メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.335455517133 43.1027730987742, 141.334863436729 43.1030168253199, 141.334520226493 43.1026231246896, 141.334143165618 43.1021633236946, 141.333925629542 43.1019091715473, 141.333808562372 43.1017722881531, 141.333518296915 43.1014330885062, 141.334055366954 43.1011962389837, 141.334082925117 43.1011825346422, 141.335455517133 43.1027730987742)) ^^http://www.opengis.net/ont/geosparql#wktLiteral