メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.880787475451 43.0151389393267, 142.880573090753 43.0150140178813, 142.880477256745 43.0149585621622, 142.880212484371 43.0147841945678, 142.879845591509 43.0145768398229, 142.879858530377 43.0145395637964, 142.879999802431 43.0140713099842, 142.880621023623 43.0135412701783, 142.88127687822 43.0139458528687, 142.881786846391 43.0142591751226, 142.880823188759 43.0151075162607, 142.880787475451 43.0151389393267)) ^^http://www.opengis.net/ont/geosparql#wktLiteral