メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.449738060663 43.7709239707002, 142.449784720757 43.7713879047979, 142.449841723975 43.771919962034, 142.44990765622 43.7725383225504, 142.449936144697 43.7728282440692, 142.448532524923 43.7728914792666, 142.448499171662 43.7726165972671, 142.44843239095 43.7719870553696, 142.448419259311 43.7718688148232, 142.448375087523 43.7714709427361, 142.448343952174 43.7711485730577, 142.448319330399 43.7709787010143, 142.448253453447 43.770327832481, 142.449661870859 43.7702475594154, 142.449700624197 43.7705144845278, 142.449738060663 43.7709239707002)) ^^http://www.opengis.net/ont/geosparql#wktLiteral