Displaying the right offer in the right place

A challenge was to display offers in the right places based on the pre-defined areas of advertising (circular area or custom polygon) and business type. The advertiser can set the area where he wants his ad to be displayed as well as the type of businesses which can display his ad. At the same time the Displayer can select from which geographical area businesses can advertise as well as which business types can advertise. Offers are displayed only in the matching part of the pre-defined areas of the Advertiser and the Displayer.

What made the task even more challenging is the fact that each business can have several advertising and/or display places and advertising areas can be changed.