メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.935785913312 42.9468705315081, 142.935596102492 42.9466885948025, 142.935115230165 42.9462590051636, 142.935070473518 42.9462202383857, 142.935095683703 42.9462057405611, 142.936223384438 42.9455495545711, 142.936755110976 42.946014985679, 142.936921094454 42.9461677353271, 142.936127601241 42.9466468023384, 142.935807867366 42.9468561223318, 142.935785913312 42.9468705315081)) ^^http://www.opengis.net/ont/geosparql#wktLiteral