メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.048082501207 42.9182267927484, 143.047338025699 42.9181792251222, 143.046521821372 42.9181270872972, 143.046648411457 42.9171459898666, 143.047476141229 42.9172283595093, 143.047481019863 42.9171948470443, 143.047488444231 42.9171435234118, 143.047518749779 42.9169337233849, 143.048259309859 42.9169793469935, 143.048217918759 42.9172198195129, 143.048082501207 42.9182267927484)) ^^http://www.opengis.net/ont/geosparql#wktLiteral