メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.361423879772 43.7853708400505, 142.360781007896 43.7858356235296, 142.360767982084 43.7858449532638, 142.360401691728 43.785575580822, 142.360056585297 43.7853238544347, 142.359958916127 43.7852509167949, 142.359149871856 43.7846592470952, 142.359799285216 43.7841898602741, 142.360480175913 43.7836888122375, 142.362120706543 43.7848744953955, 142.362105779867 43.7848849180869, 142.361423879772 43.7853708400505)) ^^http://www.opengis.net/ont/geosparql#wktLiteral