System and method for generating non-uniform grid points from calibration data

A method of assigning geographical coordinates to a grid point located in a geographic region for the location of a mobile device, comprising:

• (a) providing calibration data for each of one or more calibration points in the geographic region;
• and
• (b) for the calibration data associated with each of said calibration points:
• (i) evaluating the associated calibration data;
• (ii) determining if at least one grid point should be defined based on said evaluation;
• and
• (iii) assigning geographical coordinates to said at least one grid point.

A system for assigning geographical coordinates to a grid point located in a geographic region, comprising:

• a database;
• and
• a processor for receiving calibration data for each of one or more calibration points in said geographic region and for each of said calibration points said processor is programmed to:
• evaluate the associated calibration data;
• determine if at least one grid point should be defined based on said evaluation;
• assign geographical coordinates to said at least one grid point;
• and
• populate said database with said geographical coordinates.