メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.359625600293 44.3472751407556, 143.358987089025 44.3471601576854, 143.358146897151 44.3469816308339, 143.358789258227 44.3451851637487, 143.360086806561 44.3454562403257, 143.360075068922 44.3455040626714, 143.35964640031 44.3471777653303, 143.359625600293 44.3472751407556)) ^^http://www.opengis.net/ont/geosparql#wktLiteral