メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.309727868911 43.0915817009564, 141.309559337319 43.0916772991809, 141.308874356563 43.0920849159327, 141.308807212895 43.0921455496601, 141.308517567691 43.0918719800857, 141.307871142404 43.0912726645144, 141.308508914229 43.090908335013, 141.30879082405 43.0907405990349, 141.309727868911 43.0915817009564)) ^^http://www.opengis.net/ont/geosparql#wktLiteral