メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.764437549283 35.4393619188918, 136.763614574319 35.4394699324871, 136.763392767214 35.4394393405844, 136.76275114127 35.4394596081925, 136.762752956961 35.4392680045815, 136.762965423891 35.4390315711951, 136.763579935327 35.4383728616998, 136.764613508486 35.4390080079879, 136.764428665891 35.4390023276671, 136.764437549283 35.4393619188918)) ^^http://www.opengis.net/ont/geosparql#wktLiteral