メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.3998631921 37.2598476523108, 138.397967532238 37.2615873324782, 138.397342555443 37.2632633263916, 138.394079844154 37.2626931842349, 138.393275582863 37.2614777744779, 138.392090489807 37.2593169697715, 138.393018568822 37.2589850948494, 138.393843799488 37.2585803286736, 138.394614112086 37.2578929221107, 138.395331726776 37.2571685764128, 138.396732404262 37.2579805267711, 138.3998631921 37.2598476523108)) ^^http://www.opengis.net/ont/geosparql#wktLiteral