メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.747501462839 43.2047710943743, 141.747713343272 43.2048780079165, 141.747883047047 43.2049637786267, 141.747934172042 43.2049898835023, 141.748247911925 43.2051499186702, 141.748427863816 43.2052407269127, 141.747126120748 43.2066673154106, 141.746916050173 43.2065560480845, 141.746588980539 43.2063972864893, 141.746567388274 43.2063867834625, 141.746186335188 43.2061988795529, 141.745919953542 43.2060674612358, 141.745896969148 43.2060566001469, 141.747246594415 43.2046425409046, 141.747501462839 43.2047710943743)) ^^http://www.opengis.net/ont/geosparql#wktLiteral