メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.731771415991 35.4393899206657, 136.731687686285 35.4395832360406, 136.730718258559 35.4393731004515, 136.72950024935 35.4391870583056, 136.729676741957 35.4383643930618, 136.732057989082 35.4387340853479, 136.731952212199 35.4389712628683, 136.731863973154 35.4391871321599, 136.731771415991 35.4393899206657)) ^^http://www.opengis.net/ont/geosparql#wktLiteral