Systems and methods to identify a predefined geographical region in which a mobile device is located

A method implemented in a computing device, the method comprising:

• storing, in the computing device, an identifier of a geographical region having a predefined geographical boundary;
• storing, in the computing device, a set of cell identifiers, each of the cell identifiers identifying a cell that is determined to be within the predefined geographical boundary;
• storing data mapping each cell identify in the set of cell identifiers to at least one region identifier;
• receiving, from a mobile device, a location of the mobile device;
• converting, by the computing device, a set of coordinates of the location of the mobile device to a first cell identifier;
• determining, by the computing device, whether or not the location of the mobile device is within the geographical region based on searching the set of cell identifiers to determine whether or not the set has the first cell identifier;
• and
• searching the set of cell identifiers to determine at least one region identifier associated with the first cell identifier.

A method implemented in a computing device, the method comprising:

• storing, in the computing device, an identifier of a geographical region having a predefined geographical boundary;
• storing, in the computing device, a set of cell identifiers, each of the cell identifiers identifying a cell that is determined to be within the predefined geographical boundary;
• receiving, from a mobile device, a location of the mobile device;
• converting, by the computing device, a set of coordinates of the location of the mobile device to a first cell identifier;
• wherein the set of coordinates includes longitude and latitude of the location;
• and the converting includes:
• selecting digits from the longitude and the latitude of the location in accordance with a cell resolution level;
• and
• combining the digits selected from the longitude and the latitude of the location into an integer representing the first cell identifier;
• and
• determining, by the computing device, whether or not the location of the mobile device is within the geographical region based on searching the set of cell identifiers to determine whether or not the set has the first cell identifier.

A method implemented in a computing device, the method comprising:

• storing, in the computing device, an identifier of a geographical region having a predefined geographical boundary;
• storing, in the computing device, a set of cell identifiers, each of the cell identifiers identifying a cell that is determined to be within the predefined geographical boundary;
• receiving, from a mobile device, a location of the mobile device;
• converting, by the computing device, a set of coordinates of the location of the mobile device to a first cell identifier;
• determining, by the computing device, whether or not the location of the mobile device is within the geographical region based on searching the set of cell identifiers to determine whether or not the set has the first cell identifier;
• receiving data representing the predefined geographical boundary of the geographical region;
• and
• identifying, in a hierarchy of cell grids, the set of cell identifiers that are determined to be within the predefined geographical boundary.