| CPC G01S 5/02525 (2020.05) [G01S 5/02529 (2020.05)] | 14 Claims |

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1. A method comprising:
obtaining, by a network apparatus, a respective identifier communication from a respective mobile apparatus;
extracting, by the network apparatus, a respective network interface identifier from the respective identifier communication;
updating or generating, by the network apparatus, a repository of mobile apparatus identifiers based on the respective network interface identifier;
at least one of (a) filtering, by the network apparatus, observation data comprising one or more network interface identifiers based on the repository of mobile apparatus identifiers or (b) providing, by the network apparatus, the repository of mobile apparatus identifiers for use in filtering the observation data comprising one or more network interface identifiers; and
updating a map based on filtered observations generated by filtering the observation data, wherein the map is a radio map comprising a plurality of access point models and the filtered observations include observation data corresponding to one or more fixed location access points.
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