Seamless vector map tiles across multiple zoom levels
US8937627B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2012 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Jul 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2370/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Rendering map tiles with style data for zoom levels other than the style data intended for that tile at its nominal zoom level can be used to avoid abrupt changes between map tiles. Particularly when changing zoom levels, use of styles from more than one level may create an uneven look. To address this, either the new data may be displayed with the style for the previous zoom level or the old data may be presented with the style for the new zoom level style until all tiles for the new zoom level are received. At that time, all the map tiles may be displayed using the style for the new zoom level along with the map data intended for that zoom level. Displaying map tiles at a first zoom level using a progression of styles from other zoom levels may also be used when creating a perspective view map.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.