1. A method for representing viewability of a point of interest (POI) on a map, the method comprising: locating a set of viewing coverage information, wherein a subset of the set of viewing coverage information is associated with a point of observation on the map, wherein a viewing coverage information corresponds to a view of the POI from the point of observation, wherein the viewing coverage information comprises a viewing coverage fraction that represents a portion of the POI visible in the view; determining, in the subset of the viewing coverage information, a highest viewing coverage fraction and a lowest viewing coverage fraction to determine a range of values of the viewing coverage fraction, wherein the viewing coverage fraction of the POI is computed using the range of values; plotting the point of observation corresponding to the subset of the set of viewing coverage information such that the point of observation is represented on the map as a visually distinct area on the map and has a corresponding combined viewing coverage value; plotting a plurality of points of observation, the point of observation being a member of the plurality, each point of observation in the plurality having a corresponding combined viewing coverage value; and presenting a plot of the plurality of points of observation on the map as an overlay, wherein those points in the plurality whose corresponding combined viewing coverage values are within a tolerance value are coded similar to one another in the overlay.