メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.704192055324 44.3651234047045, 141.703687587674 44.3654473177822, 141.703120109874 44.3658374795773, 141.70287207432 44.3656374730703, 141.702122198071 44.3650262751041, 141.702034295396 44.3649559252129, 141.70219107541 44.3648506089231, 141.702589748191 44.3645991110799, 141.703112794456 44.3642692095469, 141.704139462064 44.365081877172, 141.704192055324 44.3651234047045)) ^^http://www.opengis.net/ont/geosparql#wktLiteral