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OpenWebGlobe is a project and technology for processing and interactively visualizing vast volumes of geospatial data in a 3d virtual globe. The OpenWebGlobe virtual globe can have several data categories like image data, elevation data, points of interest, vector data, and 3D objects. Before streaming such massive and complex data over the internet, this data must be pre-processed. Such pre-processing usually comprises a transformation from a local to a global reference system, creation of pyramid layers or levels of detail (LOD), tiling of the data, and optionally compression and encryption. Recently, these algorithms were ported to high performance compute cluster using OpenMP and MPI and are also released as open-source. Because data sets are usually large, containing several terabytes, advanced out-of-core rendering mechanisms with a level of detail approach are used for visualization.〔Martin Christen, Stephan Nebiker, OpenWebGlobe SDK, an Open Source High Performance Virtual Globe SDK for Open Maps, in Manuela Schmidt and Georg Gartner, editors, Proceedings of the 1st European State of the Map, 2011, available at https://sotm-eu.org/userfiles/proceedings_sotmEU2011.pdf〕 OpenWebGlobe is an open-source project. It is written in WebGL. The lead developer is the Institute of Geomatics Engineering at the University of Applied Sciences Northwestern Switzerland ''((ドイツ語:Fachhochschule Nordwestschweiz))''. == Developing Globe Applications == The OpenWebGlobe SDK is also a 3D engine on top of WebGL. With the OpenWebGlobe SDK it is possible to create custom virtual globe applications. This JavaScript "Hello World" example〔OpenWebGlobe Tutorials, http://wiki.openwebglobe.org/doku.php?id=tutorials〕 creates a virtual globe and adds an image and elevation layer: ; ogAddImageLayer(globe, imgBlueMarble500); ogAddElevationLayer(globe, elvSRTM_CH); // (4) Set the background color ogSetBackgroundColor(ctx, 0.2,0.2,0.7,1); } 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「OpenWebGlobe」の詳細全文を読む スポンサード リンク
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