メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.988769898611 43.5621714876467, 144.988698449198 43.5621226766912, 144.987989200897 43.5616481877058, 144.987880436983 43.5615740433307, 144.988611216804 43.5609584326617, 144.98867187129 43.5609994854798, 144.988908413098 43.5611746736339, 144.988944724007 43.5611991887493, 144.989113902939 43.5613133364749, 144.988569918611 43.5617918868923, 144.988753785885 43.5619143327596, 144.988861952182 43.5619880352248, 144.988926807619 43.5620321167684, 144.988769898611 43.5621714876467)) ^^http://www.opengis.net/ont/geosparql#wktLiteral