メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.039947454438 42.9094465720372, 143.04093739723 42.9095138807714, 143.040826056525 42.9102227609576, 143.040735592253 42.9102152966122, 143.039965026217 42.910162651203, 143.039855373704 42.9101548249589, 143.039142267249 42.9101059988367, 143.039234087082 42.909402952044, 143.039947454438 42.9094465720372)) ^^http://www.opengis.net/ont/geosparql#wktLiteral