メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.339682362149 43.7501567813557, 142.340171418127 43.7503045916578, 142.340642850469 43.7504608886982, 142.340388339599 43.750922242681, 142.34008158535 43.7514455736112, 142.339766464555 43.7519629676635, 142.338343713332 43.7514994298006, 142.338624571306 43.7510184395169, 142.338631497272 43.7510065849902, 142.338932912832 43.7504958855855, 142.339226177966 43.7500188927573, 142.339682362149 43.7501567813557)) ^^http://www.opengis.net/ont/geosparql#wktLiteral