Highlight areas of a map where clues come from, then search the area of overlap for your quarry
Trying to locate a fugitive, a kidnapped captive, or a hidden villain's lair in a Police Procedural or action flick? If there's no obvious address among the available clues, there's always process-of-elimination to fall back upon: if you can pinpoint what region of the city/county/whatever the other clues must've come from, then highlight them in bright primary colors on a map, there's sure to be just one area where all those clues' possible origin-points overlap. Congratulations, you just found your perp/crime scene/abducted Love Interest, while looking properly-clever for the audience. The actual nature of the clues may vary considerably, from ambient urban sounds in the background of a ransom-demand phone call to the distribution of wildflowers and soils in a thousand-acre forest. In some cases, the Venn Diagram technique will pinpoint the exact spot sought; in others, it'll narrow down the search-area substantially, and a little on-scene deduction will finish off the job (e.g. noting which abandoned building a perp could enter and leave without being observed). A Truth in Television trope, as many Real Life manhunts do come down to such a geographic process of elimination. Displaying this process may involve use of The Big Board or String Theory.