Patent ID: 8442557

Claim:
A method comprising: with at least one computing device: obtaining one or more signals representing expected signal data for one or more radio transmitters for a region of space within a structure, said expected signal data corresponding to a plurality of identifiable position points within said region of space; identifying at least one subset of said plurality of identifiable position points, said at least one subset comprising an anchor point and one or more non-anchor points; determining at least one function for mathematically and/or probabilistically relating said expected signal data for said anchor point to said expected signal data for said one or more non-anchor points within a portion of said region of space comprising said at least one subset of said plurality of identifiable position points; and generating one or more signals representing an encoded version of said expected signal data of said one or more radio transmitters for said region of space based, at least in part, on said at least one function.