メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.270620717704 43.1065342247523, 141.269499640054 43.1055681714878, 141.268874941651 43.1050525916355, 141.269672158979 43.1045594506279, 141.271495700272 43.1034314977601, 141.272161119783 43.1040239319292, 141.273011255094 43.1047893995213, 141.273067946651 43.1048398868332, 141.273089050856 43.1048587740223, 141.270620717704 43.1065342247523)) ^^http://www.opengis.net/ont/geosparql#wktLiteral