Patent ID: 9377311
Filing Date: 2016-06-28
CPC Classification: C09B,G01C,G06F,G09B

Claim Text:
1. A computer-implemented method for assigning identifiers to geographic locations within digital map data, comprising: selecting a region within the map data; dividing the region into a first plurality of cells each uniquely addressable by an identifier of a first length; selecting a portion of the region; dividing the portion into a second plurality of cells each uniquely addressable by an identifier of a second length, wherein the second length is shorter than the first length identifier of the first length and an identifier of the second length; selecting a further portion of the region; dividing the further portion into a third plurality of cells each uniquely addressable by an identifier of a third length, wherein the length is shorter than the first length and second length, and wherein a geographic location within both the portion and further portion is uniquely identified by each of the identifiers of the first, second and third lengths; and generating and storing a context table comprising information identifying a location of the first, second and third plurality of cells and the indentifier for each cell.