メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.901820688888 43.4611200288705, 141.901570836693 43.4611569307381, 141.901345285274 43.4611943279127, 141.900715744511 43.4590468309735, 141.901188989271 43.4589968259986, 141.901451016309 43.4589191736751, 141.902861373078 43.4584807156044, 141.904485550369 43.4579991070732, 141.904751399887 43.458915101034, 141.904998663917 43.4597354338373, 141.905262951041 43.4606104585431, 141.904313937513 43.4607519148574, 141.901820688888 43.4611200288705)) ^^http://www.opengis.net/ont/geosparql#wktLiteral