メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.222556433196 34.8403940330237, 138.222338513366 34.8404732685482, 138.221991693433 34.8405323528251, 138.221580511218 34.8405513565595, 138.221419321677 34.8405443012456, 138.221428380151 34.8403566278247, 138.221457923677 34.8403538071468, 138.221800818317 34.8402877443359, 138.222213436542 34.8402017646961, 138.222472474194 34.8401519899147, 138.222480808672 34.8401501777198, 138.222516399208 34.8403141464899, 138.222556433196 34.8403940330237)) ^^http://www.opengis.net/ont/geosparql#wktLiteral