メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.043623612238 42.9115647273697, 143.043971675932 42.9115886936379, 143.043986522403 42.9115898566389, 143.043832672833 42.9127046308452, 143.043471965754 42.9126802592009, 143.042809041211 42.9126335704872, 143.042962008292 42.9115156392751, 143.043623612238 42.9115647273697)) ^^http://www.opengis.net/ont/geosparql#wktLiteral