メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.749093285731 34.6946761006564, 137.748741273795 34.694696882725, 137.748739306973 34.6945271410641, 137.74906742405 34.6944515609663, 137.749078507288 34.6943854278068, 137.749217667604 34.6943948802075, 137.749300975795 34.6944328628285, 137.749321270331 34.6944991890772, 137.74929613371 34.6945824190524, 137.749087044993 34.6945926766612, 137.749093285731 34.6946761006564)) ^^http://www.opengis.net/ont/geosparql#wktLiteral