摘要：Partitions have been identified as a key concept for perception and understanding of space, and have been regarded as a primary tool for spatial analysis tasks in geographic applications. We discuss here some results regarding the exploration of geographic maps structured as nested partitions. In particular, we present a zooming model based on a Level-Of-Detail (LOD) approach, aimed at visualizing sequences of gradually simplified representations of a given area hierarchically structured in a poset. We first describe a set of basic zooming primitives defined as transitions betweens maps at different LOD, and study properties of the corresponding map space. We then introduce the notion of multiple zooming, define two new multiple zooming primitives on top of the basic ones, extend the map space, and prove some theoretical results on the new primitives
