A consistent hierarchical representation for vector data
SIGGRAPH '86 Proceedings of the 13th annual conference on Computer graphics and interactive techniques
Strip trees: a hierarchical representation for curves
Communications of the ACM
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With the rapid development of remote sensing technology, the integration of raster data and vector data becomes more and more important. Raster data models are used in tessellation spaces and vector data models are used in discrete spaces respectively. The relationships between tessellation space and discrete space have to be established for integrated data models. The minimum cells where both raster and vector data could be processed have to be defined. As it is very easy to establish relationships between vector points and corresponding raster cells, we defined those raster cells as Code-Points, the minimum cells where both raster and vector data could be processed. All vector elements such as lines, faces and bodies are composed directly or indirectly of Code-Points. This can be done by using interpolation algorithms to Code-Points in real-time. We have developed an integrated data model based on above procedures. In addition, we have developed a geometric primitive library for 3- Dimensional objects in order to improve the processing speed. This library could be hardware realized as a graphic accelerator card. If the conversion beiween vector and raster could be done in real time, ihe integraied data model could be used for operational integration of remote sensing and GIS.