メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.775801896029 43.2027810028579, 141.77505276124 43.20356417643, 141.775098211654 43.2035917235734, 141.774361610067 43.2043302142469, 141.7743306049 43.2043613119184, 141.773295192953 43.2038289881181, 141.773005561102 43.2036272083234, 141.774606469093 43.2033310881919, 141.774172557008 43.2031015667966, 141.774914363998 43.2023158382593, 141.775801896029 43.2027810028579)) ^^http://www.opengis.net/ont/geosparql#wktLiteral