メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.482507467347 40.502762758724, 141.48192551412 40.5027467223928, 141.48191494074 40.5025247280356, 141.481908390087 40.5022801598161, 141.48228779608 40.502278022942, 141.482304086926 40.5026576969201, 141.482506442609 40.5026565567987, 141.482507467347 40.502762758724)) ^^http://www.opengis.net/ont/geosparql#wktLiteral