メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.750832199988 35.4062680093667, 136.750581877788 35.406307430924, 136.750258142587 35.4063639245534, 136.749946040183 35.4049350674197, 136.750267690134 35.4048901181601, 136.750502994656 35.4048431806448, 136.750640729195 35.4055994803893, 136.750832199988 35.4062680093667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral