| 摘要 |
Provided is a mapping application that displays detailed data information as a function of multiple sets of layered data. When portions of at least t wo sets of layered data overlap, a set operation is applied to the overlappi ng portions to create a new set of layered data. The set operation allows th e sets of layered data to be modified utilizing a simple function, such as b y dragging and dropping a set of layered data to a different portion of the map area. When the portions no longer overlap, the set operation is removed, rendering the sets of layered data in their original format.
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