The visual variable similarity and drawing process reusability was analyzed in the process of point data symbolization. Then, a symbolic process model driven by visual variable similarity was proposed. Compared with the sequential symbolization process, the subprocess of symbolization could be shared in this model. For I/O-intensive symbol graphical construction process, graphic cache was proposed. For compute-intensive symbol graphical discretization process, scan line cache was proposed. For pixel-operation-intensive symbol rasterization process, raster cache was proposed. Under the precondition that drawing quality is ensured, the experimental results show that the method presented can significantly improve the symbolic efficiency for point datasets.
WU Mingguang
. A Visual Variable Similarity-driven Symbolization Process Model for Point Datasets[J]. Acta Geodaetica et Cartographica Sinica, 2014
, 43(12)
: 1274
-1279
.
DOI: 10.13485/j.cnki.11-2089.2014.0185
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