X 3 DEarth Full Globe Coverage Utilizing Multiple

X 3 D-Earth: Full Globe Coverage Utilizing Multiple Datasets Dale R. Tourtelotte LT, USN

X 3 D-Earth All the benefits of X 3 D: – – Open ISO Specification Choice of implementations and tools Scripting capabilities Powerful browsers Geospatial accuracy (WGS 84, UTM, etc. ) True mapping of 3 D Geospatial coordinates to X 3 D’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 X 3 D 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 • Geo. VRML Elevation Grid • Outputs • X 3 D • VRML • Contoured Jpg • Grey Scale Jpg

Dr. Yoo and X 3 D-Earth • Terrain Tile Production Chain • Developed a method for generating X 3 D-Earth scenes from freely available sources • Uses a commercial software, Global. Mapper, to retrieve and convert the data • Uses an opensource software, Rez, to parse data and generate X 3 D-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 3 D tool for entering/exiting Foreign Ports

California Demo Terrain – DTED Level 0 – 1 km resolution • Input • Files = 111. dt 0 files • Size ≈ 4 MB • Output • Files = 37851. x 3 d files • Size ≈ 65 MB

California Demo Imagery – Natural. Vue 15 m resolution • Input • Files = 111. dt 0 files • Size ≈ 2700 MB • Output • Files = 37851. jpg files • Size ≈ 2600 MB

Globe Terrain – DTED Level 0 – 1 km resolution • Input • Files = 25, 594. dt 0 files • Size ≈ 1. 6 GB • Output • Files = 8, 727, 554. x 3 d files • Size ≈ 34 GB

Globe Imagery – Natural. Vue 15 m resolution • Input • Files = 3075 Geo. Tiff files • Size ≈ 3. 4 TB ≈ 218 GB as. jpg • Output • Files = 6, 046, 953. jpg files • Size ≈ 342 GB

Pitfalls and Lessons Learned • Choice of Image Formats • Two Formats received from NGA • JPEG-2000 – Limited support in Java • Geo. TIFF – Not supported by Rez Image. Slicer • 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 Demos MV 4205 Project MV 3204 Project Questions? ? http: //www. web 3 d. org/x 3 d-earth/ http: //x 3 d-earth. nps. edu/ Dale R. Tourtelotte drtourte@nps. edu