メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.940472569847 43.6174718596276, 141.940889623133 43.6183228448979, 141.941105757668 43.6187639177775, 141.941031382058 43.6187897342262, 141.938334436544 43.619469883611, 141.938112231605 43.6190180327514, 141.938000337241 43.6187905036929, 141.937977465719 43.6187439551943, 141.937671054296 43.6181207300677, 141.937384046133 43.6175370801477, 141.940118978264 43.6168627868377, 141.940168092922 43.6168505103055, 141.940472569847 43.6174718596276)) ^^http://www.opengis.net/ont/geosparql#wktLiteral