Real-time spherical correction of map data
US8300984B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2010 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Dec 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/145
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of displaying a map on a wireless communications device includes steps of obtaining map data for rendering the map to be displayed on the wireless communications device, generating corrected map data by applying a spherical correction factor to the obtained map data, and rendering the corrected map data to display the map on a display of the wireless communications device. The spherical correction factor corrects for map distortions that occur at northerly (or southerly) latitudes. Since the spherical correction factor is a simple correction to a 3×3 transformation matrix, this spherical correction can be easily applied without taxing the CPU limitations of small handheld devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.