to_polygon
parse a WKT (text) representation of a polygon into a polygon value Examples: to_polygon('POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10))') -- Result: {"type":"Polygon","coordinates":[[[30,10],[40,40],[20,40],[10,20],[30,10]]]} to_polygon(`a_wkt_polygon`) -- Result: {"type":"Polygon","coordinates":[[[30,10],[40,40],[20,40],[10,20],[30,10]]]}
text -> polygon polygon -> polygon