メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.368568353659 43.766689823524, 142.36887412256 43.7672460470798, 142.368227783498 43.7674349463191, 142.367356029764 43.7676897172603, 142.367042658186 43.7671292772809, 142.366712032228 43.7665378606215, 142.3671492888 43.7664178707306, 142.368243851724 43.7661039599147, 142.368568353659 43.766689823524)) ^^http://www.opengis.net/ont/geosparql#wktLiteral