メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.102222031119 43.8261678817571, 144.102254465832 43.8260923589956, 144.101542180012 43.8248821639049, 144.102931215184 43.8244589796841, 144.103619423985 43.8256687490573, 144.103638283609 43.8257006138788, 144.10349185674 43.8257460095267, 144.102222031119 43.8261678817571)) ^^http://www.opengis.net/ont/geosparql#wktLiteral