メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.446869087978 43.8253195758075, 142.445855968511 43.8261802651572, 142.445093989628 43.8265435613016, 142.444568288625 43.8267349792869, 142.443937255875 43.8269075215626, 142.443121944739 43.8270613177621, 142.442016965172 43.82715843911, 142.441148402622 43.8271217871245, 142.440700964019 43.8271034805731, 142.439722953491 43.8269352133045, 142.441595237998 43.8253241493228, 142.443865005873 43.8234513354767, 142.445919237432 43.8247277310029, 142.446869087978 43.8253195758075)) ^^http://www.opengis.net/ont/geosparql#wktLiteral