メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.314986862178 43.0843713901247, 141.315339888376 43.0846916700305, 141.315312987156 43.0847065710096, 141.314605186409 43.0851145297624, 141.313639290348 43.0856719998744, 141.313470596582 43.0855151208468, 141.313238953772 43.0853082153419, 141.312943794469 43.0850445960721, 141.313066805196 43.0849563561698, 141.313897218791 43.0844804887447, 141.314281739351 43.084256754543, 141.314641034596 43.084051168008, 141.314986862178 43.0843713901247)) ^^http://www.opengis.net/ont/geosparql#wktLiteral