メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.432228435807 43.0644288481309, 141.431100865399 43.0644614457437, 141.430447185672 43.0644827935519, 141.430105445606 43.0644887178414, 141.430021700855 43.0633797818885, 141.429949478326 43.0623278253583, 141.430309593917 43.0623168988113, 141.430948999139 43.0622999505478, 141.432057725555 43.0622535052157, 141.432108326156 43.0631088738413, 141.432147759131 43.0636063205438, 141.432228435807 43.0644288481309)) ^^http://www.opengis.net/ont/geosparql#wktLiteral