メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.397652429532 44.1626174913813, 142.39879581795 44.162801385524, 142.398636066795 44.1634786959186, 142.398919304433 44.1641220464277, 142.398465031307 44.164040400529, 142.397295696029 44.1638514017859, 142.396158268767 44.1636703845638, 142.396310767583 44.1631048752322, 142.396483051074 44.1624293979548, 142.397652429532 44.1626174913813)) ^^http://www.opengis.net/ont/geosparql#wktLiteral