Oct 28 2008

Glimpses of Berkurodam in Second Life for GIS Day

The 10th annual GIS day is arriving on 2008 11 19, and an article on the techniques that I’ve been blogging may be published on that day. In anticipation of that article, I’ve taken some time to upload selected strips of the Open Berkurodam model that has been built at 1:1.024 scale on 40 OpenSim simulator regions to Second Life. In that way, many more people may find this work and take a closer look.

In the article are three terms I’m suggesting be used for work that involves translation of GIS data into immersive 3D simulator environments: Level 1 build, Level 2 build, and Level 3 build. Level 1 is like Google Earth or MS Virtual Earth, basically bare earth gridded terrain with draped orthoimagery. Level 2 is what I’ve got as a placeholder in the Open Berkurodam 40-region 1:1-scale build, with a reflective LiDAR gridded surface draped with orthoimagery. Level 3 is just standard immersive 3D vector features that fill so much of Second Life, but in the special case of an immersive 3D build based on GIS-grade scaled mapping of building exteriors and possibly interiors.

The Level 3 build was what inspired my efforts starting back in October 2006 (Darb Dabney just has his second Rez-day celebration), but the Level 2 seems like the most important one for actual civic builds, because the grid of LiDAR data brings full-scale, full coverage data to hold the place and fill the mass of both buildings and trees, until one can afford to create the Level 3 build.

So now at the SIMGIS land in Stanford, there is both a Level 1 model (bare earth terrain with draped orthoimagery) of the entire 40-region sim at a reduced 1:42 scale, as well as a Level 2 model (gridded LiDAR first-return surface with draped orthoimagery) from the Berkeley BART station up Center Street, and on to the UC Berkeley Campus at Mulford Hall at a reduced 1:16 scale. It’s fun to see these tiny models, and it helps to convey some of the value that OpenSim offers those of us who would publish entire cities. A copy of these two models has also been placed in Amida, just across the channel from Gualala.

My selection of that path between BART and Mulford Hall was made to offer an entertaining Level 2 swath for those who would be taking transit to an ASPRS – BAAMA – GIF GIS Day event.

First the view in Second Life from Amida toward Gualala, with my Level 1 (1:42 scale), Level 2 (1:16 scale), and Level 3 (1:3 scale) (full immersive vector features with interiors) models of the downtown Berkkeley BART area. Second is the view of the SIMGIS Stanford site, with the same Level 1 (1/42-scale) and Level 2 (1/16-scale) builds.

Level 1 (1/42 scale) at base, Level 2 (1/16 scale) and Level 3 (1/3 scale) in distance

Level 1 (1/42 scale) at base, Level 2 (1/16 scale) and Level 3 (1/3 scale) in distanceAnd here's a view of the new SIMGIS Stanford region site, as viewed from Hawthorne region. The Level 1 model 1/42-scale is just above the water, and the Level 2 model 1/16-scale is above it.

Level 1 (1/42-scale) above water, and Level 2 (1/16-scale) above that.

Level 1 (1/42-scale) above water, and Level 2 (1/16-scale) above that.

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