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Natural Bridge
Natural Bridge, located in the historic Shenandoah Valley, is one of the most recognized and visited geologic landmarks in the country. The massive 90-foot-wide arch spans Cedar Creek, which runs 200 feet below. Legend says that George Washington, as a young land surveyor, carved his initials on its wall. In 1774, King George III granted ownership to Thomas Jefferson. Natural Bridge was often regarded as the Eighth Natural Wonder of the World during the 19th and 20th centuries. The site became a popular venue for events, ranging from conventions to the annual Easter Sunrise Service. Hotels, inns, and cottages were built to accommodate travelers, and on-site attractionsincluding a show cave, a wax museum, and a Monacan Indian villagebroadened visitor appeal. Natural Bridge remained privately owned until 2014, when the title was transferred, allowing it to become a state park; the bridge will now truly belong to the people, a concept that would have made Jefferson proud. -- Amazon.com.
AFHRL-TR.
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Study of Data Sources and Processing for Radar Land Mass Simulation
To generate input data with a 50-foot resolution and fifteen shades of gray for advanced high-resolution digital radar simulators, this research examined and defined data sources and processing techniques. Limited to the Continental United States and to unclassified information, the data sources included all known aerial mapping imagery and topographic maps. All existing image processing techniques and devices were examined to define their operating principles. This review led to the conclusion that adequate geometric information for radar simulation data could be extracted from the current data sources and that existing processing capabilities could be combined into a feasible automatic system. In related work, non-parametric three-dimensional resections were calculated on a digital computer, and mathematical concepts were developed to give a computer system the capability of interpreting the physical characteristics in photos by using cues as done by a trained photo interpreter. (Author).
Aerospace
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