メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.398572157858 44.1653011367176, 142.398086108414 44.1652359833056, 142.398465031307 44.164040400529, 142.398919304433 44.1641220464277, 142.398572157858 44.1653011367176)) ^^http://www.opengis.net/ont/geosparql#wktLiteral