内部调用（对 ST_Point()）创建一个具有纬度-经度坐标（SRID = 1）的点几何值。
The inner call, to ST_Point(), creates a point geometry with latitude-longitude coordinates (SRID = 1).
这可从小时经度上测量，都是通过基本几何角度来确定趋势的变化。
These are measured in hours of longitude, which are basic geometric angles and determine the changes in trend.
应用推荐