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:
Jun. 03, 2014
Filed:
Aug. 26, 2011
Applicants:
Hanan Samet, College Park, MD (US);
Jagan Sankaranarayanan, Santa Clara, CA (US);
Inventors:
Hanan Samet, College Park, MD (US);
Jagan Sankaranarayanan, Santa Clara, CA (US);
Assignee:
University of Maryland, College Park, College Park, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 21/00 (2006.01); G01C 21/34 (2006.01); G01C 21/26 (2006.01); G06F 17/30 (2006.01);
U.S. Cl.
CPC ...
G01C 21/3446 (2013.01); G01C 21/26 (2013.01); G06F 17/30241 (2013.01); G01C 21/00 (2013.01);
Abstract
One embodiment of the invention is directed to a method including constructing a path-distance oracle that provides both an intermediate vertex of a shortest path between two vertices in a spatial network and an approximate distance between the two vertices. The constructing comprises decomposing the spatial network into a set of path-coherent pairs (PCPs) that satisfy at least one predefined property.