每种聚合类型对应一种数据结构图和ER模型。
Every aggregation type corresponds to a data structure diagram and an entity relationship model.
以非线性数据结构图为模型，设计了某市导游咨询程序，并给出了其核心函数的类C语言算法。
Having nonlinear graph of data structure as model, this paper designs one city's tour-guide inquiring program and gives C alike algorithm of main program and key function.
本文给出了无缝gis空间数据组织结构图，并详细列出了图块的点、线、面、复杂要素、DTM数据以及属性拼接表的数据结构。
In this paper spatial data organization structure chart of seamless GIS is advanced, the point, line, area, complex feature, DTM data and attribute merge table of block are discussed in detail.
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