本文简要介绍SQL/DS的特性、功能、数据结构及其应用。
This paper briefly introduces its features, functions, data structures and applications.
弄清楚hdf - EOS数据结构和内容及其基本物理量的计算方法是MODIS应用的基础。
It is essential to understand the structure and content of HDF-EOS data, as well as the calculation method of physical quantities, for applications of MODIS.
文中重点介绍了地图数据库的内容和数据结构，着重研究了地图数据库的建立及其应用。
In this paper, content and structure of map database were introduced, and its foundation and application were also studied particularly.
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