メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.65998890754 45.4357616712656, 141.66104920516 45.4364678928048, 141.662120178579 45.437187093722, 141.662851881123 45.4376539933646, 141.661343564431 45.4388099896811, 141.661053075832 45.4390307842786, 141.66101678246 45.4389919327667, 141.660321570333 45.4385829959492, 141.659131868862 45.4378633051892, 141.658070017586 45.4372054241255, 141.657823921559 45.4370524409888, 141.657320513438 45.436740650593, 141.658193113328 45.4360747864612, 141.659243988765 45.435255034927, 141.65998890754 45.4357616712656)) ^^http://www.opengis.net/ont/geosparql#wktLiteral