发明名称 |
Vehicle map position determining apparatus |
摘要 |
A vehicle navigation/position system (10) investigates road segments having start and end coordinates stored in a road map data memory (13). The system determines what road segments have at least a portion inside a rectangle of interest (ROI-100) about an estimated vehicle position (101). Map matching then corrects vehicle position by locating vehicle position on one of the road segments inside the rectangle of interest. Vehicle location/navigation information is then provided. A computer (11) identifies road segments as inside the rectangle of interest (100) by creating electrical signals associated with each road segment start/end coordinate as compared to boundary coordinates of the rectangle. These electrical signals identify the road segment coordinates with respect to areas (B-I) surrounding the rectangle of interest (A). For road segments extending between opposite middle side areas (B-I, C-G), the computer (11) determines the road segment inside the rectangle of interest, and the road segment is added to a list.
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申请公布号 |
US5270937(A) |
申请公布日期 |
1993.12.14 |
申请号 |
US19910691872 |
申请日期 |
1991.04.26 |
申请人 |
MOTOROLA, INC. |
发明人 |
LINK, LAURA J.;SPENCER, MARY F. |
分类号 |
G01C21/30;(IPC1-7):G06F15/50 |
主分类号 |
G01C21/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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