メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.357670084575 43.7660187754865, 142.35801133028 43.7665834768848, 142.356438665826 43.7670421281782, 142.356336670553 43.7668521299089, 142.356126081018 43.7664757594909, 142.355782791939 43.7659173476522, 142.35736438519 43.7654614928858, 142.357670084575 43.7660187754865)) ^^http://www.opengis.net/ont/geosparql#wktLiteral