メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.618114565615 34.9397822885711, 136.617631563232 34.9398005100626, 136.616352057719 34.9367915406219, 136.616081370242 34.9361093278623, 136.61850333166 34.9363021665337, 136.618272583095 34.938299334408, 136.618114565615 34.9397822885711)) ^^http://www.opengis.net/ont/geosparql#wktLiteral