メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.152121718706 35.0365539522924, 137.151717097171 35.0371433651722, 137.151373079052 35.0369706903452, 137.151673383856 35.0365128215856, 137.151995524042 35.036534212774, 137.152087185516 35.0365407764729, 137.152121718706 35.0365539522924)) ^^http://www.opengis.net/ont/geosparql#wktLiteral