メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390163658995 44.1790426293801, 142.389736483108 44.1789715325572, 142.389752875949 44.1787522136992, 142.389741717982 44.178507015894, 142.389715673842 44.1782329013666, 142.389676572147 44.17802887337, 142.389960015507 44.1780748145901, 142.390427219134 44.1781505564248, 142.390163658995 44.1790426293801)) ^^http://www.opengis.net/ont/geosparql#wktLiteral