メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.361051696161 40.5468980584994, 141.35773601073 40.5459287151505, 141.358606499993 40.5453553058159, 141.359967194853 40.544424270619, 141.361223825209 40.5445204770454, 141.362165589046 40.5446996603537, 141.361051696161 40.5468980584994)) ^^http://www.opengis.net/ont/geosparql#wktLiteral