メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.391979733315 43.8146519176474, 142.392456702294 43.814990134115, 142.391702363847 43.8155382872224, 142.391458495535 43.815715498092, 142.390764056527 43.816217073992, 142.390594588266 43.8163402206722, 142.390383458965 43.8164992641763, 142.389384191212 43.815783996202, 142.388703740841 43.8153011149892, 142.388779584766 43.8152497754465, 142.388916970441 43.8151471162314, 142.389286796577 43.8148636074038, 142.389799389898 43.8145061582526, 142.390287144031 43.8141607613324, 142.390776906096 43.8137838573934, 142.391979733315 43.8146519176474)) ^^http://www.opengis.net/ont/geosparql#wktLiteral