メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.80708202871 35.2862128775045, 136.80674625571 35.2862265949907, 136.80636601642 35.2862739817814, 136.805712714255 35.2861016061642, 136.805825103079 35.2853449676302, 136.807314998903 35.2854788498601, 136.807159586704 35.2858266279565, 136.80708202871 35.2862128775045)) ^^http://www.opengis.net/ont/geosparql#wktLiteral