Terrain Analysis Database Generation through Computer-Assisted Photo Interpretation,
ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA
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The creation of digital terrain analysis databases through on-line photo interpretation has been the focus of computer-assisted photo interpretation research CAPIR at USAETL. An APPS IV analytical plotter equipped with stereo superposition linked to a minicomputer is used for photo interpretation and digitizing. Digital data is input in arcnode format with attributes and the points are stored in three dimensions latitude, longitude, and elevation. To demonstrate these capabilities, high-altitude infrared photography of the Fort Belvoir, Virginia, area was used for photo interpretation and digitization, supplemented by large-scale photography and field data. Landforms, surface drainage, soils, and vegetation were individually interpreted and digitized. Digital elevations, measured from stereo imagery, were used to produce contour and slope overlays. The resultant digital database was readily accessed and used as a basis for analysis and modeling. This paper briefly describes the hardware, software and methods used to generate a digital terrain analysis database.
- Cartography and Aerial Photography
- Computer Hardware