont.)
•Inputs• DTED• ASCII Grid• XYZ• DEM• GeoVRML Elevation Grid
•Outputs• X3D• VRML• Contoured Jpg• Grey Scale Jpg
Dr. Yoo and X3D-Earth
•Terrain Tile Production Chain• Developed a method for generating X3D-Earth
scenes from freely available sources• Uses a commercial software, GlobalMapper, to
retrieve and convert the data• Uses an opensource software, Rez, to parse
data and generate X3D-Earth Terrain Tile pyramids and Imagery Pyramids
Terrain Tile Production Chain
Dr. Yoo (cont.)
•Low Resolution Globes• He used the Terrain Tile Production Chain
method to generate Low Resolution Globes
My Background
•Surface Warfare Officer
•Last Job – Navigator on DDG in Norfolk, VA
•Deployments – Navigated into 18 Foreign Ports, 5 major Strait transits, and over 25,000 Nautical Miles
•Needed a 3D tool for entering/exiting Foreign Ports
California Demo
Terrain – DTED Level 0 – 1km resolution
•Input•Files = 111 .dt0 files•Size ≈ 4MB
•Output•Files = 37851 .x3d files•Size ≈ 65MB
California Demo
Imagery – NaturalVue 15m resolution
•Input•Files = 111 .dt0 files•Size ≈ 2700MB
•Output•Files = 37851 .jpg files•Size ≈ 2600MB
Globe
Terrain – DTED Level 0 – 1km resolution
•Input•Files = 25,594 .dt0 files•Size ≈ 1.6GB
•Output•Files = 8,727,554 .x3d files•Size ≈ 34GB
Globe
Imagery – NaturalVue 15m resolution
•Input•Files = 3075 GeoTiff files•Size ≈ 3.4TB ≈ 218GB as .jpg
•Output•Files = 6,046,953 .jpg files•Size ≈ 342GB
Pitfalls and Lessons Learned•Choice of Image Formats• Two Formats received from NGA• JPEG-2000 – Limited support in Java• GeoTIFF – Not supported by Rez ImageSlicer
•Use of Java to manipulate Image files• Out of Memory Issues
•Capability Gap of Rez• Initial Tests and Included Examples “proved” the
capability•Unknown limitations of Hamming Supercomputer• Maximum number of files for a File System
Other DemosMV4205 ProjectMV3204 Project
Questions??
http://www.web3d.org/x3d-earth/http://x3d-earth.nps.edu/
Dale R. [email protected]