メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.385218746398 43.0934295945364, 141.385422622463 43.0939709693642, 141.383962594918 43.0942365916609, 141.383716081784 43.0942824080211, 141.383291757837 43.094340806324, 141.382925526152 43.0933173763798, 141.383599684258 43.0932015818347, 141.385037557565 43.0929265083389, 141.385218746398 43.0934295945364)) ^^http://www.opengis.net/ont/geosparql#wktLiteral