メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.342925850319 43.7611961420348, 142.342587966403 43.7617823003975, 142.34230338384 43.7622520856263, 142.339463899903 43.761399447214, 142.339874267972 43.7608958134057, 142.340301265392 43.7603717740496, 142.340310398695 43.7603605504794, 142.342925850319 43.7611961420348)) ^^http://www.opengis.net/ont/geosparql#wktLiteral