メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.38099168922 43.7843717752914, 142.380244989778 43.7845851294556, 142.379802465088 43.7846979125268, 142.379448472564 43.7848065697569, 142.378931755865 43.7838848681506, 142.378926187764 43.7838688233087, 142.379285723956 43.7837681789155, 142.379708856216 43.7836494246827, 142.38046664374 43.7834400517717, 142.38099168922 43.7843717752914)) ^^http://www.opengis.net/ont/geosparql#wktLiteral