Navigation Technologies Corporation

Navteq North America, LLC

Here Global B.v.

John M Jaugilas

David S Lampert

Richard A Ashby

Robert P Fernekes

Roy Casino

Vijaya S Israni

Matthew Friederich

Richard J Weiland

Srinivasa Doddapaneni

Stephan V Bechtolsheim

Shiva Kalisetty

James A Meek

Senthil K Natesan

Alex Nash

Paul Crowley

Matthew Friedrich

A navigable map database, stored on a computer-readable medium and used with a navigation application program, includes data which are spatially parcelized into a plurality of parcels. Associated with each of the plurality of parcels is a first index which associates the area represented by the data in the parcel with a plurality of sub-areas formed of the area. Also associated with each of the parcels is a second index associating each of the data in the parcel with at least one of the sub-areas. Further disclosed is a method for producing a navigable map database which is parcelized into a plurality of parcels, wherein each of the plurality of parcels includes a first index which associates the area represented by the data in the parcel with a plurality of sub-areas formed of the area and a second index associating each of the data in the parcel with at least one of the sub-areas. Also further disclosed are a program and method for finding data in one or more parcels that match a spatial search criterion using a navigable map database that is parcelized into a plurality of parcels, wherein each of the plurality of parcels includes a first index which associates the area represented by the data in the parcel with a plurality of sub-areas formed of the area and a second index associating each of the data in the parcel with at least one of the sub-areas. The program and method use the first and second indices to identify which of the data in at least one of the plurality of parcels satisfy the spatial search criterion.

Parcelized geographic data medium with internal spatial indices and method and system for use and formation thereof

A system and method are disclosed that allow a navigation system that uses a geographic database to also use the data in traffic messages broadcast by a traffic broadcast system. One aspect of a present system and method includes the formation, storage, and use of location reference data records in a geographic database used by a navigation system. These location reference data records identify certain other kinds of data records that represent physical geographic features, such as data records that represent segments of roads, as being associated with certain location reference numbers. These location reference records may be included in a geographic database installed in the vehicle or may be provided to vehicles via a wireless communication link. Another aspect of a present system and method includes the formation, storage, and use of one or more indices that relate location reference numbers used by a traffic broadcast system to location reference records in a geographic database used by the navigation system. Another aspect of a present system and method is the formation, storage, and use of data that identify, for each location reference number, the immediately previous and the immediately next location reference number. Still another aspect of a present system and method includes the programming, and methods of use thereof, that query the geographic database and return the data entities associated with certain identified location reference numbers.

Method and system for using real-time traffic broadcasts with navigation systems

A system and method are disclosed that provide an end user of a navigation program with information about walking to a desired destination in combination with information about driving to or close to the desired destination. In addition to the calculation of a route for driving to the desired destination, the navigation program uses data in a geographic database to calculate one or more routes to reach the desired destination by walking from locations within a walking threshold around the desired destination. In calculating these one or more walking routes, the navigation program uses the data in the geographic database to assess the suitability of roads around the desired destination for pedestrian travel. In calculating these one or more walking routes, the navigation program can also include road segments in the walking routes without regard for travel restrictions that only apply to vehicular traffic. Additionally, if the navigation program is installed in a vehicle, the navigation program may indicate the walking distance to the desired destination along one of the calculated walking routes as the vehicle approaches the desired destination. Additionally, the navigation program may provide the end user with walking directions to walk to the desired destination along one of the calculated walking routes.

Method and system for providing walking instructions with route guidance in a navigation program

A system and method are that provide an end user of a navigation program with information about walking to a desired destination in combination with information about driving to or close to the desired destination. In addition to the calculation of a route for driving to the desired destination, the navigation program uses data in a geographic database to calculate one or more routes to reach the desired destination by walking from locations within a walking threshold around the desired destination. In calculating these one or more walking routes, the navigation program uses the data in the geographic database to assess the suitability of roads around the desired destination for pedestrian travel. In calculating these one or more walking routes, the navigation program can also include road segments in the walking routes without regard for travel restrictions that only apply to vehicular traffic. Additionally, if the navigation program is installed in a vehicle, the navigation program may indicate the walking distance to the desired destination along one of the calculated walking routes as the vehicle approaches the desired destination. Additionally, the navigation program may provide the end user with walking directions to walk to the desired destination along one of the calculated walking routes.

A method and system for managing memory resources in a system used in conjunction with a navigation application program that accesses geographic data. The geographic data are comprised of a plurality of data records. The plurality of data records are organized into parcels, each of which contains a portion of the plurality of data records, such that the data records in each portion of the plurality of data records that forms each parcel are accessed together. One or more buffers each that forms a contiguous portion of the memory of the navigation system is provided as a cache to store a plurality of parcels. One or more data structures located outside the contiguous portion of memory identify the parcels of data stored in the cache and the locations in the cache at which the parcels are stored. The one or more data structures located outside the contiguous portion of memory in which the parcels are cached are used to manage the parcel cache to use it efficiently. These one or more data structures located outside the contiguous memory in which the parcels are cached are also used to defragment the parcel cache.

Memory management for navigation system

Growing community of inventors

Lombard, IL, United States of America

John M Jaugilas