メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.351007256954 43.0260803678374, 141.350961737191 43.0264538870482, 141.350866443138 43.0271246549333, 141.348864640421 43.0269901205048, 141.348958234257 43.026312589352, 141.348985239462 43.0263144196989, 141.349030422113 43.0258533368534, 141.349053061934 43.0256226904627, 141.349760989174 43.0256806578838, 141.351048064124 43.0257734844897, 141.351007256954 43.0260803678374)) ^^http://www.opengis.net/ont/geosparql#wktLiteral