メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.379231706561 44.1737788060278, 142.377407915571 44.1734974641353, 142.377584240544 44.1726976801077, 142.377633114097 44.1723827652048, 142.379595100239 44.1726132838409, 142.379562844835 44.1727124845909, 142.379504281148 44.1728926496581, 142.379499418829 44.17290845829, 142.379231706561 44.1737788060278)) ^^http://www.opengis.net/ont/geosparql#wktLiteral