メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.351385802079 43.7852282970195, 142.350635409048 43.784746452622, 142.351316681255 43.7842380633903, 142.351658184724 43.7839997852799, 142.351894774144 43.7838197219705, 142.352191567603 43.7840287327831, 142.352283098127 43.7840731286678, 142.352617953364 43.7843169488851, 142.351385802079 43.7852282970195)) ^^http://www.opengis.net/ont/geosparql#wktLiteral