メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.053719679187 42.9162151423115, 143.054433625233 42.9162528948699, 143.05427780433 42.9173974513588, 143.053573783489 42.917343873488, 143.052863994633 42.9172957467441, 143.052768845928 42.9172858641152, 143.052924717004 42.9161503827538, 143.053012555164 42.9161575040494, 143.053719679187 42.9162151423115)) ^^http://www.opengis.net/ont/geosparql#wktLiteral