メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.647432199646 35.4329053910177, 136.647420610845 35.4332223479935, 136.64738554013 35.4339056410869, 136.647160095612 35.4339549120391, 136.646867587571 35.4339098625283, 136.646645718018 35.4338986009808, 136.646595485158 35.433876486577, 136.64661344014 35.4334134116599, 136.64663481739 35.4329001458392, 136.647432199646 35.4329053910177)) ^^http://www.opengis.net/ont/geosparql#wktLiteral