メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.586908111967 43.3348911244019, 145.586555319659 43.3353652473149, 145.586159005444 43.3358469695356, 145.584846712418 43.3353023355699, 145.585233133825 43.3348017093149, 145.585606675836 43.3343333829798, 145.586621347989 43.3347633615904, 145.586908111967 43.3348911244019)) ^^http://www.opengis.net/ont/geosparql#wktLiteral