Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1998-01-21
2000-09-12
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
701208, 340990, H04B 7185, G01S 502
Patent
active
061184047
ABSTRACT:
A system and method for storing and using data representing crossings of geographic features, and an associated product having the data embodied thereon, for use with a computer based navigation system, is disclosed. A computer-readable medium has computer-readable data embodied thereon that represents geographic features in a geographic region. The computer-readable data includes a plurality of data entities of a first type each of which represents a respective one of a plurality of linearly extending geographic features and a plurality of data entities of a second type each of which represents a respective crossing at which one of the linearly extending geographic features represented by one of the plurality of data entities of the first type crosses over another of the linearly extending geographic features represented by another of the plurality of data entities of the first type at a higher altitude.
REFERENCES:
patent: 5285391 (1994-02-01), Smith, Jr. et al.
Fernekes Robert P.
Israni Vijaya
Nyczak Gregory M.
Yates Robert
Blum Theodore M.
Kaplan Lawrence M.
Kozak Frank J.
Navigation Technologies Corporation
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