メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.399124836789 44.1658288542635, 142.398456373636 44.165732384877, 142.398572157858 44.1653011367176, 142.398919304433 44.1641220464277, 142.399604372559 44.1642243107176, 142.399124836789 44.1658288542635)) ^^http://www.opengis.net/ont/geosparql#wktLiteral