In project, which is the explanation of geological information system, isoline map is a basic graphics show function the main task is accomplishing this function.

在项目地质资料解释系统中，等值线图是其一项基本功能，本文的主要任务既是实现这一功能。

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How to develop a reusable basic vector graphics of oil drilling domain is a crucial problem, which can save development costs, short development cycles and increase system efficiency.

如何开发出可以复用的石油钻探领域基础矢量图形构件、节约开发成本、缩短开发周期、提高系统效率是本文着重解决的问题。

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