メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.055896531458 42.9112620312652, 143.056601271547 42.9113100317661, 143.056442434413 42.9124759246622, 143.055751602713 42.9124244490922, 143.055012532601 42.9123716905746, 143.055003049726 42.9123710532055, 143.055187341108 42.911210399997, 143.055896531458 42.9112620312652)) ^^http://www.opengis.net/ont/geosparql#wktLiteral