Method for calculating distance using piece-wise linear interpolation
US6571195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Jul 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for calculating a distance between a first point and a second point using linear interpolation is provided. The first point and the second point are located between a first latitude and a second latitude. An interpolated prime vertical radius of curvature value for a point between the first point and the second point is calculated based on a first prime vertical radius of curvature value for the first latitude and a second prime vertical radius of curvature value for the second latitude. An interpolated meridian radius of curvature value for the point between the first point and the second point is calculated based on a first meridian radius of curvature value for the first latitude and a second meridian radius of curvature value for the second latitude. An interpolated cosine value for the point between the first point and the second point is calculated based on a value representing a cosine of the first latitude and a value representing a cosine of the second latitude. The distance between the first point and the second point is then calculated based on the interpolated prime vertical radius of curvature value, the interpolated meridian radius of curvature value, and the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.