メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.379589957546 43.0659398200038, 141.378510029396 43.0657187855709, 141.377882601181 43.0655971903247, 141.377266766282 43.0655173142478, 141.377086048216 43.0654904070215, 141.377329479849 43.0644359817777, 141.37800162411 43.0646366908525, 141.378018239753 43.0646418811541, 141.378969352033 43.0649355745908, 141.378997814793 43.0649442307152, 141.380057792161 43.0652661018815, 141.379589957546 43.0659398200038)) ^^http://www.opengis.net/ont/geosparql#wktLiteral