Here, one of those sites, the Oahu Defense Area in Hawaii, is shown in 1968. His plan is to build a geo-referenced database so that anyone can research the Nike missile sites through Google Earth. Those missiles became obsolete with the advent of long-range intercontinental ballistic missiles (ICBMs).ĭavid Tewksbury, a GIS (geographic information system) specialist at Hamilton College in New York, aimed to preserve a visual record of the abandoned Nike missile launch sites before they vanish - either as a result of being reclaimed by nature, repurposed by the military or redeveloped. Some of those missiles even carried nuclear warheads. Nike missiles, which were supersonic surface-to-air missiles, sat ready to launch at nearly 300 sites across the United States during a period of the Cold War, from 1954 to the 1970s. You will be able to work with your building in the 2D and 3D modes and switch back to terrain editing any time under the Object Properties tab of the Inspector, or by clicking the layers button in the bottom left corner of the 2D view on iPhone and iPad.This Google Earth image shows the Oahu Defense Area in Hawaii, which was equipped with missiles in open air with earthen revetments, or embankments, between paired launch sites, shown here in 1968. Please note that all operations with elevations are performed in the 2D mode only. swimming pools, while the Pit Poly tool is used for creating more advanced shapes. The Pit Rect tool is great for creating rectangular pits, e.g. The negative numbers entered into the Elevation Point field create the lowest underground point. Mark the top point with the help of the Elevation Point and underground parts using the Pit Rect and Pit Poly tools. More information on working with the elevation lines and splines: for Mac, for iPhone/ iPad, and for Windows. For straight lines, use the Elevation Line tool, while the Elevation Spline tool resembles a freehand tool in graphics software and creates a curved line. Repeat the terrain elevations using the “Elevation Line” or “Elevation Spline” tools.

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