LAND-BASED NAVIGATION USING ON-THE-FLY ELEVATION ASSESSMENTS
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Oct 18, 2012
app pub date -
Jun 15, 2010
filing date -
Sep 7, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Real time navigation assistance is provided on multi-level roadways using on-the-fly elevation determinations obtained by measuring the ambient air pressure. Absolute air pressure measurements adjusted to sea level (QNH) are obtained by on-the-fly wireless searches. A navigation device (10) calculates its current elevation above sea level as a function of the measured ambient actual pressure and a selected local QNH reading. This elevation is correlated to a digital map so that the navigation device (10) can be accurately located relative to a multi-level roadway. Elevation readings along any road segment (14) can be transmitted to a map update center for the purpose of updating and improving digital map data.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 6 Citation Count
- G01C Class
- 3.88 % this patent is cited more than
- 13 Age