メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.349370967983 43.0713191832171, 141.349230919603 43.0719209438501, 141.349056204904 43.0724921180549, 141.34839861742 43.0724038733419, 141.348029094184 43.0723542844523, 141.347493854454 43.072282452815, 141.347575503792 43.0719424792128, 141.347636493708 43.0716885218909, 141.347789008787 43.0711140808353, 141.349370967983 43.0713191832171)) ^^http://www.opengis.net/ont/geosparql#wktLiteral