exploreB2B - The Intelligent way of Networking DoppelLab | Tools for Exploring & Harnessing Multimodal Sensor Network Data Terrain Packages and Projects - Noncommercial 3DEM freeware; was once commercial, finally abandoned in 2008, but still useful viewer and converter for DEM files both non-realtime and realtime rendering, using OpenGL reads DEM, SDTS DEM, NED, GTOPO30/GLOBE, SRTM, MOLA, Mars DTM, ASTER, and raw data drapes DRG, GeoTIFF and TMS (TIGER Map Server) images merges multiple input file, writes elevation to TerraGen, USGS DEM and many bitmap formats writes textured polygonal scenes to VRML, can save flyovers as AVI or MPEG can display GPS receiver waypoints, routes, and tracks Biosphere3D 3D viewer with significant support for vegetation using plants from Lenné3D Flora3D A unified view from planet to ground level. Limited interaction: fly around, turn layers on/off. osgEarth A 3D earth, based on OSG, cross-platform and open source (LGPL). Instead of OSG's rigid ive paging files, has its own ".earth" format and supports dynamic access to data source like OGC WMS. No binaries; you must build it from the C++ source. WebGL Older / Historical
Welcome to The Computer Graphics Society NAVVIS system guides users through buildings via a collection of photos The NAVVIS interface on a user's smartphone Image Gallery (3 images) While we’ve pretty much got to the point where we take GPS-enabled navigation systems for granted, there’s one rather prominent place where they can’t access the necessary satellites – indoors. A number of projects have taken on the challenge of indoor navigation, incorporating things like accelerometers, “invisible” landmarks, rapidly flickering lights, and magnetic fields. The experimental new NAVVIS system, however, utilizes a database of photographs. The technology is being developed by researchers at the Technical University of Munich. They started by wheeling a trolley down the corridors of their maze-like main campus. The data gathered by the scanners was used to create a continuous three-dimensional map of the corridors, which was overlaid on photos of the corresponding areas. Although the NAVVIS system is still in development, the researchers are already envisioning other uses for it. About the Author
Zephyros Anemos - JavaScript and WebGL Clojure - home ricardoescutia.com OpenWrt Interactive Plan FolioSWEEP - LINK your work and be found Smart Building Notes W3Techs - extensive and reliable web technology surveys FAQ: What's the difference between a gyro and an accelerometer? Do I need both? [Marc Ramsey gave a fantastically clear and concise answer to a question that's asked here every week, so I'm going to reprint it here with some slight edits as a FAQ that we can link to from the front page.] Q: What's the difference between a gyro and an accelerometer? Do I need both? An accelerometer measures acceleration. A 3-axis accelerometer will tell you the orientation of a stationary platform relative to earth's surface, once that platform starts moving, however, things get more complicated. A gyro measures rate of rotation around a particular axis. So, in a nutshell: Accelerometers are right in the long term but wrong (noisy) in the short term. But even that only works in for pitch and roll. GPS has a relatively slow update rate (1 to 10 Hz) and is subject to short term errors. Infra-red horizon sensing "copilots" are inexpensive and work fairly well as long as they have a clear view of the horizon.