Efficient composition and rendering of graphical elements
US9424673B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2014 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Aug 31, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2210/08
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A map server generates a set of base map tiles having vector descriptors, each indicating a geometry of a respective map element, in accordance with a non-raster format for rendering a first map image. The map server provides the base map tiles to the client device. Upon receiving an indication that a specific map image for the selected geographic region is to be rendered at the client device, the map server generates a set of difference map tiles that indicate changes to be made to the set of base map tiles and sends the difference map tiles to the client device for use, along with the set of base map tiles, in rendering the requested specific map image. The client device renders the new map view defined by the difference map tiles without needing to again pre-process all of the features or elements defined in the base map tiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.