这个会动的线段主要有两个部分：一是线段(LineString)的地标，首先需先加个id，如 LineString id=”KaohsiungL”> ，然后大家有没发现这条线段的两端点均设为同一点(高雄港端)，所以...
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linestring list 弧段链表
Given that geocoding is a much more complex functionality than simply constructing a linestring, the performance impact is much more noticeable.
如果地理编码不仅仅是构造一个linestring，而是执行更复杂的功能，那么对性能的影响将会更加显著。
In another scenario, it could be counter-productive to generate the linestring for each and every row with which the spatial overlap test shall be performed.
在另一种场景中，为将进行空间重叠测试的每一行生成linestring又可能产生完全不同的结果。
For example, you can determine distances between two geometries, perform spatial set operations like unioning or intersecting geometries, and retrieving the length of a linestring.
例如，可以确定两个图形之间的距离，执行空间集合操作，如合并或交叉图形，获取一个 linestring 的长度。
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