メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.746142689407 35.4238460717911, 136.74305885829 35.4247130069787, 136.74264987352 35.4235861084214, 136.745284869991 35.4230310919986, 136.745782666874 35.423421622521, 136.745873263737 35.4235110919629, 136.746012981252 35.4236840748548, 136.746142689407 35.4238460717911)) ^^http://www.opengis.net/ont/geosparql#wktLiteral