メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.344520169713 43.0585196487773, 141.344278372105 43.0594908851466, 141.344182217196 43.0598981756449, 141.344089589218 43.0602808783651, 141.3440594576 43.060418626984, 141.34247510016 43.0602080141709, 141.34254519421 43.0599510809969, 141.342607922331 43.0597211453718, 141.342630538697 43.0596382427749, 141.342726761064 43.0592856704946, 141.342822245789 43.0588592454869, 141.342956106301 43.0583214427042, 141.344520169713 43.0585196487773)) ^^http://www.opengis.net/ont/geosparql#wktLiteral