Map symbols which represent the spatial information is the language of map units, also is the content of visual expression of the basic tools of geographic information.
地图符号是地图表达空间信息的语言单位，是可视化表达地理信息内容的基础工具。
Adopting the advantages of GIS technology, the engine provides visual expression of spatial information, and integration of attribute information with spatial information.
该引擎在借鉴GIS技术优点的基础上，实现了空间信息的直观表达及空间信息和属性信息的融合。
On the background of the information technology and the approaching era of graph reading, this paper mainly researches on the visual expression of teaching and communicating methods.
本研究以信息技术环境和读图时代的米临作为研究背景，对教学信息的可视化呈现和传达加以研究。
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