メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.341284172458 43.0654843780097, 141.340991973213 43.0654469608105, 141.340601865773 43.065394627928, 141.339603308309 43.0652595242514, 141.339748370833 43.064680742743, 141.339887364139 43.0640905897013, 141.341554143433 43.0643187035825, 141.341352246297 43.0651813074346, 141.341284172458 43.0654843780097)) ^^http://www.opengis.net/ont/geosparql#wktLiteral