メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.766131038531 43.2058151197572, 141.765835655425 43.2061484216901, 141.764905333321 43.2071087537426, 141.763895384318 43.206588612629, 141.763952080769 43.2065254161705, 141.764610269334 43.2058762667017, 141.764790842749 43.2056552162671, 141.764856454265 43.2055828453823, 141.765114774457 43.2053167627249, 141.766131038531 43.2058151197572)) ^^http://www.opengis.net/ont/geosparql#wktLiteral