メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.367543743442 43.8271035975322, 142.367506844434 43.8272211943138, 142.367460526556 43.8273787611833, 142.36716567425 43.8276040883346, 142.364015528952 43.829925849992, 142.361597333416 43.828176399664, 142.361837739842 43.8279842610615, 142.362855735761 43.8274603648878, 142.365558881746 43.8256002711765, 142.366744880018 43.8264811455592, 142.367543743442 43.8271035975322)) ^^http://www.opengis.net/ont/geosparql#wktLiteral