メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.38046664374 43.7834400517717, 142.379708856216 43.7836494246827, 142.379285723956 43.7837681789155, 142.378926187764 43.7838688233087, 142.378411878655 43.7829255108143, 142.379167184086 43.782697654368, 142.379933255803 43.7824862900603, 142.380455561799 43.7834320477226, 142.38046664374 43.7834400517717)) ^^http://www.opengis.net/ont/geosparql#wktLiteral