メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.917870539674 43.5228676471365, 141.916870378075 43.522958703436, 141.916279367464 43.5227190052024, 141.916225980669 43.5225431419923, 141.91585171182 43.521263358585, 141.9177607876 43.5209658723222, 141.917802825893 43.5212461703452, 141.917879687981 43.5216863834365, 141.91790286573 43.5219785466794, 141.917903032541 43.5223950495977, 141.917875940694 43.522816923206, 141.917870539674 43.5228676471365)) ^^http://www.opengis.net/ont/geosparql#wktLiteral