メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.42193717032 43.7662135008546, 142.42135728356 43.7662493808143, 142.420731795239 43.766295066114, 142.420653772985 43.7653066088733, 142.421244402481 43.7652823891661, 142.421851088096 43.7652308932458, 142.421931256998 43.7660266806696, 142.42193717032 43.7662135008546)) ^^http://www.opengis.net/ont/geosparql#wktLiteral