メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.353827667466 43.0877444341336, 141.353657547665 43.088453909091, 141.352881914735 43.088363012775, 141.3521120488 43.0882519017831, 141.352298722664 43.0875466370436, 141.352462178739 43.0868409792728, 141.353071420498 43.086924456012, 141.353227302811 43.0869471985487, 141.354005731928 43.0870492264454, 141.353827667466 43.0877444341336)) ^^http://www.opengis.net/ont/geosparql#wktLiteral