Istituto di Scienza e Tecnologie dell'Informazione     
Cignoni P., Puppo E., Scopigno R. Representation and Visualization of Terrain Surfaces at Variable Resolution. Technical report, 1996.
We present a new approach for managing the representation of discrete topographic surfaces at variable resolution, which is based on a unified model encoding a history of either refinement or simplification of a triangulation decomposing a plane domain. An efficient data structure is pro-posed, which is obtained by interpreting the model containing all triangles of the history as a cell complex embedded in three-dimensional space. A major feature of the model is the ability to pro-vide efficiently a representation of the surface at resolution variable over the domain, according to an application-dependent threshold function. Experimental results on real world data are pre-sented, and applications to flight simulation are discussed.
Subject Digital terrain modeling
Surface simplification
Variable resolution representation
Terrain visualization

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