メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.386794098598 43.7575458565413, 142.386845967417 43.7580170386974, 142.386925546597 43.7588309344228, 142.385791407418 43.7591512878845, 142.385157178579 43.7580417948619, 142.384731606302 43.7581606081136, 142.384419772862 43.7575795520173, 142.385901491217 43.7571557470424, 142.386741817287 43.756894283254, 142.386794098598 43.7575458565413)) ^^http://www.opengis.net/ont/geosparql#wktLiteral