メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.359149871856 43.7846592470952, 142.358486277136 43.7851373869186, 142.357920992306 43.7855617811681, 142.356281058876 43.7843334071358, 142.356337085123 43.7842917223732, 142.356841370023 43.7839165138215, 142.356859629853 43.7839300687242, 142.357509055694 43.7834759042688, 142.359149871856 43.7846592470952)) ^^http://www.opengis.net/ont/geosparql#wktLiteral