メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.034564720346 42.9148084420577, 143.033351039394 42.9147155288925, 143.033540051634 42.9132535094444, 143.033550679575 42.9131711475299, 143.034779530059 42.9132403239238, 143.034764217903 42.9133570391374, 143.03475685033 42.9134134263694, 143.034747819134 42.9134821323174, 143.034643083435 42.9142805551313, 143.034564720346 42.9148084420577)) ^^http://www.opengis.net/ont/geosparql#wktLiteral