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ST_Circle

description

Syntax

GEOMETRY ST_Circle(DOUBLE center_lng, DOUBLE center_lat, DOUBLE radius)

将一个WKT(Well Known Text)转化为地球球面上的一个圆。其中center_lng表示的圆心的经度, center_lat表示的是圆心的纬度,radius表示的是圆的半径,单位是米

example

mysql> SELECT ST_AsText(ST_Circle(111, 64, 10000));
+--------------------------------------------+
| st_astext(st_circle(111.0, 64.0, 10000.0)) |
+--------------------------------------------+
| CIRCLE ((111 64), 10000)                   |
+--------------------------------------------+

##keyword ST_CIRCLE,ST,CIRCLE