メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.78263036237 35.4119885253507, 136.779251946642 35.4121141683709, 136.779121693472 35.4116952842785, 136.781487226582 35.4116130912448, 136.781503720157 35.4118169381385, 136.782618287384 35.4117775807489, 136.78263036237 35.4119885253507)) ^^http://www.opengis.net/ont/geosparql#wktLiteral