メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.59941712713 43.2980582422618, 144.598128564365 43.2983703042474, 144.598036639157 43.2983934305896, 144.597019541197 43.2961437877912, 144.597065367082 43.2961436911141, 144.598373168074 43.2967170390839, 144.598743914712 43.296883681921, 144.598915170853 43.2970253803963, 144.599012190116 43.2972194487331, 144.59941712713 43.2980582422618)) ^^http://www.opengis.net/ont/geosparql#wktLiteral