メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.797794274817 35.4439800133199, 136.796981947995 35.4439299140719, 136.796376244014 35.4438411840563, 136.796472311828 35.4430540009505, 136.797867378689 35.4432064574254, 136.797794274817 35.4439800133199)) ^^http://www.opengis.net/ont/geosparql#wktLiteral