メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.926966504943 43.4848894446856, 141.924477428749 43.4852610036669, 141.923625161492 43.485399828602, 141.92325022501 43.4854608928446, 141.922770425081 43.4838175547469, 141.92314295201 43.4837583473478, 141.923666444949 43.4836750955468, 141.92473614239 43.483504957444, 141.924740717502 43.4835205830306, 141.926490355059 43.4832497147358, 141.926708555537 43.4839747589341, 141.926966504943 43.4848894446856)) ^^http://www.opengis.net/ont/geosparql#wktLiteral