メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.633220777071 35.3574598878611, 136.631862572049 35.3573731793272, 136.631911341209 35.3569186767592, 136.63327864542 35.3568884523773, 136.633220777071 35.3574598878611)) ^^http://www.opengis.net/ont/geosparql#wktLiteral