メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.738987889027 35.4119659771535, 136.73763419859 35.411689604722, 136.737722167554 35.4114262970306, 136.737734837011 35.4111045899553, 136.73922673967 35.4114961303059, 136.738987889027 35.4119659771535)) ^^http://www.opengis.net/ont/geosparql#wktLiteral