メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.363043617219 34.9323573083357, 138.362448538311 34.9323773454624, 138.362477417303 34.9323406852246, 138.36195132822 34.9321330334286, 138.361911670327 34.9315668193891, 138.362686178949 34.9311999195934, 138.362778268925 34.9311796696073, 138.362929835566 34.931146315777, 138.363043617219 34.9323573083357)) ^^http://www.opengis.net/ont/geosparql#wktLiteral