发明名称 |
Method and system for representation of geographical features in a computer-based system |
摘要 |
Cartographic data is represented using polynomial splines. To improve representation accuracy and reduce storage requirements, a database storing data points (shape points and nodes) is converted into a database of spline control points. The spline control points are computed by fitting a polynomial spline to the geographic features using a least squares approximation. The control points associated with each geographic feature are stored in a computer-usable database. The geographic features can be displayed by computing the spline functions using the stored control points.
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申请公布号 |
US7805442(B1) |
申请公布日期 |
2010.09.28 |
申请号 |
US20000729939 |
申请日期 |
2000.12.05 |
申请人 |
NAVTEQ NORTH AMERICA, LLC |
发明人 |
JOSHI RAJASHRI;DORUM OLE HENRY;ISRANI VIJAYA |
分类号 |
G06F7/00 |
主分类号 |
G06F7/00 |
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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