メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.785264840039 35.4156155920093, 136.78281919456 35.4156969256958, 136.782804483221 35.4152342227794, 136.785254345059 35.4151409310521, 136.785258143562 35.4153754401809, 136.785264840039 35.4156155920093)) ^^http://www.opengis.net/ont/geosparql#wktLiteral