drawing zone meaning in English

拉伸区

So it can better isoline draw process for analyzing mineralization result and groundwater hydrochemistry law of anion , cation distribution , it can also design and carry out superposing analysis function and use superposing method draw zone figure of hydrochemistry type . moreover , the system of secondary development has function that stores ultimate figure result into spatial database , it is not steady but flexible at any moment , it can so discretionarily superpose together with other figure layers that it forms synthesis figure set of multi - layer superposing and complicated content for the zone supplying accessorial support
该系统在完成了基本数据管理、图形显示及查询功能之外，还实现了等值线生成功能，大大简化了过去为分析矿化度、阴、阳离子分布等水化学规律而作的等值线绘制工作；该系统还设计实现了叠置分析功能，用于在等值线绘制功能的基础上，通过叠置分析的方法绘制出水化学类型分区图。