メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.147948028121 35.0509660810858, 137.148452602962 35.0509939261118, 137.149513661586 35.0510566625083, 137.149467693133 35.051433933889, 137.14839183839 35.0525564891506, 137.147971110495 35.0522804730449, 137.147664214281 35.0521385727994, 137.147453222818 35.0520528913125, 137.146772286858 35.0517519599465, 137.147070423406 35.0510442933713, 137.147430162914 35.0510086579217, 137.147948028121 35.0509660810858)) ^^http://www.opengis.net/ont/geosparql#wktLiteral