メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.052781053194 42.9060674521909, 143.052693337343 42.9066877002801, 143.052610879062 42.9073223300513, 143.051863918504 42.9072614464013, 143.051144469154 42.9072043050405, 143.051306088948 42.9059589826603, 143.052118312609 42.9060222970545, 143.052145318255 42.9060242182284, 143.052781053194 42.9060674521909)) ^^http://www.opengis.net/ont/geosparql#wktLiteral