Real time three dimensional geo-referenced digital orthophotograph-based positioning, navigation, collision avoidance and decision support system
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United States of America Patent
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-
Jan 10, 1995
Issued Date -
N/A
app pub date -
Nov 18, 1993
filing date -
Jun 21, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Herein is presented a positioning, navigation and collision avoidance system for ships, aircraft, land vehicles and the like, which utilizes a geo-referenced digital orthophotograph data-base and a positioning signal to display upon a computer stereo graphics device a high visibility dynamic photographic image of the user's immediate environment, including both moving and stationary obstacles. The position and temporal data along with the geo-referenced elevation data utilized to derive the digital orthophotograph(s) can serve to warn the user of nearby obstacles; and optionally, to implement semi-automatic avoidance. Substituting user generated x-y-z positions and times, the system may be used in a static mode as a flight simulator or a simulator for other modes of transportation. The system may also be used as a mobile Geographic Information Systems decision making tool with the addition of user supplied geo-referenced digital data layers.
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