メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.346379754458 44.4832195494778, 142.345748803492 44.48307959414, 142.34577950207 44.483015830405, 142.345199924623 44.4828845108127, 142.345754993968 44.4818071051206, 142.345803628628 44.4818184909824, 142.346904752214 44.4820759250359, 142.346379754458 44.4832195494778)) ^^http://www.opengis.net/ont/geosparql#wktLiteral