メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.340762986297 43.0605625864665, 141.340621013905 43.0611413244489, 141.340479202159 43.0617154911411, 141.338908425778 43.0614995219197, 141.339186006651 43.0603465010103, 141.339322594488 43.0597953622261, 141.339691736203 43.0598489390049, 141.339672546918 43.0599466146874, 141.340379737965 43.0600421945596, 141.340407151858 43.0599395204416, 141.34091121514 43.0600081622809, 141.340762986297 43.0605625864665)) ^^http://www.opengis.net/ont/geosparql#wktLiteral