メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.367646634076 43.7745643408639, 142.367864720556 43.7750925666528, 142.367970118311 43.775316591643, 142.368264480449 43.7761288220929, 142.366467427256 43.7765854936442, 142.366435468764 43.7759859309686, 142.366429796279 43.7757224070773, 142.366368618929 43.7755103442753, 142.366230038253 43.7752623194233, 142.366108049585 43.7750182860806, 142.365819782554 43.7744782261996, 142.367351489256 43.7740243430299, 142.367646634076 43.7745643408639)) ^^http://www.opengis.net/ont/geosparql#wktLiteral