メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.987733279311 34.8946412211633, 136.987828073024 34.8946525595678, 136.987912254309 34.8961409839594, 136.986467449993 34.8963386503756, 136.986497467859 34.8955605981873, 136.986537066823 34.8949103883804, 136.986526538574 34.8946576724763, 136.987733279311 34.8946412211633)) ^^http://www.opengis.net/ont/geosparql#wktLiteral