メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.42867785867 43.8155894435215, 142.428550704132 43.8156964289976, 142.426144032701 43.8177212695378, 142.425921379401 43.8175553918383, 142.425260978402 43.8171006225313, 142.424256408083 43.8167080425694, 142.42314139377 43.8165247355282, 142.420946247626 43.8159353873616, 142.422524685717 43.8146221050258, 142.424197236355 43.813230433819, 142.425606212137 43.8120427594707, 142.42561795904 43.8120328125131, 142.429789165339 43.8146543848458, 142.42867785867 43.8155894435215)) ^^http://www.opengis.net/ont/geosparql#wktLiteral