メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.352945090282 44.4779573524513, 142.352085434916 44.4777498616425, 142.352130167543 44.4776585914774, 142.352154019153 44.4776645118614, 142.35252974919 44.476857643119, 142.353373321969 44.4770581161156, 142.352986320267 44.4778707615219, 142.352945090282 44.4779573524513)) ^^http://www.opengis.net/ont/geosparql#wktLiteral