Indoor global positioning system

A computer readable storage medium that includes executable computer code embodied in a tangible form operable to determine a geo coordinate for an indoor location wherein the computer readable storage medium includes:

• executable computer code operable to receive and store information of a plurality of anchor points, wherein the information of each anchor point includes Global Positioning System (GPS) data of a particular location and radio frequency (RF) data that was obtained at a device at the particular location;
• and
• executable computer code operable to determine a first geo coordinate for a first indoor location based on a first RF data obtained at the first indoor location and the information of the plurality of the anchor points.