メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.338549109229 43.7559869821013, 142.33908268878 43.7561525708835, 142.339056577713 43.7561952945075, 142.338425050802 43.757290338034, 142.337861971246 43.7571057822878, 142.337698296898 43.7570513588417, 142.336899171714 43.7567989284387, 142.337542355968 43.7557040589816, 142.337553340832 43.7556853632779, 142.338329757357 43.7559136335617, 142.338549109229 43.7559869821013)) ^^http://www.opengis.net/ont/geosparql#wktLiteral