Various embodiments are described herein for improving relevancy and accuracy of assistance data (AD) generation from a set of floor plan map data based on contextualizing parameters in the set of floor plan map data to other related floor plan maps. The relevancy and accuracy of assistance data derived from a floor plan map may be improved by contextualizing or matching the floor plan map to other related floor plan maps where associated assistance data is already recorded. In some embodiments, floor plan maps may be identified which are closely related to the new floor plan map to be analyzed, and then the measurements of the closely related floor plan map as assistance data for the new floor plan map may be reused. In some embodiments, a relationship tree graph may be used to organize the floor plan maps into a logical relationship between each other.