メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.406526228725 43.789969733412, 142.407010454938 43.7902559716954, 142.40806652533 43.7908917011699, 142.407632846781 43.7912481239858, 142.406965686365 43.7918154082898, 142.406919482232 43.7918489980446, 142.405886521104 43.7912039268725, 142.405412554032 43.7909064878677, 142.404835554515 43.7905495528124, 142.405938902451 43.7895979090816, 142.406526228725 43.789969733412)) ^^http://www.opengis.net/ont/geosparql#wktLiteral