Method and system for representation of overlapping features in geographic databases
US6118404A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1998 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Jan 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/3667
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for storing and using data representing crossings of geographic features, and an associated product having the data embodied thereon, for use with a computer based navigation system, is disclosed. A computer-readable medium has computer-readable data embodied thereon that represents geographic features in a geographic region. The computer-readable data includes a plurality of data entities of a first type each of which represents a respective one of a plurality of linearly extending geographic features and a plurality of data entities of a second type each of which represents a respective crossing at which one of the linearly extending geographic features represented by one of the plurality of data entities of the first type crosses over another of the linearly extending geographic features represented by another of the plurality of data entities of the first type at a higher altitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.