i have app displays maps. add feature user can tap location , have it display information nearest landmark.
by landmark, mean have set of predefined objects related app latitude/longitude coordinates.
the app able convert x/y screen coordinates latitude/longitude.
the app calculates distance between 2 latitude/longitude coordinates.
therefore, could, through brute force, run through list of landmarks , find closest.
however, knowing problem many applications have face, ask if there better technique find closest "landmark" latitude/longitude brute force? kind of transform?
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