メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.405626645226 43.7376636321593, 142.405676104682 43.7381563240153, 142.404941974865 43.738202630387, 142.403317496321 43.7382916393513, 142.401963800578 43.738376473597, 142.401644910859 43.7383918524143, 142.401614580101 43.7381163913323, 142.40159241434 43.7378780491482, 142.401532028289 43.7374326250153, 142.403223934995 43.7373270625821, 142.404852394828 43.7372214358651, 142.405581602694 43.737175452845, 142.405626645226 43.7376636321593)) ^^http://www.opengis.net/ont/geosparql#wktLiteral