メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.751931876739 35.0795376401937, 136.751987352225 35.0797496015432, 136.751252033017 35.0798446365651, 136.75108304774 35.0798699067722, 136.750934614134 35.0798633433537, 136.750298989549 35.079692008027, 136.750359360893 35.079494033943, 136.750462969016 35.0791910604645, 136.751931876739 35.0795376401937)) ^^http://www.opengis.net/ont/geosparql#wktLiteral