メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.87900595117 43.0153718070902, 142.877995412834 43.0147113272728, 142.877902458395 43.0146559941046, 142.878032841957 43.0142370325951, 142.878151454592 43.0137026540455, 142.879126506804 43.0142869501252, 142.879288571294 43.014380583563, 142.879247903974 43.0145277243983, 142.87900595117 43.0153718070902)) ^^http://www.opengis.net/ont/geosparql#wktLiteral