メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.901141576066 43.4819703508369, 141.900589275368 43.4820497931728, 141.900424093395 43.4819436278794, 141.900367418758 43.4818868797504, 141.90032116935 43.4818226028774, 141.90007116252 43.4809571994795, 141.90083978878 43.4808431829692, 141.901141576066 43.4819703508369)) ^^http://www.opengis.net/ont/geosparql#wktLiteral