メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.912992100525 35.1697122888033, 136.912962418478 35.1698865200759, 136.912848403241 35.1692917735197, 136.912903811072 35.1692907648392, 136.91455459863 35.1694025799887, 136.914534229286 35.1697127483064, 136.913866738547 35.1696766834192, 136.913855971622 35.1697645599857, 136.912992100525 35.1697122888033)) ^^http://www.opengis.net/ont/geosparql#wktLiteral