メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.76945476857 43.2023265627887, 141.769160218001 43.2026565699782, 141.768823887224 43.2029994847612, 141.767835013972 43.2024810832452, 141.768139479483 43.2021379698166, 141.768481766947 43.2017950841496, 141.769476673807 43.2023038680214, 141.76945476857 43.2023265627887)) ^^http://www.opengis.net/ont/geosparql#wktLiteral