发明名称 |
Systems and methods for a navigational device with forced layer switching based on memory constraints |
摘要 |
Systems, devices and methods are provided for more efficient use of RAM and other resources in connection with a route calculation algorithm which quickly obtains a best or reasonable best path between two locations. The navigational aid device includes forced layer switching capabilities. The navigational aid device includes a processor and a memory adapted to communicate with the processor. The memory has cartographic data including any number of locations and data indicative of thoroughfares of a plurality of types connecting certain ones of the locations. The plurality of thoroughfares are organized in a hierarchy of detail levels. The processor operates on a route calculation algorithm to find a path between any two of the number of locations and the route calculation algorithm dynamically forces switching between different levels in the hierarchy of detail levels based on a set of criteria.
|
申请公布号 |
US2005065718(A1) |
申请公布日期 |
2005.03.24 |
申请号 |
US20040993248 |
申请日期 |
2004.11.19 |
申请人 |
GARMIN LTD., A CAYMAN ISLANDS CORPORATION |
发明人 |
KAO MIN H.;CHILDS MICHAEL;BEESLEY DARIN J. |
分类号 |
G01C21/34;(IPC1-7):G01C21/30 |
主分类号 |
G01C21/34 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|