空间参考系处理函数ST_Transform_云数据库 RDS(RDS)-阿里云帮助中心

将轨迹从一个空间参考系转换到另一个空间参考系。

语法

trajectory ST_Transform(trajectory traj, int srid);

参数

参数名称	描述
traj	需要转换的轨迹对象。
srid	目标空间参考系的SRID。

说明

原轨迹对象必须有SRID属性才能被转换到另一个空间参考系。

示例

select ST_Transform('{"trajectory":{"version":1,"type":"STPOINT","leafcount":4,"start_time":"2020-11-03 08:00:00","end_time":"2020-11-03 18:03:20","spatial":"SRID=4326;LINESTRING(114.49211 37.97999,114.49211 37.97521,114.49191 37.98021,124 37)","timeline":["2020-11-03 08:00:00","2020-11-03 08:01:40","2020-11-03 08:03:20","2020-11-03 18:03:20"]}}'::trajectory, 2401);
                                                                                                                                                                                     st_transform                                                                                                                                                                                      
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 {"trajectory":{"version":1,"type":"STPOINT","leafcount":4,"start_time":"2020-11-03 08:00:00","end_time":"2020-11-03 18:03:20","spatial":"SRID=2401;LINESTRING(29019418.8397 5025539.47515,29019696.5878 5024992.53808,29019387.9428 5025555.44863,29954166.377 5430882.06455)","timeline":["2020-11-03 08:00:00","2020-11-03 08:01:40","2020-11-03 08:03:20","2020-11-03 18:03:20"]}}
(1 row)