Method and system for obtaining road grade data
First Claim
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1. A method of collecting data for a geographic database that represents roads in a geographic region, the method comprising:
- with a vehicle that travels along the roads, using a barometer associated with the vehicle to collect data indicating altitudes as the vehicle travels along the roads;
analyzing said altitude data;
based on said analyzing, deriving road grade data along said roads; and
storing data in said geographic database that represent road grade.
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Abstract
A method for collecting data for a geographic database is disclosed. Altitude data are collected using a vehicle traveling in a geographic region. A barometer associated with the vehicle supplies the altitude data. Road grade data along the roads traveled by the vehicle is derived by analyzing the altitude data. The geographic database is updated to indicate the road grade.
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Citations
19 Claims
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1. A method of collecting data for a geographic database that represents roads in a geographic region, the method comprising:
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with a vehicle that travels along the roads, using a barometer associated with the vehicle to collect data indicating altitudes as the vehicle travels along the roads; analyzing said altitude data; based on said analyzing, deriving road grade data along said roads; and storing data in said geographic database that represent road grade. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of obtaining data for a geographic database using a vehicle moving on roads in a geographic region comprising:
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collecting data indicating atmospheric pressure and position of the vehicle as the vehicle travels on roads in the geographic region; analyzing the atmospheric pressure data and the position data to identify a section of constant road grade along the road traveled by the vehicle; and updating the geographic database to indicate the section of constant road grade. - View Dependent Claims (13, 14, 15, 16)
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17. A system for collecting data for a geographic database that represents roads in a geographic region comprising:
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a data collection unit located in a vehicle that travel along the roads in the geographic region; a barometer associated with the vehicle, said barometer providing altitude data to said data collection unit; a positioning system associated with the vehicle, said posing system providing position data to said data collection unit; and a data processing unit analyzing said altitude data and said position data, based on said analyzing, inferring road grade data along said roads. - View Dependent Claims (18, 19)
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Specification