メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.859714546729 43.3329887960716, 141.859863014582 43.3334567009404, 141.859938207656 43.3337495209493, 141.858946183492 43.333880261467, 141.858932604622 43.3338381588296, 141.85886374749 43.3336132967642, 141.858729326679 43.3331684355847, 141.858637741739 43.3328354002551, 141.859640573537 43.3326901431062, 141.859714546729 43.3329887960716)) ^^http://www.opengis.net/ont/geosparql#wktLiteral