メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.065250280701 42.9193282278193, 143.065397607588 42.9195573760396, 143.064745485453 42.9195162315867, 143.064772596522 42.9193006812912, 143.064798836865 42.919091608074, 143.06483296325 42.9188201639664, 143.065193436124 42.9192481022352, 143.065250280701 42.9193282278193)) ^^http://www.opengis.net/ont/geosparql#wktLiteral