メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.372975426601 43.0886451498857, 141.372972155193 43.0886591904847, 141.372759420828 43.0895780877011, 141.37209352899 43.0894864823641, 141.371113137695 43.0893646094595, 141.37121402635 43.0889602228454, 141.371323529169 43.0884299439641, 141.371615007316 43.0884662883404, 141.371752469533 43.0879332694373, 141.371980832172 43.0879610415795, 141.37234701296 43.0880072415261, 141.372713070627 43.0880620884673, 141.373098840406 43.0881140613487, 141.372975426601 43.0886451498857)) ^^http://www.opengis.net/ont/geosparql#wktLiteral