The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2010
Filed:
Dec. 05, 2000
Rajashri Joshi, Schaumburg, IL (US);
Ole Henry Dorum, Chicago, IL (US);
Vijaya Israni, Hoffman Estates, IL (US);
Rajashri Joshi, Schaumburg, IL (US);
Ole Henry Dorum, Chicago, IL (US);
Vijaya Israni, Hoffman Estates, IL (US);
Navteq North America, LLC, Chicago, IL (US);
Abstract
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.