メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.902466510719 43.4755255546189, 141.902475122405 43.4755478387208, 141.90277173709 43.4765479041091, 141.901766401534 43.4766958139148, 141.901443323303 43.4756656385637, 141.901143620201 43.4746989632797, 141.901643802975 43.4746243541744, 141.901678185838 43.4746192194713, 141.902175055897 43.4745450543697, 141.90218578424 43.4745813395697, 141.902466510719 43.4755255546189)) ^^http://www.opengis.net/ont/geosparql#wktLiteral