メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.760433839573 43.2014950390894, 141.760416974881 43.2015121968023, 141.760092341261 43.2018474685751, 141.759135623245 43.2013954500432, 141.759173399979 43.2013598146361, 141.759473542716 43.20105193889, 141.759815839079 43.2006837593203, 141.760759203888 43.201163918541, 141.760433839573 43.2014950390894)) ^^http://www.opengis.net/ont/geosparql#wktLiteral