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:
May. 13, 2003
Filed:
Mar. 30, 2000
Xiaoyi Wu, Fremont, CA (US);
W. Clayton Collier, San Ramon, CA (US);
Rajiv K. Synghal, Concord, CA (US);
James Whitaker, Livermore, CA (US);
Kivera, Inc., Oakland, CA (US);
Abstract
A method and apparatus for combining two dissimilar road map databases of a given geographic region are provided. The road map database differ in degree of coverage or accuracy of coverage, or both, of the geographic region. Each database includes data defining a plurality of roads. A first set of loops is defined from roads represented in a first of the two road map databases. For each of the first set of loops, a corresponding loop is identified from roads represented in a second of the two road map databases, to define a second set of loops. Each loop of the second set of loops may include one or more links, and each link represents a portion of a road represented in the second road map database. A set of output loops corresponding to the first set of loops is generated to form an output road map database. Links enclosed within loops of the second set of loops and not represented in the first road map database are then copied into the set of output loops, such that the output road map database represents a combination of the first road map database and the second road map database.