Method and system for obtaining road grade data
US6847887B1 · kind B1 · utility
62Cited by
16References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 2003 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Mar 4, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/096775
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method for collecting data for a geographic database is disclosed. Engine load value and position data are collected using a vehicle traveling in a geographic region. A location of a road grade change point is identified corresponding to a change in the engine load value data. The geographic database is updated to indicate the road grade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.