メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.703130903509 44.3596466804302, 141.702733781387 44.359319567461, 141.702685539774 44.3592798190198, 141.703165514634 44.3589654583383, 141.703118085191 44.3588962522854, 141.703536448034 44.3586198455336, 141.70365921923 44.3587126873647, 141.704082864902 44.3590331739817, 141.703130903509 44.3596466804302)) ^^http://www.opengis.net/ont/geosparql#wktLiteral