メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.785083391312 35.4119241148082, 136.78263036237 35.4119885253507, 136.782618287384 35.4117775807489, 136.782603993292 35.4115630371602, 136.785055716163 35.4114809823297, 136.785069113152 35.4116957343349, 136.785083391312 35.4119241148082)) ^^http://www.opengis.net/ont/geosparql#wktLiteral