メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.780964953407 35.4202161742641, 136.780753252107 35.4200866355834, 136.780744243419 35.419666240465, 136.784151663378 35.4195466699943, 136.785455955005 35.4194949421219, 136.785481404415 35.4200008445298, 136.781948170308 35.4201335562798, 136.781953616612 35.4201912820892, 136.780964953407 35.4202161742641)) ^^http://www.opengis.net/ont/geosparql#wktLiteral