Method and system for obtaining road grade data

Details Method and system for obtaining road grade data Method and system for obtaining road grade data

2005-01-25

2005-01-25

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S094000, C701S213000, C340S995180, C340S995240

Reexamination Certificate

active

06847887

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.

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