メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.339659261908 43.7454276071892, 142.339428778141 43.7458157884561, 142.339176573825 43.7462409063375, 142.338020102499 43.7458806667034, 142.337545432285 43.7454552082997, 142.336121140746 43.7450142913238, 142.336780038151 43.7440411516137, 142.337075308564 43.7438543018907, 142.339485079354 43.7445868962815, 142.339476828357 43.7445986988499, 142.340045836293 43.7447550596736, 142.339659261908 43.7454276071892)) ^^http://www.opengis.net/ont/geosparql#wktLiteral