メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.373325593398 43.7389949915542, 142.37354040633 43.7390593168384, 142.374035301777 43.7392084122558, 142.373566669136 43.739964905224, 142.37355670121 43.7399809856473, 142.373321886834 43.7403953769394, 142.373120876192 43.7407358764002, 142.372705002512 43.7414878630583, 142.372017980507 43.7412777868514, 142.371396047853 43.7410880479714, 142.371590306082 43.7407727680151, 142.371832205264 43.7403486324609, 142.372260629606 43.7395973924639, 142.372709435542 43.7388104226057, 142.373159803055 43.7389453285655, 142.373325593398 43.7389949915542)) ^^http://www.opengis.net/ont/geosparql#wktLiteral