メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.374398885365 43.0370372212467, 141.37490838823 43.0370361937502, 141.376067290731 43.0370668464149, 141.376065080619 43.0370806849712, 141.375997375484 43.037534854046, 141.375974796109 43.0376801955971, 141.375951795904 43.0377808735724, 141.375921219726 43.0379559741424, 141.375900518339 43.0379553939054, 141.374849756627 43.0379174072039, 141.374354769021 43.0379086293573, 141.373588331374 43.0378877146453, 141.37363699074 43.0374729970811, 141.37363999729 43.0370188970518, 141.37397525644 43.0370203371718, 141.374398885365 43.0370372212467)) ^^http://www.opengis.net/ont/geosparql#wktLiteral