メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.767478992168 43.2043973658369, 141.767106155065 43.2048014469865, 141.76680382641 43.2050964635888, 141.766781010459 43.2051187300868, 141.766504489913 43.2049935041087, 141.766479185463 43.2050140748613, 141.765742388655 43.2046524258581, 141.766093267708 43.2042967843469, 141.766401929492 43.20397274864, 141.766483978296 43.2038941880502, 141.767478992168 43.2043973658369)) ^^http://www.opengis.net/ont/geosparql#wktLiteral