メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.932665293341 35.0896039333416, 136.932407998133 35.0901007250976, 136.932183978673 35.0900201451866, 136.932055950029 35.0899746126414, 136.932626014391 35.0888980311981, 136.932982935825 35.0890189397352, 136.932981852848 35.0890309101281, 136.932665293341 35.0896039333416)) ^^http://www.opengis.net/ont/geosparql#wktLiteral