メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.694970529708 44.3650000253428, 141.694947568453 44.3649820174551, 141.692591477409 44.3665069701108, 141.692069789117 44.3660196001257, 141.69174930489 44.3655618662666, 141.692730625147 44.3648937556658, 141.69391351783 44.3641712114056, 141.695117621902 44.3633738010663, 141.696197827434 44.3642015916328, 141.694970529708 44.3650000253428)) ^^http://www.opengis.net/ont/geosparql#wktLiteral