3 November 2010 Progressive simplification and transmission of building polygons based on triangle meshes
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Digital earth is a virtual representation of our planet and a data integration platform which aims at harnessing multisource, multi-resolution, multi-format spatial data. This paper introduces a research framework integrating progressive cartographic generalization and transmission of vector data. The progressive cartographic generalization provides multiple resolution data from coarse to fine as key scales and increments between them which is not available in traditional generalization framework. Based on the progressive simplification algorithm, the building polygons are triangulated into meshes and encoded according to the simplification sequence of two basic operations, edge collapse and vertex split. The map data at key scales and encoded increments between them are stored in a multi-resolution file. As the client submits requests to the server, the coarsest map is transmitted first and then the increments. After data decoding and mesh refinement the building polygons with more details will be visualized. Progressive generalization and transmission of building polygons is demonstrated in the paper.
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Hongsheng Li, Hongsheng Li, Yingjie Wang, Yingjie Wang, Qingsheng Guo, Qingsheng Guo, Jiafu Han, Jiafu Han, } "Progressive simplification and transmission of building polygons based on triangle meshes", Proc. SPIE 7840, Sixth International Symposium on Digital Earth: Models, Algorithms, and Virtual Reality, 784015 (3 November 2010); doi: 10.1117/12.872704; https://doi.org/10.1117/12.872704

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