メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.364540764169 43.1039746454934, 141.365479494814 43.1041114342258, 141.365289713562 43.1048517638071, 141.36485383229 43.1047938254345, 141.364361499933 43.1047303154997, 141.36388168705 43.1046638756711, 141.364069685123 43.1039086960255, 141.364540764169 43.1039746454934)) ^^http://www.opengis.net/ont/geosparql#wktLiteral