メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.364351888656 43.1138656432571, 141.364942267737 43.1139522764837, 141.364630471659 43.1151809760852, 141.364039909099 43.1150994720199, 141.36282387076 43.1149413184063, 141.362930008922 43.1144997282806, 141.363035329778 43.1141145317205, 141.363139496848 43.1136895921092, 141.364351888656 43.1138656432571)) ^^http://www.opengis.net/ont/geosparql#wktLiteral