メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.770929925949 43.2087037737089, 141.771357863105 43.2089391938803, 141.770463589619 43.209931088109, 141.769972649788 43.209680068843, 141.769915850796 43.2096524042994, 141.769544601061 43.2094711580752, 141.770050298228 43.2089027446744, 141.770018669125 43.208888683285, 141.770081098118 43.2088168938479, 141.770113451962 43.2088317549352, 141.770447525257 43.2084562407885, 141.770482504602 43.2084768506465, 141.770929925949 43.2087037737089)) ^^http://www.opengis.net/ont/geosparql#wktLiteral