メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.348584448456 44.4871294715065, 142.349505588002 44.4873292370646, 142.349479687215 44.4873830850329, 142.349248855718 44.4878630272698, 142.348341615225 44.4876416260463, 142.347471626877 44.4874293244377, 142.347520985204 44.4873229347164, 142.347709987441 44.4869210077986, 142.348584448456 44.4871294715065)) ^^http://www.opengis.net/ont/geosparql#wktLiteral