メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.934185752416 43.8094641983235, 141.93427235178 43.8094255849073, 141.935117966858 43.8102920600742, 141.932046395777 43.8113661235391, 141.931932789234 43.8114059446443, 141.932260957535 43.8096591958008, 141.932373399454 43.8090605691299, 141.932544722772 43.8090767424289, 141.934224408546 43.8092552428971, 141.934185752416 43.8094641983235)) ^^http://www.opengis.net/ont/geosparql#wktLiteral