Accession Number:

ADA109366

Title:

Computer-Assisted Photo Interpretation Research at USAETL

Descriptive Note:

Corporate Author:

ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA

Personal Author(s):

Report Date:

1981-04-21

Pagination or Media Count:

14.0

Abstract:

A program in computer-assisted photo interpretation research CAPIR has been initiated at the U.S. Army Engineer Topographic Laboratories. In a new laboratory, a photo interpreter PI analyzing high-resolution, aerial photography interfaces directly to a digital computer and geographic information system GIS. A modified analytical plotter enables the PI to transmit encoded three-dimensional spatial data from the stereomodel to the computer. Computer- generated graphics are displayed in the stereomodel for direct feedback of digital spatial data to the PI. Initial CAPIR capabilities include point positioning, mensuration, stereoscopic area search, GIS creation and playback, and elevation data extraction. New capabilities under development include stereographic superposition, a digital image workstation, and integration of panoramic Optical Bar Camera photography as a primary GIS data source. This project has been conceived as an evolutionary approach to the digital cartographic feature extraction problem. As a working feature extraction system, the CAPIR laboratory can serve as a testbed for new concepts emerging from image understanding and knowledge-based systems research. Author

Subject Categories:

  • Geodesy
  • Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE