メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.372106771631 43.1186670037788, 141.372050815663 43.1188471014462, 141.371927030099 43.119245395801, 141.371813312125 43.1196113516574, 141.371746892881 43.1198249896307, 141.370285186674 43.1196230321799, 141.370367696909 43.1193855372496, 141.370469890147 43.1190474168182, 141.370527945831 43.1188552413256, 141.370598096249 43.1186230021568, 141.370649499035 43.1184528574143, 141.372106771631 43.1186670037788)) ^^http://www.opengis.net/ont/geosparql#wktLiteral