メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.882074802478 43.0174010266523, 142.882027482724 43.0173712571262, 142.880966578832 43.0167029909375, 142.881944763432 43.0158626566781, 142.882056373534 43.0159328634118, 142.882952192811 43.0164897144172, 142.883031015708 43.0165356261022, 142.883068861443 43.0165577119565, 142.882603351343 43.0169591177827, 142.882074802478 43.0174010266523)) ^^http://www.opengis.net/ont/geosparql#wktLiteral