Three dimensional map generation based on crowdsourced positioning readings

An apparatus having a processor and memory, wherein said apparatus is connectable over a computer network to a plurality of mobile devices, wherein the processor being adapted to perform a method comprising:

• obtaining a plurality of positioning readings of the plurality of mobile devices, wherein each reading of the plurality of positioning readings is indicative of an altitude, latitude and longitude of a mobile device, wherein the each reading is determined using one or more sensors of the mobile device;
• clustering the plurality of positioning readings to determine clusters of positioning readings;
• for each cluster, computing an altitude value, based on an altitude of each positioning reading in the cluster, whereby determining an estimated altitude based on non-accurate altitude readings;
• and
• generating the three-dimensional map, wherein said generating is based on the plurality of positioning readings and the altitude value of each cluster.

A computer program product comprising a non-transitory computer readable storage medium retaining program instructions, which program instructions when read by a processor, cause the processor to perform a method comprising:

• obtaining a plurality of positioning readings of a plurality of mobile devices, wherein each reading of the plurality of positioning readings is indicative of an altitude, latitude and longitude of a mobile device, wherein the each reading is determined using one or more sensors of the mobile device;
• clustering the plurality of positioning readings to determine clusters of positioning readings;
• for each cluster, computing an altitude value, based on an altitude of each positioning reading in the cluster, whereby determining an estimated altitude based on non-accurate altitude readings;
• and
• generating the three-dimensional map, wherein said generating is based on the plurality of positioning readings and the altitude value of each cluster.