メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.052203808296 42.9160922032368, 143.052924717004 42.9161503827538, 143.052768845928 42.9172858641152, 143.052733093783 42.9175464837543, 143.052023003813 42.9174973698875, 143.052041118883 42.9172339193478, 143.051381135382 42.9171890926237, 143.051283733229 42.9171826004724, 143.051285746614 42.9171680275208, 143.051420193024 42.9160387474667, 143.051513088081 42.9160446390046, 143.052203808296 42.9160922032368)) ^^http://www.opengis.net/ont/geosparql#wktLiteral