メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.95884050268 43.5456905038312, 144.959302053187 43.5459972931055, 144.958363267848 43.5467417239371, 144.957911988615 43.5464398553418, 144.958183210451 43.5462058411048, 144.95775038522 43.5459186889806, 144.958450171764 43.545428294443, 144.95884050268 43.5456905038312)) ^^http://www.opengis.net/ont/geosparql#wktLiteral